A fine adjustment type tool holder based on piezoelectric ceramics

Abstract

The utility model provides a kind of fine adjustment type tool shank based on piezoelectric ceramic, comprising: the connecting component that can produce deformation is installed on tool shank main body, wherein connecting component includes the deformation piece that can produce deformation under the action of external force.After tool is installed on connecting component, piezoelectric ceramic fine adjustment component can be connected voltage, make piezoelectric ceramic fine adjustment component extrude the deformation piece by its own deformation, make deformation piece synchronous produce deformation, and then make tool installed on the connecting component produce position deviation. Thus realize the purpose of fine adjustment to the position of tool. Based on the above content, structure design is simple and improve the precision of tool fine adjustment.

Description

Technical Field

[0001] This utility model generally relates to the field of precision machining tool holder technology, and specifically to a fine-tuning tool holder based on piezoelectric ceramics. Background Technology

[0002] In precision machining processes, the demand for precise tool adjustment is increasing. Traditional tool holders have many shortcomings in terms of adjustment accuracy, response speed, and stability, making it difficult to meet the needs of high-precision machining fields such as aerospace and electronics manufacturing.

[0003] In processes such as precision drilling and ultra-precision milling with tiny apertures, even minor deviations in traditional tool holders can lead to product scrap and increased production costs.

[0004] To eliminate minute deviations, the position of the tool holder needs to be fine-tuned to achieve the target machining accuracy. However, existing fine-tuning tool holders have complex structures and limited fine-tuning accuracy, making them unable to meet the ever-increasing requirements for machining precision. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a fine-tuning tool holder based on piezoelectric ceramics.

[0006] This utility model provides a fine-tuning tool holder based on piezoelectric ceramics, comprising: The handle body, wherein the axial direction of the handle body is a first direction; A connecting assembly is mounted on the tool holder body for connecting to a cutting tool; the connecting assembly includes: a deformation member connected to the tool holder body, the deformation member being capable of elastic deformation when subjected to an external force along a first direction, thereby causing the cutting tool to shift position along the first direction; the tool holder body has a mounting groove at one end near the deformation member; A piezoelectric ceramic fine-tuning component is disposed in the mounting groove, with one end abutting against the main body of the tool holder and the other end abutting against the deformable component. It is used to generate deformation when the voltage is applied, thereby squeezing the deformable component and providing an external force along a first direction to the deformable component, so that the deformable component generates deformation.

[0007] According to the technical solution provided by this utility model, the connecting component further includes: A connector is fixedly connected to one end of the deformable member away from the main body of the tool holder; the end of the connector away from the deformable member is used to mount the tool.

[0008] According to the technical solution provided by this utility model, the mounting groove includes multiple partition spaces; the multiple partition spaces are arranged in a ring array around the axis of the tool holder body.

[0009] According to the technical solution provided by this utility model, the piezoelectric ceramic fine-tuning component includes: multiple ceramic sheet groups; Each of the ceramic tile groups is set in an independent partitioned space; the end of the ceramic tile group near the handle body abuts against the handle body, and the end near the deformation component abuts against the deformation component.

[0010] According to the technical solution provided by this utility model, the ceramic tile group includes multiple ceramic tiles; the multiple ceramic tiles are arranged along a first direction and are used to drive the cutting tool to move along the first direction through the connecting member when deformation occurs.

[0011] According to the technical solution provided by this utility model, it also includes a controller; The controller is electrically connected to the piezoelectric ceramic trimmer assembly, and the controller is configured to provide voltage to the piezoelectric ceramic trimmer assembly to cause the piezoelectric ceramic trimmer assembly to deform.

[0012] According to the technical solution provided by this utility model, the controller is further configured as follows: It can independently provide voltage to each of the ceramic tile groups; by controlling the voltage value applied to different ceramic tile groups, the corresponding ceramic tile groups can produce different amounts of expansion and contraction along the first direction, thereby causing the deformable part to produce non-uniform elastic deformation at different positions in the circumferential direction, thereby driving the tool to deflect, so as to change the angle between the tool axis mounted on the connector and the first direction.

[0013] According to the technical solution provided by this utility model, the deformable part includes: an integrally formed elastic telescopic part and a connecting part; The elastic telescopic part is connected to the main body of the handle, and a mating groove for connecting to the main body of the handle is provided at one end near the main body of the handle; the piezoelectric ceramic fine-tuning component abuts against the bottom of the mating groove at one end near the mating groove. The end of the connecting part near the connector is used to connect with the connector.

[0014] The beneficial effects of this utility model are as follows: A deformable connecting assembly is mounted on the tool holder body, wherein the connecting assembly includes a deformable element that can deform under external force. After the tool is mounted on the connecting assembly, voltage can be applied to the piezoelectric ceramic fine-tuning component, causing the piezoelectric ceramic fine-tuning component to compress the deformable element through its own deformation, causing the deformable element to deform synchronously, thereby causing the tool mounted on the connecting assembly to shift its position. This achieves the purpose of fine-tuning the tool's position. Based on the above, the structural design is simple and improves the accuracy of tool fine-tuning. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of a fine-tuning tool holder based on piezoelectric ceramics; Figure 2 This is a cross-sectional view from the side of a piezoelectric ceramic-based fine-tuning tool holder. Figure 3 This is a schematic diagram when the angle between the tool axis and the first direction is not equal to zero. The components include: 1. Handle body; 2. Deformation component; 3. Connector; 4. Ceramic tile assembly; 5. Through hole; 21. Bending structure; 22. Connection structure; 23. Mating groove. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0017] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] refer to Figure 1 The arrow indicates the first direction.

[0019] This utility model provides a fine-tuning tool holder based on piezoelectric ceramics, comprising: The handle body 1 has its axis oriented in a first direction; A connecting assembly is mounted on the tool holder body 1 for connecting to a cutting tool; the connecting assembly includes a deformation member 2 connected to the tool holder body 1, the deformation member 2 being capable of elastic deformation when subjected to an external force along a first direction, thereby causing the cutting tool to shift position along the first direction; a mounting groove is formed between the deformation member 2 and the tool holder body 1; A piezoelectric ceramic fine-tuning component is disposed in the mounting groove, with one end abutting against the main body 1 of the tool holder and the other end abutting against the deformable component 2. It is used to generate deformation when the voltage is applied, thereby squeezing the deformable component 2 and providing an external force along the first direction to the deformable component 2, so that the deformable component 2 generates deformation.

[0020] Specifically, the piezoelectric ceramic fine-tuning component is interference-fitted with the tool holder body 1 and the connecting component. Some deformation occurs in the connecting component upon completion of installation.

[0021] After the tool holder body 1 is connected to the connecting component, the piezoelectric ceramic fine-tuning component can be deformed by applying voltage to it, which in turn squeezes the connecting component and causes it to deform. Since the tool is mounted on the connecting component, the deformation of the connecting component can cause the tool to move slightly, thus achieving the purpose of fine-tuning.

[0022] For example, the tool needs to be along Figure 1 When moving to the left, a positive voltage can be applied to the piezoelectric ceramic trimmer, causing it to expand in the left-right direction. At this time, the force exerted by the expansion of the piezoelectric ceramic trimmer is greater than the force generated by the interference fit of the connecting component, resulting in an increase in the deformation of the connecting component. The tool is then driven by the connecting component along... Figure 1 Move a small distance to the left in the first direction.

[0023] Requires cutting edge Figure 1 When moving to the right, a reverse voltage can be applied to the piezoelectric ceramic trimmer, causing it to contract in the left-right direction. At this time, the force exerted by the piezoelectric ceramic trimmer on the connecting component is less than the force generated by the interference fit of the connecting component, thus reducing the deformation of the connecting component. The tool is driven by the connecting component along... Figure 1 Move a small distance to the right in the first direction.

[0024] In some implementations, the elastic modulus of the deformable element 2 in the connecting assembly is relatively large, requiring a large force to cause even a small deformation of the connecting assembly. During cutting, the cutting tool is subjected to a reaction force. Selecting the deformable element 2 with a large elastic modulus can prevent this reaction force from causing deformation of the connecting assembly, ultimately leading to a decrease in the cutting tool's machining accuracy.

[0025] Based on the above, the structural design is simple and improves the precision of tool fine-tuning.

[0026] Furthermore, the connection component also includes: Connector 3 is fixedly connected to one end of the deformable member 2 away from the main body 1 of the tool holder; the end of the connector 3 away from the deformable member 2 is used to install the tool.

[0027] The deformable component 2 includes: an integrally formed elastic telescopic part 21 and a connecting part 22; The elastic telescopic part 21 is connected to the handle body 1, and a mating groove 23 for connecting to the handle body 1 is provided at one end near the handle body 1; the piezoelectric ceramic fine adjustment component abuts against the bottom of the mating groove 23 at one end near the mating groove 23. The end of the connecting part 22 near the connector 3 is used to connect with the connector 3.

[0028] Specifically, the elastic telescopic part 21 is a ring-shaped curved structure. Its cross-section is wavy, which can produce a small deformation under the action of external force. When subjected to external force, the curvature of the wave shape decreases slightly and the spacing increases slightly, so that the overall length of the deformable part 2 along the first direction increases slightly, thereby achieving the purpose of driving the connecting structure 22, the connecting part 3 and the cutter to make fine adjustments along the first direction.

[0029] For example, under a driving voltage of 500V or 1000V, the maximum displacement of the high-voltage stacked piezoelectric ceramic can reach 130μm; the multiple bending structures of the deformable part 2 all produce corresponding deformation, so that the deformable part 2 as a whole also produces a deformation of 130μm along the first direction, so that the connector 3 and the tool move 130μm along the first direction.

[0030] Further, refer to Figure 2 The mounting groove includes multiple partition spaces; the multiple partition spaces are arranged in a ring array around the axis of the tool holder body 1.

[0031] Therefore, a piezoelectric ceramic fine-tuning component can be installed in each partition space; then, multiple piezoelectric ceramic fine-tuning components can be used to apply force to the deformable component 2, making it easier to drive the deformable component 2 with a larger stiffness coefficient to deform.

[0032] Furthermore, the piezoelectric ceramic fine-tuning component includes: multiple ceramic sheet groups 4; Each of the ceramic tile groups 4 is set in an independent partitioned space; the end of the ceramic tile group 4 near the handle body 1 abuts against the handle body 1, and the end near the deformation member 2 abuts against the deformation member 2.

[0033] Specifically, the working principle of piezoelectric ceramic actuators is based on the piezoelectric effect. Piezoelectric ceramic materials contain tiny polarized domains. When an electric field is applied to the two ends of the piezoelectric ceramic, these polarized domains will align or deflect in an orderly manner under the action of the electric field, thereby causing changes in the macroscopic size of the material and producing deformation.

[0034] When the direction of the electric field changes, the alignment of the polarization domains also changes, and the deformation direction of the material also changes. Take a common stacked piezoelectric ceramic actuator as an example; it consists of multiple stacked piezoelectric ceramic sheets. When a voltage is applied to these ceramic sheets, each sheet undergoes a tiny linear expansion or contraction. The combined expansion and contraction of numerous ceramic sheets can produce a large displacement output.

[0035] Furthermore, the ceramic tile group 4 includes multiple ceramic tiles; the multiple ceramic tiles are arranged along a first direction and are used to drive the cutting tool to move along the first direction through the connecting member 3 when deformation occurs.

[0036] In this embodiment, the piezoelectric ceramic trimmer needs to expand or contract along a first direction; therefore, multiple ceramic pieces are arranged along and perpendicular to the first direction. The expansion or contraction of the multiple ceramic pieces along the first direction under voltage can be superimposed, ultimately causing the tool to produce a displacement of tens of micrometers.

[0037] Multiple ceramic tile groups 4 are respectively arranged in multiple partitioned spaces symmetrically distributed along the axis of the main body 1 of the handle, so as to generate different deformations when different voltages are applied, thereby causing different external forces on different sides of the deformable parts, and thus generating different deformations.

[0038] When different voltages are applied to the two ceramic tile groups, the two ceramic tile groups produce different expansion distances, resulting in different deformations on both sides of the deformable part 2, which in turn causes the tool to tilt relative to the first direction.

[0039] This feature can also be used to fine-tune the tilt angle of the tool. After the tool is installed on the connecting assembly, if it is found that the extension direction of the tool has a small angle with the first direction, the tilt angle of the tool can also be adjusted by applying different voltages to different ceramic tile groups 4.

[0040] In order to realize the function of applying voltage to the piezoelectric ceramic fine-tuning component, the solution provided in this embodiment also includes a controller; The controller is electrically connected to the piezoelectric ceramic trimmer assembly, and the controller is configured to provide voltage to the piezoelectric ceramic trimmer assembly to cause the piezoelectric ceramic trimmer assembly to deform.

[0041] Furthermore, the controller is also configured to: It can independently provide voltage to each of the ceramic tile groups 4; by controlling the voltage value applied to different ceramic tile groups 4, the corresponding ceramic tile groups 4 produce different amounts of expansion and contraction along the first direction, thereby causing the deformable element 2 to produce non-uniform elastic deformation at different positions in the circumferential direction, thereby driving the tool to deflect, so as to change the angle between the tool axis mounted on the connecting member 3 and the first direction; specifically as follows Figure 3 As shown.

[0042] Regarding the deformable component 2 in this embodiment, it preferably includes: an integrally formed elastic telescopic part 21 and a connecting part 22.

[0043] For example, such as Figure 3As shown, the ceramic tile group 4 located above experiences a larger amount of stretching (e.g., when a higher voltage is applied), while the ceramic tile group 4 located below experiences a smaller amount of stretching (e.g., when a lower voltage or zero voltage is applied). The different degrees of deformation of the two ceramic tile groups 4 cause the deformable element 2 to stretch more in the upper region and less in the lower region.

[0044] Specifically, the elastic telescopic part 21 undergoes different deformations on its upper and lower sides, which causes the connecting structure 22, the connecting member 3, and the cutting tool to tilt, ultimately achieving the purpose of changing the angle between the cutting tool axis and the first direction.

[0045] Specifically, the tool holder body 1 has a through hole 5 inside that connects the mounting groove to the external space. The controller is electrically connected to the piezoelectric ceramic fine-tuning component through a wire passing through the through hole 5, thereby achieving the effect of applying voltage to the piezoelectric ceramic fine-tuning component.

[0046] In some embodiments, this example is also equipped with a feedback device for detecting the tool's position. For example, a displacement sensor can monitor the actual position of the tool in real time and feed the tool's position information back to the controller; this allows the controller to adjust the voltage based on the actual position of the tool, causing the piezoelectric ceramic trimmer to change its expansion deformation. This process enables closed-loop control, further improving trimming accuracy.

[0047] Work process: The displacement sensor detects the current position of the tool and calculates the position difference between it and the position where the tool needs to be located; The magnitude and direction of the voltage to be applied to the piezoelectric ceramic trimmer are calculated based on the position difference and the formula for voltage and deformation of the piezoelectric ceramic trimmer. Apply a voltage of the corresponding direction and magnitude to the piezoelectric ceramic trimmer to move the tool to the desired position.

[0048] The formulas for voltage and deformation of piezoelectric ceramic trimmer components are as follows:

[0049] in, d is the expansion length, d is the piezoelectric strain coefficient, and V is the applied voltage.

[0050] In some embodiments, three partition spaces are provided and are evenly distributed along the circumference of the mounting groove; three sets of ceramic tile groups 4 are also provided and are respectively set in the three partition spaces.

[0051] Therefore, different voltages can be applied to the three ceramic chip groups 4, thereby controlling the tool's tilt in any direction. This design utilizes piezoelectric ceramic fine-tuning components to adjust the tool's tilt direction and position. It not only allows for adjustment of the tool's position and tilt angle but also eliminates installation errors between the tool and the connecting components, ensuring the tool is positioned and tilted at the required machining location.

[0052] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but should also cover other technical solutions formed by any combination of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

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