Rotary table locking device and milling machine

Abstract

The utility model discloses a rotary table locking device and a milling machine, the rotary table locking device is arranged on the milling machine and used for braking a rotary table on the milling machine, and the rotary table locking device comprises a braking assembly and a clamping assembly; the brake assembly comprises a dynamic friction plate and a static friction plate, the dynamic friction plate is arranged on the rotary table, and the static friction plate is arranged on a machine body of the milling machine; the clamping assembly is arranged on the machine body and comprises a fixed clamping block, a movable clamping block and a movable friction plate, and the fixed friction plate is located between the fixed clamping block and the movable clamping block; according to the rotary table locking device provided by the utility model, when a milling machine processes a product, the movable clamping block is driven to be close to the fixed clamping block, so that the movable friction plate and the static friction plate are clamped, and the movable friction plate and the static friction plate are quickly close to each other and are tightly attached to each other; friction force between the movable friction plate and the static friction plate is used for rapidly braking the rotary table, the whole braking process is efficient and rapid, and the machining efficiency and precision can be conveniently guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a turntable locking device and a milling machine. Background Technique

[0002] With the vigorous development and transformation and upgrading of China's manufacturing industry, the demand for high-precision and high-efficiency processing equipment is increasing day by day. Among them, four-axis and five-axis linkage machining centers have become the focus of competition in many industries due to their excellent machining capabilities and flexibility. These advanced devices can not only meet the increasingly complex workpiece machining requirements but also greatly promote the development of the manufacturing industry towards intelligence and precision. As an indispensable core component of CNC machine tools, the technological progress and innovation of CNC turntables are directly related to the competitiveness and development level of the entire machine tool industry.

[0003] The introduction of the CNC turntable is an important milestone in machine tool technology innovation. It adds a key rotary coordinate axis to machining centers and CNC milling machines, enabling the machining process to no longer be limited to traditional linear motion but to achieve more complex three-dimensional space machining. By precisely controlling the drives of the fourth and fifth axes, the turntable or dividing head can perform accurate equal division, unequal division, and even continuous rotary movements, which is crucial for machining parts with complex curved surfaces and special-shaped structures. This ability not only greatly broadens the machining field of machine tools but also significantly improves machining efficiency and machining accuracy, meeting the urgent needs of high-end manufacturing industries such as aerospace, automotive manufacturing, and mold processing for precision components.

[0004] However, the performance of the CNC turntable, especially the design of its braking structure, is directly related to the cutting stability, machining efficiency, and final machining accuracy during the workpiece machining process. Currently, most turntables adopt a ring-shaped clamping structure to obtain a relatively large clamping force and improve the reliability of clamping. However, this clamping method has high requirements for machining and also high costs. Content of the Utility Model

[0005] In view of this, the purpose of the present utility model is to overcome the deficiencies in the related technologies. The present utility model provides a turntable locking device and a milling machine.

[0006] The present utility model provides the following technical solutions:

[0007] A turntable locking device is arranged on a milling machine and is used to brake the turntable on the milling machine. The turntable locking device includes a braking component and a clamping component.

[0008] The braking assembly includes a dynamic friction plate and a static friction plate. The dynamic friction plate is arranged on the turntable, and the static friction plate is arranged on the body of the milling machine. The clamping assembly is arranged on the body and includes a fixed clamping block and a movable clamping block. Both the dynamic friction plate and the static friction plate are located between the fixed clamping block and the movable clamping block. When the movable clamping block moves closer to the fixed clamping block, it can drive the dynamic friction plate and the static friction plate to gradually approach and stick tightly to each other.

[0009] As a further improvement of the above technical solution, the dynamic friction plate includes a first dynamic friction plate and a second dynamic friction plate. The first dynamic friction plate and the second dynamic friction plate are arranged in parallel on the turntable, and the static friction plate is located between the first dynamic friction plate and the second dynamic friction plate.

[0010] As a further improvement of the above technical solution, a spacer is provided between the first dynamic friction plate and the second dynamic friction plate.

[0011] As a further improvement of the above technical solution, the distances from the first dynamic friction plate, the spacer, the second dynamic friction plate to the turntable are arranged from near to far and are fixedly installed on the turntable by screws.

[0012] As a further improvement of the above technical solution, the thickness of the spacer is greater than the thickness of the static friction plate.

[0013] As a further improvement of the above technical solution, a telescopic assembly is provided between the end of the movable clamping block away from the fixed clamping block and the body.

[0014] As a further improvement of the above technical solution, the telescopic assembly is a clamping oil cylinder. The movable end of the clamping oil cylinder is connected to the movable clamping block in a matching manner, and the fixed end of the clamping oil cylinder is installed on the body.

[0015] As a further improvement of the above technical solution, the dynamic friction plate, the static friction plate, the fixed clamping block, and the movable clamping block are all correspondingly arranged in a ring shape with respect to the turntable.

[0016] As a further improvement of the above technical solution, the outer ring of the dynamic friction plate is fixedly connected to the turntable, the inner ring of the static friction plate is fixedly connected to the body, and the inner ring of the dynamic friction plate and the outer ring of the static friction plate are arranged in an alternating manner.

[0017] As a further improvement of the above technical solution, the clamping oil cylinder is an annular oil cylinder corresponding to the shape of the movable clamping block.

[0018] As a further improvement of the above technical solution, a spring-back member is provided between the fixed clamping block and the movable clamping block.

[0019] As a further improvement of the above technical solution, the resilient member is a resilient spring.

[0020] As a further improvement of the above technical solution, a plurality of the resilient springs are circumferentially and uniformly distributed relative to the axis of the fixed clamping block.

[0021] As a further improvement of the above technical solution, the fixed clamping block is provided with mounting grooves corresponding to the resilient springs.

[0022] The present utility model further provides a milling machine, including the turntable locking device as described in any one of the above.

[0023] Compared with the related art, the beneficial effects of the present utility model are as follows:

[0024] The turntable locking device provided by the present utility model is installed on a milling machine. During the actual operation of the milling machine, the user first firmly installs the product to be processed on the turntable through a clamping device, and then starts the drive system to make the turntable rotate smoothly along a predetermined trajectory. At this time, the milling cutter on the milling machine can perform fine milling on the rotating product to ensure that each processed surface meets the design requirements. When the processing task is completed or the processing position of the product needs to be adjusted, the user only needs to drive the moving clamping block in the clamping assembly to quickly approach the fixed clamping block to clamp the dynamic friction plate and the static friction plate, so that the dynamic friction plate and the static friction plate quickly fit under the action of a strong clamping force, and the huge friction force generated between the two can quickly and effectively lock the moving state of the turntable, realizing a rapid transition from dynamic to static.

[0025] Moreover, when the turntable locking device performs the locking action, it does not have direct physical contact with the turntable itself. This non-contact locking method greatly reduces the wear of the turntable surface and effectively extends the service life of the equipment. At the same time, it avoids the problem of center of gravity deviation caused by local wear of the turntable, which is crucial for maintaining the stability and processing accuracy during the processing of the milling machine. Therefore, the present utility model not only improves the processing efficiency but also ensures the accuracy and quality of the processed products.

[0026] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Description of the Drawings

[0027] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 Shows a perspective structural schematic diagram of the turntable locking device in an embodiment of the present utility model;

[0029] Figure 2 Shows Figure 1 An enlarged schematic diagram of part A in

[0030] Description of main component symbols:

[0031] 110 - machine body; 120 - turntable; 200 - braking component; 210 - dynamic friction plate; 211 - first dynamic friction plate; 212 - second dynamic friction plate; 213 - spacer gasket; 220 - static friction plate; 300 - clamping component; 310 - fixed clamping block; 320 - moving clamping block; 330 - clamping oil cylinder; 340 - return spring. Specific implementation manner

[0032] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0033] In the description of the present 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", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0035] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0037] Embodiment 1

[0038] Combined with Figure 1 、 Figure 2 As shown, this embodiment provides a turntable locking device which is arranged on a milling machine and is used to brake the turntable 120 on the milling machine. The turntable 120 locking device includes a braking assembly 200 and a clamping assembly 300.

[0039] The braking assembly 200 includes a dynamic friction plate 210 and a static friction plate 220. The dynamic friction plate 210 is arranged on the turntable 120, and the static friction plate 220 is arranged on the body 110 of the milling machine; the clamping assembly 300 is arranged on the body 110. The clamping assembly 300 includes a fixed clamping block 310 and a movable clamping block 320. The dynamic friction plate 210 and the static friction plate 220 are both located between the fixed clamping block 310 and the movable clamping block 320. When the movable clamping block 320 moves closer to the movable clamping block 320, it can drive the dynamic friction plate 210 and the static friction plate 220 to gradually approach and adhere tightly.

[0040] The turntable locking device provided in this embodiment is installed on a milling machine. During actual operation of the milling machine, the user first firmly mounts the product to be processed on the turntable 120 through a clamping device, and then starts the drive system to make the turntable 120 rotate smoothly along a predetermined trajectory. At this time, the milling cutter on the milling machine can perform fine milling on the rotating product to ensure that each processed surface meets the design requirements. When the processing task is completed or the processing position of the product needs to be adjusted, the user only needs to drive the moving clamping block 320 in the clamping assembly 300 to quickly approach the fixed clamping block 310, clamp the dynamic friction plate 210 and the static friction plate 220, so that the dynamic friction plate 210 and the static friction plate 220 quickly fit under the action of a strong clamping force, and the huge frictional force generated between the two can quickly and effectively lock the motion state of the turntable 120, achieving a rapid transition from dynamic to static.

[0041] Moreover, when the turntable 120 locking device performs the locking action, it does not have direct physical contact with the turntable 120 itself. This non-contact locking method greatly reduces the wear on the surface of the turntable 120 and effectively extends the service life of the equipment. At the same time, it avoids the problem of center of gravity deviation caused by local wear of the turntable 120, which is crucial for maintaining the stability and processing accuracy during the milling process.

[0042] In some embodiments, the dynamic friction plate 210 includes a first dynamic friction plate 211 and a second dynamic friction plate 212. The first dynamic friction plate 211 and the second dynamic friction plate 212 are arranged in parallel on the turntable 120, and the static friction plate 220 is located between the first dynamic friction plate 211 and the second dynamic friction plate 212. By setting the first dynamic friction plate 211, the second dynamic friction plate 212, and the static friction plate 220, when the fixed clamping block 310 approaches the fixed clamping block 310, the moving clamping block 320, the second dynamic friction plate 212, the static friction plate 220, the first dynamic friction plate 211, and the fixed clamping block 310 will gradually approach and contact, thus generating 4 contact friction surfaces. The frictional force generated is 4 times that of a single friction surface in a traditional braking device, that is, the corresponding frictional torque is also 4 times, thus generating a very large braking clamping force, thereby achieving a rapid and reliable braking of the turntable 120. Of course, in other embodiments of the present invention, the dynamic friction plate 210 and the static friction plate 220 can also be correspondingly set to other quantities to provide the required braking clamping force.

[0043] In some embodiments, a spacer gasket 213 is provided between the first dynamic friction plate 211 and the second dynamic friction plate 212, and the thickness of the spacer gasket 213 is greater than the thickness of the static friction plate 220. By installing the spacer gasket 213 between the first dynamic friction plate 211 and the second dynamic friction plate 212, direct contact and friction between the first dynamic friction plate 211 and the second dynamic friction plate 212 can be effectively prevented. At the same time, since the thickness of the spacer gasket 213 is designed to be greater than the thickness of the static friction plate 220, when the static friction plate 220 is located between the first dynamic friction plate 211 and the second dynamic friction plate 212, it can ensure that there is a certain gap between the static friction plate 220 and the two, thereby avoiding contact between the static friction plate 220 and them when the turntable 120 drives the first dynamic friction plate 211 and the second dynamic friction plate 212 to rotate, which may otherwise impede the rotation of the turntable 120; ensuring the smooth rotation of the turntable 120.

[0044] In some embodiments, the distances between the first dynamic friction plate 211, the spacer gasket 213, the second dynamic friction plate 212 and the turntable 120 are arranged from near to far, and they are fixedly installed on the turntable 120 by screws. Fixing and installing the first dynamic friction plate 211, the spacer gasket 213, and the second dynamic friction plate 212 by screws facilitates later replacement and maintenance.

[0045] In some embodiments, a telescopic assembly is provided between the end of the movable clamping block 320 away from the fixed clamping block 310 and the machine body 110. By providing the telescopic assembly, rapid movement of the movable clamping block 320 can be achieved, thereby improving the braking efficiency of this embodiment.

[0046] In some embodiments, the telescopic assembly is a clamping oil cylinder 330. The movable end of the clamping oil cylinder 330 is cooperatively connected with the movable clamping block 320, and the fixed end of the clamping oil cylinder 330 is installed on the machine body 110; the clamping oil cylinder 330 is a device that realizes linear motion through hydraulic or pneumatic drive, facilitating effective clamping of the dynamic friction plate 210 and the static friction plate 220; of course, in other embodiments of the present invention, the telescopic assembly may also adopt other structures capable of driving the movable clamping block 320.

[0047] In some embodiments, the dynamic friction plate 210, the static friction plate 220, the fixed clamping block 310, and the movable clamping block 320 are all correspondingly provided as annular with respect to the turntable 120, so as to provide a larger friction surface while avoiding the middle part at the lower end of the turntable 120 and ensuring the normal transmission connection between the turntable 120 and its drive assembly.

[0048] In some embodiments, the outer ring of the dynamic friction plate 210 is fixedly connected to the turntable 120, the inner ring of the static friction plate 220 is fixedly connected to the machine body 110, and the inner ring of the dynamic friction plate 210 and the outer ring of the static friction plate 220 are arranged in an interleaved manner; this interleaved layout not only optimizes the space utilization, but also ensures that the clamping assembly 300 and the turntable 120 do not interfere with each other, making the positions of each component more reasonable.

[0049] In some embodiments, the clamping oil cylinder 330 is configured as an annular oil cylinder corresponding to the shape of the moving clamping block 320. This customized design not only ensures that the oil cylinder can closely fit the moving clamping block 320 during operation, but also significantly improves the uniformity of the thrust distribution of the oil cylinder on the moving clamping block 320. The uniform force application of the annular oil cylinder effectively avoids the phenomenon of local stress concentration, enabling the moving clamping block 320 to move smoothly and evenly when subjected to the thrust, and thus ensuring that the acting forces on the related components such as the dynamic friction plate 210, the static friction plate 220, and the fixed clamping block 310 are also more balanced. The balanced force distribution is crucial for the performance of the entire system. It promotes the more even generation of frictional force when the dynamic friction plate 210 contacts the static friction plate 220, avoiding the problem of accelerated wear caused by excessive local frictional force. At the same time, this uniform stress state also helps to reduce the vibration and noise during the operation of the system, improving the overall working stability and reliability. In the long run, by optimizing the design of the clamping oil cylinder 330 to make the acting forces between the components more even, the service lives of key components such as the dynamic friction plate 210, the static friction plate 220, the fixed clamping block 310, and the moving clamping block 320 can be significantly extended.

[0050] In some embodiments, in order to improve the response speed and operation efficiency of the device, a resilient member is particularly designed between the fixed clamping block 310 and the moving clamping block 320. This design aims to optimize the reset process after the braking operation is completed. Specifically, when the movable end of the clamping oil cylinder 330 retracts after completing the braking task of the turntable 120, the resilient member comes into play. It utilizes the elastic potential energy stored in itself to quickly and smoothly push the moving clamping block 320 in a direction away from the fixed clamping block 310, thereby achieving the rapid reset of the moving clamping block 320. The introduction of the resilient member not only significantly shortens the reset time, but also ensures the accuracy and reliability of the reset action. It effectively avoids problems such as equipment jamming and increased wear that may be caused by untimely or incomplete reset, further improving the overall performance and durability of the device. At the same time, this design also simplifies the reset operation process, reduces the operation difficulty and maintenance cost, and brings a more convenient and efficient user experience.

[0051] In some embodiments, the resilient member is specifically selected as the resilient spring 340. As a common elastic element, the resilient spring 340 is known for its good elasticity and restoring force, and is inexpensive and easy to maintain.

[0052] In some embodiments, a plurality of the resilient springs 340 are circumferentially and uniformly distributed relative to the axis of the fixed clamping block 310, facilitating the provision of an average restoring force for the movable clamping block 320.

[0053] In some embodiments, in order to ensure that the resilient spring 340 can be stably and accurately installed on the fixed clamping block 310 so as to exert its resilient effect when needed, an installation groove matching the shape and size of the resilient spring 340 is provided on the fixed clamping block 310. This design detail not only improves the convenience of installation but also ensures the stability and reliability of the resilient spring 340 after installation.

[0054] Embodiment 2

[0055] The present utility model also provides a milling machine. According to the different workpieces to be machined, the milling machine can be divided into different specifications and types. Specifically, the milling machine referred to in this embodiment can be any device having a turntable 120 and capable of milling workpieces, including a machine body 110 and the turntable locking device described in Embodiment 1. The turntable locking device is installed on the machine body 110, and all the beneficial effects of the milling machine having the turntable locking device are not described in detail herein.

[0056] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0057] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A turntable locking device is provided on a milling machine and is used to brake the turntable (120) on the milling machine. It is characterized in that, The turntable locking device includes: A braking component (200), the braking component (200) includes a dynamic friction plate (210) and a static friction plate (220), the dynamic friction plate (210) is arranged on the turntable (120), and the static friction plate (220) is arranged on the body (110) of the milling machine; A clamping component (300), arranged on the body (110), the clamping component (300) includes a fixed clamping block (310) and a movable clamping block (320), the dynamic friction plate (210) and the static friction plate (220) are both located between the fixed clamping block (310) and the movable clamping block (320), and the movable clamping block (320) approaching the movable clamping block (320) can drive the dynamic friction plate (210) and the static friction plate (220) to gradually approach and adhere tightly.

2. The turntable locking device according to claim 1, wherein The dynamic friction plate (210) includes a first dynamic friction plate (211) and a second dynamic friction plate (212), the first dynamic friction plate (211) and the second dynamic friction plate (212) are arranged in parallel on the turntable (120), and the static friction plate (220) is located between the first dynamic friction plate (211) and the second dynamic friction plate (212).

3. The turntable locking device according to claim 2, characterized in that, A spacer (213) is arranged between the first dynamic friction plate (211) and the second dynamic friction plate (212).

4. The turntable locking device according to claim 3, characterized in that, The thickness of the spacer (213) is greater than the thickness of the static friction plate (220).

5. The turntable locking device according to claim 1, characterized in that, An expansion and contraction component is arranged between the end of the movable clamping block (320) far from the fixed clamping block (310) and the body (110).

6. The turntable locking device according to claim 5, characterized in that, The expansion and contraction component is a clamping oil cylinder (330), the movable end of the clamping oil cylinder (330) is connected with the movable clamping block (320) in a matching way, and the fixed end of the clamping oil cylinder (330) is installed on the body (110).

7. The turntable locking device according to claim 1, characterized in that, The dynamic friction plate (210), the static friction plate (220), the fixed clamping block (310), and the movable clamping block (320) are all correspondingly arranged in a ring shape with the turntable (120).

8. The turntable locking device according to any one of claims 1 to 7, characterized in that, A rebound component is arranged between the fixed clamping block (310) and the movable clamping block (320).

9. The turntable locking device according to claim 8, wherein, The rebound component is a rebound spring (340).

10. A milling machine, characterized in that, It includes the turntable locking device according to any one of claims 1 to 9.

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