Large milling head clamping and positioning device

Abstract

The invention discloses a large milling head clamping and positioning device, and belongs to the technical field of machine tools. The device comprises a milling head, a fixing plate is fixedly connected to a connecting plate of the milling head, a clamping plate I and a clamping plate II are arranged on the two sides of the fixing plate respectively, and the clamping plates are located between the fixing plate and the connecting plate; a clamping cylinder is mounted on one side of the clamping plate I and in the milling head, and the clamping cylinder is tightly attached to the clamping plate I; a signal switch is arranged on the side far away from the clamping cylinder and the side of the connecting plate, and an encoder is arranged below the signal switch and at the tail end of a main shaft of the milling head; an annular block is installed outside the encoder, and a collision block is installed above the annular block. The device has the advantages of being simple in structure, convenient to adjust and stable in performance.

Description

Technical Field

[0001] This invention relates to a clamping and positioning device for a large milling head, belonging to the field of machine tool technology. Background Technology

[0002] As a core component of machine tools such as boring and milling machines, turning and milling machines, and machining centers, the milling head's high speed, high precision, stability, and reliability are key indicators for evaluating the machine tool's manufacturing level. However, existing milling head limiting mechanisms generally suffer from complex structural designs, leading to exceptionally difficult adjustment processes in practical applications. This structural complexity not only increases the difficulty of manufacturing and maintenance but also easily causes positioning deviations, thereby affecting machining accuracy and the stability of machine tool operation. Furthermore, due to the cumbersome adjustment operations, operators often need to spend a significant amount of time on repeated calibrations, reducing production efficiency and increasing operating costs. Therefore, existing technologies urgently need improvement to address these issues. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a large milling head clamping and positioning device, which has the advantages of simplified structure, easy adjustment, and improved positioning accuracy and stability.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a large milling head clamping and positioning device, including a milling head, a fixed plate fixedly connected to the connecting plate of the milling head, a clamping plate I and a clamping plate II respectively provided on both sides of the fixed plate, the clamping plate being located between the fixed plate and the connecting plate; on one side of the clamping plate I, a clamping cylinder is installed in the milling head, the clamping cylinder is in close contact with the clamping plate I, the hydraulic cylinder is connected to the oil supply line, and the oil supply line is connected to the external hydraulic system.

[0005] Furthermore, on the side of the connecting plate away from the clamping cylinder, a signal switch is installed. Below the signal switch, an encoder is installed at the end of the milling head spindle. An annular block is installed outside the encoder, and a striking block is installed above the annular block.

[0006] Furthermore, clamping plate I and clamping plate II are respectively tightly attached to the fixing plate.

[0007] Furthermore, the clamping cylinder, clamping plate I, fixing plate, and clamping plate II are all annular structures, and the spindle of the milling head passes through the central holes of the clamping cylinder, clamping plate I, fixing plate, and clamping plate II.

[0008] Furthermore, both clamping plate I and clamping plate II are in the shape of a boss. Clamping holes are provided on the plate body at the circumferential edge of clamping plate I and clamping plate II. Each clamping hole on clamping plate I corresponds to each clamping hole on clamping plate II. The protruding part of clamping plate II is inserted into the central hole of clamping plate I. Clamping plate I and clamping plate II are clamped together on the connecting plate of the milling head.

[0009] The beneficial effects of this invention are as follows: This application provides a large milling head clamping and positioning device, including a milling head, a fixed plate fixedly connected to the connecting plate of the milling head, a clamping plate I and a clamping plate II respectively provided on both sides of the fixed plate, and the clamping plate II located between the fixed plate and the connecting plate on one side of the clamping plate I; a clamping cylinder is installed in the milling head, the clamping cylinder is in close contact with the clamping plate I, the hydraulic cylinder is connected to the oil supply line, and the oil supply line is connected to the external hydraulic system. Through the synergistic action of the fixed plate, the clamping plate and the hydraulic system, efficient and reliable clamping and positioning are achieved, which has the advantages of simplified structure, easy adjustment, and improved positioning accuracy and stability. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a schematic diagram of the structure of the present invention.

[0012] Figure 2 yes Figure 1 Enlarged diagram of point A.

[0013] Figure 3 This is a cross-sectional schematic diagram of the clamping plate II of the present invention.

[0014] Figure 4 This is a cross-sectional schematic diagram of the clamping plate I of the present invention.

[0015] Figure 5 This is a schematic diagram of the assembly of clamping plate I and clamping plate II of the present invention.

[0016] Figure 6 This is a cross-sectional schematic diagram of the annular block of the present invention.

[0017] Figure 7 yes Figure 1 Enlarged diagram of point B.

[0018] Numbering on the map: 1. Clamping cylinder, 2. Clamping plate I, 3. Fixing plate, 4. Clamping plate II, 5. Signal switch, 6. Impact block, 7. Ring block, 8. Encoder, 9. Milling head, 901. Connecting plate, 902. Spindle, 10. Oil supply line. Detailed Implementation

[0019] Traditional milling head limiting mechanisms generally suffer from complex structures and difficult adjustments in practical applications. These problems not only increase the manufacturing cost and maintenance difficulty of the equipment, but also limit the performance and reliability of machine tools in high-speed, high-precision operations, making it difficult to meet the demands of modern industry for efficient and stable machining.

[0020] In response, this invention proposes a large milling head clamping and positioning device. A fixing plate 3 is fixedly connected to the connecting plate 901 of the milling head 9, and clamping plates I2 and II4 are respectively arranged on both sides of the fixing plate 3. The clamping plate II4 is located between the fixing plate 3 and the connecting plate 901. A clamping cylinder 1 is installed in the milling head 9, so that the clamping cylinder 1 is tightly attached to the clamping plate I2. The device is connected to an external hydraulic system via an oil supply line 10, thereby effectively simplifying the structure of the milling head limiting mechanism and facilitating adjustment.

[0021] For ease of understanding, the following explains some key terms in this embodiment: Milling head 9: This usually refers to the component in a machine tool used to mount and drive the cutting tool for rotary cutting. It integrates the spindle, transmission mechanism, etc., and is the core component for realizing the cutting function.

[0022] Connecting plate 901: As part of the milling head 9, it is typically used to connect or fix with other structural components, providing an installation interface and support for other parts.

[0023] Fixed plate 3: In this embodiment, the fixed plate 3 is designed to provide stable support and positioning reference. Through its fixed connection with the connecting plate 901, it provides a stable mounting platform for the other components of the clamping mechanism.

[0024] Clamping plate I2 and clamping plate II4: These two plates are key force-bearing components in the clamping mechanism. Under the action of clamping cylinder 1, they apply clamping force to the milling head 9 or related components to achieve positioning and fixation.

[0025] Clamping cylinder 1: As a hydraulic actuator, clamping cylinder 1 receives pressure oil from the external hydraulic system to generate thrust or pull, thereby driving clamping plate I2 and clamping plate II4 to perform clamping or releasing operations.

[0026] Oil inlet line 10: A pipeline used to transport hydraulic oil, which guides the pressure oil generated by the external hydraulic system to the clamping cylinder 1 and is the channel for hydraulic power transmission.

[0027] External hydraulic system: refers to a collection of devices that provide hydraulic power, including hydraulic pumps, oil tanks, valves, filters, etc., used to generate, control and regulate the pressure and flow of hydraulic oil to drive the clamping cylinder 1 to work.

[0028] This embodiment provides a large milling head clamping and positioning device, the specific structure and working principle of which are as follows: A fixing plate 3 is fixedly connected to the connecting plate 901 of the milling head 9. The fixing plate 3 can be connected to the connecting plate 901 in various ways, such as by bolting, riveting, or welding. As one implementation, the fixing plate 3 can be designed to form a stable connection by passing multiple bolts through its preset holes and screwing them into the threaded holes of the connecting plate 901.

[0029] A clamping plate I2 and a clamping plate II4 are respectively provided on both sides of the fixing plate 3. These clamping plates can be simply placed on both sides of the fixing plate 3, or initially positioned by a guide structure. For example, clamping plates I2 and II4 can be designed to have a structure that mates with the edge of the fixing plate 3 to ensure that it can be correctly positioned during initial installation.

[0030] On one side of clamping plate I2, clamping plate II4 is positioned between fixing plate 3 and connecting plate 901. This positioning relationship can be achieved through various structures. For example, the connecting plate 901 can be provided with a groove or limiting structure for accommodating clamping plate II4, so that clamping plate II4 can be accurately inserted and positioned between fixing plate 3 and connecting plate 901 during installation.

[0031] A clamping cylinder 1 is installed in the milling head 9. The clamping cylinder 1 can be installed by bolting it to the internal structure of the milling head 9, or by using clamps, pressure plates, or other means. For example, the clamping cylinder 1 can be designed with a flange structure and connected to the mounting base inside the milling head 9 through bolt holes on the flange.

[0032] The clamping cylinder 1 is tightly pressed against the clamping plate I2. This tight contact can be achieved by the piston rod of the clamping cylinder 1 directly contacting the surface of the clamping plate I2, or by placing a force-transmitting pad between the two to transmit the clamping force. In one implementation, the piston rod of the clamping cylinder 1 presses directly against the surface of the clamping plate I2 when it extends, thereby generating a clamping effect.

[0033] The clamping cylinder 1 is connected to the oil supply line 10. The oil supply line 10 is connected to the oil port of the clamping cylinder 1 to realize the input and output of hydraulic oil. This connection can be achieved by means of threaded joint, quick joint, or welding. For example, the oil port of the clamping cylinder 1 can be designed with an internal thread structure, and the end of the oil supply line 10 has an external threaded joint, which achieves a sealed connection by tightening.

[0034] The oil inlet line 10 is connected to an external hydraulic system. The other end of the oil inlet line 10 is connected to the output port of the external hydraulic system to receive pressurized oil from the hydraulic system. This connection can also be made using threaded joints, flange connections, or quick-connect couplings to ensure smooth hydraulic oil transmission and system sealing.

[0035] The large milling head clamping and positioning device provided in this embodiment effectively solves the problems of complex structure and difficult adjustment of traditional milling head limiting mechanisms by optimizing the layout of the clamping mechanism and the hydraulic control method. Through the coordinated action of the fixing plate 3, clamping plate I2, clamping plate II4, and clamping cylinder 1, the device achieves stable clamping and precise positioning of the milling head 9, significantly improving the stability and reliability of the milling head during operation, while simplifying the installation and maintenance process and reducing the difficulty of operation.

[0036] In some of the solutions described above in this application, a clamping and positioning device is proposed to fix the milling head. However, in this process, there is a lack of effective position detection and limiting mechanism, which makes it difficult to adjust the position of the milling head and affects the accuracy and reliability of the machine tool.

[0037] In this regard, this application further proposes a large milling head clamping and positioning device, on the side away from the clamping cylinder 1, on the side of the connecting plate 901, a signal switch 5 is installed, and below the signal switch 5, an encoder 8 is installed at the end of the spindle 902 of the milling head 9; an annular block 7 is installed on the outside of the encoder 8, and a striking block 6 is installed above the annular block 7.

[0038] Signal switch 5 is a sensor used to detect a specific position or state. Its function is to emit a corresponding signal when the spindle 902 of the milling head 9 moves to a preset position, thereby achieving position detection and limiting. Signal switch 5 can be implemented in various forms; for example, it can be a mechanical limit switch that triggers the signal through physical contact; or it can be a non-contact sensor, such as an inductive proximity switch, photoelectric switch, or magnetic switch, which outputs a signal by detecting metal objects, light beam obstruction, or changes in magnetic fields. Encoder 8 is a device that converts mechanical motion (such as rotation or linear displacement) into electrical signals. Its function is to accurately measure the rotation angle or linear displacement of the spindle 902 of the milling head 9, thereby providing high-precision position feedback. The implementation of encoder 8 includes, but is not limited to: incremental encoders, which obtain the displacement by counting pulse signals output by an external controller; or absolute encoders, which directly output digital codes corresponding one-to-one with the current position, directly indicating position information. Furthermore, encoder 8 can be a photoelectric encoder, using gratings and photoelectric elements for detection; or it can be a magnetic encoder, using changes in magnetic fields for detection. Ring block 7 is a component with a ring-shaped structure. Its function is to provide a stable mounting base for the encoder 8 and protect it, while also providing support for the installation of the impact block 6. The annular block 7 can be made of various materials and structures. For example, it can be made of metal materials (such as aluminum alloy or stainless steel) into an annular sleeve and fixed to the spindle 902 by bolts or press fit; it can also be made of engineering plastics to achieve lightweight and provide a certain degree of shock absorption. The impact block 6 is a mechanical component used to trigger the signal switch 5. Its function is to make mechanical contact or sense with the signal switch 5 when the spindle 902 of the milling head 9 moves to a preset limit position, thereby triggering the signal switch 5 to emit a signal. The impact block 6 can be implemented in the following ways: a fixed protrusion whose size and position are preset and precisely match the signal switch 5; or an adjustable bolt, by adjusting the extension length of the bolt to fine-tune the position of the trigger signal switch 5 to adapt to different limit requirements.

[0039] Through the above technical solution, a signal switch 5 is installed on the connecting plate 901 on the side away from the clamping cylinder 1. Below the signal switch 5, an encoder 8 is installed at the end of the spindle 902 of the milling head 9. An annular block 7 is installed outside the encoder 8, and a stop block 6 is installed above the annular block 7. This application achieves accurate detection and effective limiting of the position of the milling head 9. Specifically, the encoder 8 can monitor the rotation or displacement of the spindle 902 of the milling head 9 in real time and with high precision, providing continuous position feedback and providing a data basis for the accurate positioning of the milling head 9. At the same time, the cooperation between the stop block 6 and the signal switch 5 can trigger the signal switch 5 to issue a limit signal when the milling head 9 moves to the preset limit position, thereby achieving effective control of the movement range of the milling head 9. This structural design combines position detection with mechanical limiting, avoiding the problem of difficult milling head position adjustment in traditional solutions, significantly improving the positioning accuracy and reliability of the milling head 9, simplifying the operation process, and ensuring the stability and processing quality of the machine tool during the machining process.

[0040] In some of the solutions described above in this application, clamping plates I and II are proposed for clamping the fixing plate. However, during implementation, there may be a problem that the clamping plates and the fixing plate are not tightly fitted, resulting in insecure clamping or inaccurate positioning. To address this, this application further proposes that clamping plates I 2 and II 4 be tightly fitted to the fixing plate 3.

[0041] Specifically, clamping plates I2 and II4 are structural components used to apply clamping force to the fixed plate 3. During clamping, they directly contact the fixed plate 3, transmitting the force generated by the clamping cylinder 1, thereby achieving the positioning and fixation of the milling head 9. For example, clamping plates I2 and II4 can be made of high-strength alloy steel or cast iron, with their surfaces finely machined, such as ground or scraped, to ensure high flatness and roughness of the contact surfaces with the fixed plate 3, thus achieving a tight fit. Alternatively, they can be made of materials with a certain degree of elasticity, such as polymer composite materials or metal plates with elastic pads, to better adapt to the microscopic unevenness of the fixed plate 3 surface during clamping, further improving the tightness of the fit. The fixed plate 3 is a key component on the milling head 9 connecting plate 901. As the direct force-bearing surface for the clamping force applied by clamping plates I2 and II4, it plays a role in bearing and transmitting force during clamping, and forms a clamping fit with clamping plates I2 and II4. For example, the fixing plate 3 can be made of the same material as the connecting plate 901 and is firmly connected to the connecting plate 901 by welding, bolting, or integral casting. Its surface in contact with clamping plates I2 and II4 also requires high-precision machining. Alternatively, to enhance wear resistance and clamping effect, the surface of the fixing plate 3 can undergo special treatment, such as carburizing and quenching, hard chrome plating, or ceramic coating, to improve its surface hardness and wear resistance while maintaining good flatness. The aforementioned "tight fit" means that there are no obvious gaps between clamping plates I2 and II4 and the fixing plate 3, and the contact surfaces maintain a tight contact to ensure that the clamping force is transmitted evenly and effectively, avoiding uneven clamping force, unstable positioning, or vibration caused by gaps. This can be achieved through precise machining tolerance control, ensuring that the mating surfaces of clamping plates I2, II4, and the fixing plate 3 have extremely high flatness and parallelism. In addition, a thin, elastic buffer material, such as a highly elastic polymer film or a metal gasket, can be placed between clamping plate I2 and clamping plate II4 and fixing plate 3. These materials can fill tiny gaps when under pressure, further enhancing the tightness of the fit and absorbing some vibration.

[0042] Through the above technical solution, clamping plate I2 and clamping plate II4 are clearly defined to be tightly attached to the fixed plate 3. This means that when the clamping cylinder 1 applies clamping force, clamping plate I2 and clamping plate II4 can directly and comprehensively contact the corresponding surfaces of the fixed plate 3, thereby ensuring that the clamping force can be evenly distributed across the entire contact surface. This tight fit avoids problems such as uneven clamping force, local stress concentration, or insecure clamping caused by gaps between contact surfaces. Therefore, this device can provide a more stable and reliable clamping effect, effectively preventing the milling head 9 from loosening or shifting during operation, thereby significantly improving the positioning accuracy and overall operational stability of the milling head 9.

[0043] In some of the solutions described above in this application, a clamping device is proposed to fix the milling head. However, in the process of its implementation, irregular part shapes may lead to complex assembly, insufficient positioning accuracy, or affect the stability of spindle operation.

[0044] In this regard, this application further proposes that the clamping cylinder 1, clamping plate I2, fixing plate 3 and clamping plate II4 are all annular structures, and the spindle 902 of the milling head 9 passes through the center holes of the clamping cylinder 1, clamping plate I2, fixing plate 3 and clamping plate II4.

[0045] Specifically, clamping cylinder 1, clamping plate I 2, fixing plate 3, and clamping plate II 4 are designed as annular structures with a central hole. This uniform geometry facilitates the standardization and modularization of components, simplifying the manufacturing and assembly process. These annular components can be made of high-strength alloy steel or cast iron and manufactured through processes such as precision turning, milling, or casting to ensure dimensional accuracy and structural strength. Alternatively, composite materials, such as carbon fiber reinforced polymers, can be used and prepared through compression molding or filament winding to reduce component weight while maintaining strength.

[0046] Simultaneously, the spindle 902 of the milling head 9 passes sequentially through the center holes of the clamping cylinder 1, clamping plate I 2, fixing plate 3, and clamping plate II 4 along its axial direction. This design ensures that all related components can achieve precise concentric alignment during installation. The center holes of each component can be machined using high-precision boring or grinding processes to ensure that the fit clearance with the spindle 902 is within the allowable tolerance range, thereby guaranteeing concentricity. To further optimize the smooth operation of the spindle 902, wear-resistant bushings or precision bearings can be installed on the inner wall of the center holes to reduce friction and provide additional support.

[0047] Through the above technical solution, the clamping cylinder 1, clamping plate I 2, fixing plate 3, and clamping plate II 4 are designed as a ring-shaped structure, and the spindle 902 of the milling head 9 passes through the central holes of these components. This effectively solves the problems of assembly complexity and insufficient positioning accuracy caused by irregular component shapes in the prior art. This unified ring-shaped structure simplifies the manufacturing and assembly process of the components, reduces space occupation, and enhances the overall structural strength. More importantly, the spindle 902 passing through the central holes of each component ensures precise concentric alignment of all clamping and positioning components with the spindle 902. This precise alignment significantly improves the positioning accuracy of the milling head 9, minimizes the possible eccentricity and imbalance of the spindle 902 during high-speed rotation, and thus effectively reduces vibration and runout. Ultimately, this greatly improves the smoothness and reliability of the operation of the spindle 902 of the milling head 9, thereby improving machining accuracy and equipment lifespan.

[0048] In some of the solutions mentioned above in this application, clamping plate I and clamping plate II are proposed to achieve clamping and positioning. However, in the process of implementation, the assembly accuracy is insufficient and the adjustment is difficult, resulting in unstable positioning or low efficiency.

[0049] In response, this application further proposes an improved clamping and positioning device, wherein clamping plate I2 and clamping plate II4 are both boss-shaped, and clamping holes are provided on the plate body at the circumferential edge of clamping plate I2 and clamping plate II4. Each clamping hole on clamping plate I2 corresponds to each clamping hole on clamping plate II4. The protruding part of clamping plate II4 is inserted into the center hole of clamping plate I2, and clamping plate I2 and clamping plate II4 are clamped together on the connecting plate 901 of milling head 9.

[0050] Specifically, both clamping plate I2 and clamping plate II4 adopt a boss-shaped design. A boss shape refers to a protrusion or recess structure on a part or the whole of the plate that is higher or lower than its surrounding plane, designed to provide a self-aligning or limiting function, facilitating precise mating and connection between two parts. For example, the boss shape can be a cylindrical, conical, or polygonal geometric protrusion, and its height and diameter can be designed according to the actual clamping force requirements and space constraints; or, the boss shape can be designed with a beveled or chamfered structure to further guide the insertion of mating parts and reduce jamming during assembly.

[0051] Meanwhile, clamping plates I2 and II4 both have mating holes on their circumferential edges. These mating holes are used to achieve precise alignment and connection between two components, typically for inserting pins, bolts, or other positioning elements to ensure accurate relative positioning of the components during assembly. For example, the mating hole can be a through hole for a bolt or locating pin to pass through and be secured with a nut or clip; alternatively, it can be a blind hole for inserting a locating pin and achieving positioning through friction or fit tolerances, while maintaining the flatness of the plate surface.

[0052] Based on this, the mating holes on clamping plate I2 correspond to the mating holes on clamping plate II4. This correspondence means that the two sets of mating holes are precisely matched in spatial position, so that when clamping plate I2 and clamping plate II4 are engaged, their mating holes can be aligned, allowing positioning or fasteners to pass through smoothly. This is the key to achieving precise assembly and positioning. This can be achieved by ensuring that the center distance, hole diameter, and distribution angle of the two sets of mating holes are completely consistent through high-precision machining, or by using a unified CAD model or template for hole layout during the design phase.

[0053] Furthermore, the protruding portion of clamping plate II4 is inserted into the center hole of clamping plate I2. This insertion mechanism is the core of achieving self-positioning between the two clamping plates and enhancing connection stability. The protruding portion of clamping plate II4, as a positioning feature, forms a tight fit with the center hole of clamping plate I2, thereby restricting the relative movement of the two plates in the radial direction. For example, a clearance fit or transition fit can be used between the protruding portion and the center hole to facilitate assembly while providing sufficient positioning accuracy; alternatively, the protruding portion can be designed with a chamfered or tapered structure to guide its smooth insertion into the center hole, reducing assembly difficulty.

[0054] Finally, clamping plate I2 and clamping plate II4 are together secured to the connecting plate 901 of the milling head 9. "Together secured" means that clamping plate I2 and clamping plate II4 are connected and fixed to the connecting plate 901 of the milling head 9 as a whole in some way. This connection method aims to ensure that the clamping plate assembly can be firmly attached to the connecting plate and bear the working load when the milling head is working. Specifically, fasteners such as bolts and screws can be passed through the engagement holes of clamping plate I2 and clamping plate II4 and screwed into the threaded holes on the connecting plate 901 for fixation; alternatively, clamping plate I2 and clamping plate II4 can be formed into a whole by welding, riveting, or bonding, and then connected to the connecting plate 901.

[0055] Through the above technical solution, the boss shape design of clamping plate I2 and clamping plate II4, and the fitting insertion of their protruding parts with the central hole, realize the self-positioning function between the two clamping plates, greatly simplifying the assembly process and improving assembly accuracy. Simultaneously, the mating holes set at the circumferential edges and their precise correspondence further ensure the accurate alignment of clamping plate I2 and clamping plate II4 during assembly, effectively reducing errors caused by inaccurate positioning. Finally, clamping plate I2 and clamping plate II4 together clamp onto the connecting plate 901 of the milling head 9, forming a structurally stable and precisely positioned whole. This significantly improves the assembly efficiency and positioning stability of the large milling head clamping and positioning device, solving the problems of insufficient assembly accuracy and difficulty in adjustment in existing technologies. This allows the milling head 9 to maintain a more stable clamping state during operation, improving the operational reliability of the equipment. Example 1

[0056] The core of the large milling head clamping and positioning device lies in its integrated clamping and positioning mechanism. A fixed plate 3 is fixedly connected to the connecting plate 901 of the milling head 9. Clamping plate I2 and clamping plate II4 are respectively arranged on both sides of the fixed plate 3. Clamping plate II4 is located between the fixed plate 3 and the connecting plate 901, while clamping plate I2 is located on the other side of the fixed plate 3. This layout forms a "sandwich" clamping structure. In order to achieve clamping, a clamping cylinder 1 is installed inside the milling head 9. The clamping cylinder 1 is in close contact with the clamping plate I2. The clamping cylinder 1 is connected to the external hydraulic system through the oil supply line 10. When it is necessary to clamp the milling head 9, the external hydraulic system supplies oil to the clamping cylinder 1 through the oil supply line 10, causing the clamping cylinder 1 to extend and thus push the clamping plate I2.

[0057] During clamping, clamping plates I2 and II4 are tightly pressed against the fixed plate 3. The hydraulic thrust applied by the clamping cylinder 1 generates strong friction between clamping plates I2, the fixed plate 3, and clamping plates II4 and the connecting plate 901, thereby firmly clamping the milling head 9 in the predetermined position. To accommodate the rotation requirements of the milling head 9 spindle 902, clamping cylinder 1, clamping plate I2, fixed plate 3, and clamping plate II4 are all designed as annular structures. The milling head 9 spindle 902 can smoothly pass through the central holes of these annular components, ensuring that the clamping mechanism does not interfere with the normal operation of the spindle 902.

[0058] To further improve positioning accuracy and stability, both clamping plate I2 and clamping plate II4 are designed with bosses. Clamping holes are provided on the circumferential edges of both clamping plates I2 and II4, with each clamping hole on clamping plate I2 corresponding to one on clamping plate II4. During clamping, the protruding portion of clamping plate II4 engages with the central hole of clamping plate I2, allowing both clamping plates I2 and II4 to clamp together on the connecting plate 901 of the milling head 9. This boss shape and clamping hole design not only provides strong clamping force but also achieves precise radial positioning through mechanical cooperation, effectively preventing minor displacement or rotation of the milling head 9 after clamping and solving the problem of inaccurate positioning in traditional mechanisms.

[0059] During the positioning process of the milling head 9, to achieve automation and high-precision feedback, a signal switch 5 is installed on the connecting plate 901 on the side away from the clamping cylinder 1. Below the signal switch 5, an encoder 8 is installed at the end of the spindle 902 of the milling head 9. An annular block 7 is installed on the outside of the encoder 8, and a stop block 6 is installed above the annular block 7. When the milling head 9 moves to the preset clamping position, the encoder 8 at the end of the spindle 902 provides precise rotational position information. At the same time, the stop block 6 touches the signal switch 5, triggering a signal indicating that the milling head 9 has reached the target position. At this time, after receiving the signal, the external hydraulic system immediately drives the clamping cylinder 1 to perform the clamping operation.

[0060] Compared to existing milling head limiting mechanisms that are complex in structure and difficult to adjust, this embodiment achieves rapid and high-precision clamping and positioning of the milling head 9 through the synergistic action of the hydraulic clamping cylinder 1, multi-layer clamping plates 2 and 4, and fixing plate 3, combined with a ring-shaped structure to accommodate the passage of the spindle 902, and precise mechanical fit between the boss shape and the mating hole. Furthermore, the introduction of signal switch 5 and encoder 8 provides automated positioning feedback, simplifies the operation process, and reduces the need for manual adjustments. This integrated design makes the entire device compact, easy to operate, and significantly improves the efficiency and accuracy of milling head clamping and positioning.

[0061] During use, after the milling head 9, which acts as a rotating mechanism, is indexed, a clamping device is needed to lock it in place to ensure stable operation during machining. The external hydraulic system supplies hydraulic oil to the clamping cylinder 1 via the oil supply line 10. This hydraulic oil lifts the clamping cylinder 1, causing it to act on the clamping plate Ⅰ2, which in turn deforms the clamping plates 2 and 4, firmly locking the fixing plate 3 in place. The milling head 9, which serves as the rotating mechanism, is clamped and integrated into a single unit, resulting in greater rigidity and stability during machining. Furthermore, to ensure precise indexing, this large milling head clamping and positioning device is equipped with an encoder 8. During operation, the encoder 8 provides accurate feedback on the rotation angle. To ensure rotational safety, an annular block 7 is attached to the outside of the encoder 8, and a stop block 6 is mounted on the annular block 7. When the spindle 902 of the milling head 9 reaches its limit position, it contacts the signal switch 5, which then generates a signal to stop operation. Through these multiple mechanisms, the milling head 9 operates more stably and reliably, achieving high machining accuracy and efficiency.

[0062] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A large milling head clamping and positioning device, comprising a milling head (9), characterized in that: A fixed plate (3) is fixedly connected to the connecting plate (901) of the milling head (9). A clamping plate I (2) and a clamping plate II (4) are respectively provided on both sides of the fixed plate (3). On one side of the clamping plate I (2), the clamping plate II (4) is located between the fixed plate (3) and the connecting plate (901). A clamping cylinder (1) is installed in the milling head (9). The clamping cylinder (1) is close to the clamping plate I (2). The hydraulic cylinder (1) is connected to the oil supply line (10). The oil supply line (10) is connected to the external hydraulic system.

2. The large milling head clamping and positioning device according to claim 1, characterized in that: On the side away from the clamping cylinder (1), a signal switch (5) is installed on this side of the connecting plate (901). Below the signal switch (5), an encoder (8) is installed at the end of the spindle (902) of the milling head (9). An annular block (7) is installed on the outside of the encoder (8), and a ramming block (6) is installed above the annular block (7).

3. The large milling head clamping and positioning device according to claim 1, characterized in that: Clamping plate I (2) and clamping plate II (4) are respectively attached to the fixing plate (3).

4. The large milling head clamping and positioning device according to claim 1, characterized in that: The clamping cylinder (1), clamping plate I (2), fixing plate (3) and clamping plate II (4) are all ring-shaped structures. The spindle (902) of the milling head (9) passes through the center holes of the clamping cylinder (1), clamping plate I (2), fixing plate (3) and clamping plate II (4).

5. A large milling head clamping and positioning device according to claim 1, characterized in that: Both clamping plate I (2) and clamping plate II (4) are boss-shaped. Clamping holes are provided on the plate body at the circumferential edge of clamping plate I (2) and clamping plate II (4). Each clamping hole on clamping plate I (2) corresponds to each clamping hole on clamping plate II (4). The protruding part of clamping plate II (4) is inserted into the center hole of clamping plate I (2). Clamping plate I (2) and clamping plate II (4) are clamped together on the connecting plate (901) of milling head (9).

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