A horizontal milling machine

Abstract

The application discloses a horizontal milling machine, and relates to the technical field of milling machines, which comprises a machine tool body, a workbench assembly, a mounting plate, a milling power assembly and a workpiece support assembly. The machine tool body comprises a bed body and a stand column arranged on the bed body, and the bed body is provided with a hard rail structure extending along a first direction. The workbench assembly comprises a base workbench and an upper workbench, the base workbench is movably connected to the hard rail structure, and the upper workbench is movably connected to the base workbench along a second direction. The workpiece support assembly is connected to the upper workbench and used for supporting and / or fixing a workpiece. The mounting plate is movably connected to the stand column along a third direction. The milling power assembly is fixed to the mounting plate, and the milling power assembly comprises a power head and a cutter bar in transmission connection with the power head. The cutter bar is used for mounting a cutter and driving the cutter to mill the workpiece, so that the overall rigidity and machining precision of the horizontal milling machine can be improved.

Description

Technical Field

[0001] This invention relates to the field of milling machine technology, and in particular to a horizontal milling machine. Background Technology

[0002] With the increasing demand for machining medium and large workpieces in fields such as engineering machinery, mold manufacturing, and large automotive parts, horizontal milling machines need to complete high-efficiency and high-stability heavy-duty milling operations within a large machining stroke. Although existing small horizontal milling machines have a compact structure, their bed rigidity, table load-bearing capacity, and machining stroke are limited, making it difficult to meet the heavy-duty milling requirements of medium and large workpieces. While large gantry milling machines have a large machining range and load-bearing capacity, their high cost and large footprint make them less economical in some medium and large workpiece machining scenarios.

[0003] When machining hard materials such as cast iron and steel, existing horizontal milling machines require the worktable to support heavy workpieces and withstand significant cutting reaction forces. If the guide support structure between the bed and the worktable lacks rigidity, the worktable is prone to wobbling or deformation during movement and load-bearing, leading to unstable workpiece positioning references and affecting machining accuracy and accuracy retention. Furthermore, the feed structure of some existing horizontal milling machines is relatively simple, making it difficult to simultaneously handle large machining strokes, multi-directional feeds, and high load-bearing stability, thus limiting their adaptability to machining medium to large workpieces.

[0004] Furthermore, the power heads and tool holders used in heavy-duty milling are typically heavy and bear high cutting loads. If the stability of the power head support structure is insufficient, vibration or displacement can easily occur during machining, leading to tool deflection and machining errors. For workpieces that are long or subjected to complex forces, if only conventional clamping structures are used for fixation, the workpiece may also be subject to displacement, vibration, or warping due to cutting forces during heavy-duty milling, affecting the surface quality and dimensional accuracy of the machined parts.

[0005] Therefore, how to provide a horizontal milling machine that at least partially improves the above-mentioned drawbacks is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a horizontal milling machine that can improve the overall rigidity and machining accuracy of the horizontal milling machine.

[0007] To achieve the above objectives, the present invention provides a horizontal milling machine, including a machine tool body, a worktable assembly, a mounting plate, a milling power assembly, and a workpiece support assembly; The machine tool body includes a bed and a column mounted on the bed, and the bed is provided with a rigid rail structure extending along a first direction; The worktable assembly includes a base worktable and an upper worktable. The base worktable is movably connected to a rigid rail structure, and the upper worktable is movably connected to the base worktable and is capable of moving relative to the base worktable in a second direction. The workpiece support assembly is connected to the upper worktable and is used to support and / or fix the workpiece. The mounting plate is movably connected to the column along a third direction; The milling power assembly is fixed to the mounting plate. The milling power assembly includes a power head and a tool holder that is connected to the power head for transmission. The tool holder is used to mount the cutting tool and drive the cutting tool to mill the workpiece. The first direction intersects the second direction, and the third direction is perpendicular to the first and second directions respectively.

[0008] In one possible implementation, the power head includes a housing, a first shaft, a second shaft, and a third shaft; The enclosure is fixedly connected to the mounting plate; The first shaft is rotatably mounted on the housing, and the first shaft is equipped with a first gear; The second shaft is rotatably mounted on the housing, and the second shaft is provided with a second gear that meshes with the first gear; The third shaft is rotatably mounted on the housing. The third shaft is equipped with a third gear that drives the second shaft. The third shaft is connected to the tool holder to drive the tool holder to rotate.

[0009] In one possible implementation, at least one of the first shaft, the second shaft, and the third shaft is supported at both ends by bearing assemblies on the housing. At least one end of the third shaft is provided with a first conical positioning surface, and the bearing assembly supporting the third shaft is provided with a second conical positioning surface that mates with the first conical positioning surface.

[0010] In one possible implementation, the milling power assembly further includes a drive motor, which is mounted on a mounting plate and is drive-connected to the first shaft. A belt drive mechanism or a gear drive mechanism is provided between the drive motor and the first shaft.

[0011] In one possible implementation, a tool holder support is also included, which is connected to the housing of the power head, and the end of the tool holder away from the power head is supported by the tool holder support.

[0012] In one possible implementation, the tool holder support is a hydrostatic support, and an oil supply gap is provided between the hydrostatic support and the tool holder to form a pressure oil film for supporting the tool holder when the tool holder rotates.

[0013] In one possible implementation, a cooling oil circulation system is also included, which includes an oil delivery pipeline; The oil supply line is provided in correspondence with at least one of the housing, the first shaft, the second shaft, the third shaft, the bearing assembly supporting the first shaft, the bearing assembly supporting the second shaft, and the bearing assembly supporting the third shaft, for lubricating and / or cooling the power head.

[0014] In one possible implementation, the lower part of the base worktable is provided with a hard rail sliding part that cooperates with the hard rail structure, the upper part of the base worktable is provided with a transverse guide part extending in a second direction, and the upper worktable is movably connected to the transverse guide part. The upper worktable has a clamping slot, and the workpiece support assembly is detachably connected to the clamping slot.

[0015] In one possible implementation, the workpiece support assembly includes a first support assembly, a second support assembly, and a third support assembly; The first support assembly is detachably connected to the clamping slot for clamping one end of the workpiece; The second support assembly is detachably connected to the clamping slot and is spaced apart from the first support assembly to clamp the other end of the workpiece. The third support component is disposed between the first and second support components and is used to support the middle or side of the workpiece.

[0016] In one possible implementation, the second support assembly includes a frame, a movable component, a support center shaft, and a hydrostatic oil supply structure. The frame is detachably connected to the clamping slot; The movable component is movably connected to the frame in a direction that is closer to or farther from the first support assembly; The support center shaft is located at the end of the moving part facing the first support assembly, and is used to press the workpiece against it; The hydrostatic oil supply structure is used to provide hydrostatic support for the support center shaft.

[0017] Compared to existing technologies, the technical solution provided by this invention has at least the following beneficial effects: A hardened rail structure extending along a first direction is provided on the machine bed, allowing the base worktable to move along the hardened rail structure. This improves the support rigidity and impact resistance of the worktable assembly when bearing heavy workpieces, reducing the impact of worktable wobbling or deformation on machining accuracy during heavy milling. By configuring the worktable assembly as a base worktable and an upper worktable, the workpiece can be fed horizontally along the first and second directions respectively, and vertically fed by a mounting plate that can move along a third direction, thereby creating a multi-directional relative motion relationship between the tool and the workpiece, meeting the horizontal heavy milling requirements for medium and large workpieces. The milling power assembly is fixed to the mounting plate, providing stable support for the power head and tool holder, reducing the risk of power head vibration or displacement during heavy milling. By providing a workpiece support assembly on the upper worktable, the workpiece can be supported and / or fixed during machining, reducing workpiece displacement caused by cutting forces, thereby improving the overall rigidity and machining accuracy of the horizontal milling machine. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the structure of the horizontal milling machine provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the horizontal milling machine provided in an embodiment of the present invention from another perspective; Figure 3 This is a schematic diagram of the structure of a horizontal milling machine without a milling power assembly provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the milling power assembly provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the milling power assembly provided in an embodiment of the present invention from another perspective. Figure 6 This is a schematic diagram of the power head provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the power head provided in an embodiment of the present invention from another perspective. Figure 8 This is a cross-sectional view of the milling power assembly provided in an embodiment of the present invention; Figure 9This is a schematic diagram of the structure of the second support component provided in an embodiment of the present invention; Figure 10 This is a cross-sectional view of the second support component provided in an embodiment of the present invention.

[0020] in: 100-Machine tool body; 110-Hardened rail structure; 200-Worktable assembly; 210-Base worktable; 220-Upper worktable; 221-Clamping slot; 300-Mounting plate; 400-Milling power assembly; 410-Power head; 411-Box; 412-First shaft; 413-First gear; 414-Second shaft; 415-Second gear; 416-Third shaft; 417-Third gear; 418-Tool holder; 419-Tool; 420-Drive motor; 430-Belt drive mechanism; 440-Bearing assembly; 500-Tool holder support; 600-Cooling oil circulation system; 710-First support assembly; 720-Second support assembly; 721-Frame; 722-Moving component; 723-Support center axis; 730-Third support assembly; 731-Support base; 732-Support fixing block; 800-Workpiece. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the protection scope of the present invention.

[0022] In the description of this invention, the terms "upper," "lower," "front," "rear," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only to facilitate the description of this invention and to simplify the description, and do not mean that the relevant components must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] In this embodiment, the first direction can be understood as the extension direction of the rigid rail structure 110 on the bed, as shown in the attached figure. Figure 1 The direction shown in the diagram is Y. The second direction can be understood as the direction of movement of the upper worktable 220 relative to the base worktable 210, as shown in the attached diagram. Figure 1 The direction indicated by X in the figure, the third direction can be understood as the lifting direction of the mounting plate 300 relative to the column, as shown in the attached figure. Figure 1 The direction is indicated by Z in the diagram. In one embodiment, the first direction, the second direction, and the third direction are perpendicular to each other to form a three-way feed relationship; in other embodiments, the first direction and the second direction may also be non-perpendicular intersecting, as long as the multi-directional relative feed requirements between the workpiece 800 and the tool 419 can be met.

[0024] The purpose of this invention is to provide a horizontal milling machine that can improve the overall rigidity and machining accuracy of the horizontal milling machine.

[0025] Please see Figures 1 to 10 A horizontal milling machine includes a machine body 100, a worktable assembly 200, a mounting plate 300, a milling power assembly 400, and a workpiece support assembly. The machine body 100 includes a bed and a column mounted on the bed, and a rigid rail structure 110 extending along a first direction is provided on the bed. The worktable assembly 200 includes a base worktable 210 and an upper worktable 220, the base worktable 210 being movably connected to the rigid rail structure 110, and the upper worktable 220 being movably connected to the base worktable 210. 10, and is movable relative to the base worktable 210 in a second direction; the workpiece support assembly is connected to the upper worktable 220 for supporting and / or fixing the workpiece 800; the mounting plate 300 is movably connected to the column in a third direction; the milling power assembly 400 is fixed to the mounting plate 300, the milling power assembly 400 includes a power head 410 and a tool holder 418 that is drivenly connected to the power head 410, the tool holder 418 is used to mount the tool 419 and drive the tool 419 to mill the workpiece 800.

[0026] In this embodiment, the bed can be integrally cast, and the column is fixedly mounted on the bed. Reinforcing ribs can be installed inside the bed and column; these ribs can be honeycomb or cross-rib structures, thereby improving the bending and torsional resistance of the bed and column. A rigid rail structure 110 is mounted on the bed to support the base worktable 210 and guide its movement along a first direction. Due to the large contact area of ​​the rigid rail structure 110, it improves the supporting rigidity and impact resistance of the base worktable 210 when carrying heavy workpieces 800, reducing shaking and deformation caused by cutting reaction forces during heavy milling.

[0027] The worktable assembly 200 adopts a double-layer moving structure. The base worktable 210 moves along the rigid rail structure 110, and the upper worktable 220 moves relative to the base worktable 210 in a second direction, enabling the workpiece 800 to be fed in two directions in the horizontal plane. The upper worktable 220 is used to support the workpiece support assembly and the workpiece 800 to be processed. Its table surface can be provided with a clamping slot to adjust the position of the workpiece support assembly according to the size of the workpiece 800. The mounting plate 300 is movably mounted on the column in a third direction and is used to support the milling power assembly 400. Since the heavy-duty milling power assembly 400 is relatively heavy, by setting the mounting plate 300 as the supporting base of the power head 410, the mounting rigidity of the power head 410 can be improved, so that the power head 410 and the tool holder 418 remain stable during lifting, feeding and cutting processes. The milling power assembly 400 is used to output milling power. The power head 410 drives the tool holder 418 to rotate. The tool holder 418 is equipped with a cutting tool 419, which performs milling on the workpiece 800. The workpiece support assembly is set on the upper worktable 220, which can clamp, tighten, or provide auxiliary support for the workpiece 800, thereby reducing the workpiece 800 from shifting due to horizontal cutting force or impact load during heavy-duty cutting.

[0028] A rigid rail structure 110 extending along the first direction is provided on the machine bed, so that the base worktable 210 can move along the rigid rail structure 110, thereby improving the support rigidity and impact resistance of the worktable assembly 200 when carrying heavy workpieces 800, and reducing the impact of worktable shaking or deformation on machining accuracy during heavy milling. By setting the worktable assembly 200 as a base worktable 210 and an upper worktable 220, the workpiece 800 can be fed horizontally along the first direction and the second direction respectively, and the milling power assembly 400 can be driven by the mounting plate 300 that can move along the third direction to achieve vertical feed, so that the tool 419 and the workpiece 800 form a multi-directional relative motion relationship, which meets the horizontal heavy milling requirements of medium and large workpieces 800. The milling power assembly 400 is fixed to the mounting plate 300, which provides stable support for the power head 410 and the tool holder 418, reducing the risk of vibration or displacement of the power head 410 during heavy milling. By setting a workpiece support assembly on the upper worktable 220, the workpiece 800 can be supported and / or fixed during the machining process, reducing the displacement of the workpiece 800 caused by the cutting force, thereby improving the overall rigidity and machining accuracy of the horizontal milling machine, and thus improving the machining efficiency.

[0029] The power head 410 includes a housing 411, a first shaft 412, a second shaft 414, and a third shaft 416. The housing 411 is fixedly connected to the mounting plate 300. The first shaft 412 is rotatably mounted on the housing 411 and has a first gear 413. The second shaft 414 is rotatably mounted on the housing 411 and has a second gear 415 that meshes with the first gear 413. The third shaft 416 is rotatably mounted on the housing 411 and has a third gear 417 that drives the second shaft 414. The third shaft 416 is connected to the tool holder 418 to drive the tool holder 418 to rotate.

[0030] The housing 411 of the power head 410 can be an integrally cast structure to reduce splicing gaps and assembly deformation. The housing 411 internally features a multi-stage shaft and gear transmission structure. Driving force is input from the first shaft 412, transmitted via the first gear 413 and the second gear 415 to the second shaft 414, and then from the second shaft 414 to the third shaft 416. The third shaft 416 further drives the tool holder 418 to rotate. In one embodiment, the first shaft 412, the second shaft 414, and the third shaft 416 form a three-stage transmission structure for progressively reducing speed and amplifying torque, making the power head 410 suitable for heavy-duty milling of materials such as steel and cast iron. In another embodiment, the power head 410 can also employ a two-stage transmission structure, as long as it meets the requirements for power input and torque amplification. The transmission between the second shaft 414 and the third shaft 416 can be achieved through gear meshing or helical gear engagement. When using gear transmission, the structure is compact and the transmission is reliable; when using helical gears, it is beneficial to reduce transmission impact and improve transmission smoothness.

[0031] Furthermore, at least one of the first shaft 412, the second shaft 414 and the third shaft 416 is supported at both ends by bearing assembly 440 on housing 411; at least one end of the third shaft 416 is provided with a first conical positioning surface, and the bearing assembly 440 supporting the third shaft 416 is provided with a second conical positioning surface that mates with the first conical positioning surface.

[0032] In this embodiment, both ends of each shaft are supported on the housing 411 by bearing assemblies 440, enabling the shaft to maintain a stable radial and axial position during rotation. Bearing assemblies 440 may include angular contact bearings or cylindrical roller bearings. For the third shaft 416, which bears a large cutting load, bearing assemblies 440 with higher load-bearing capacity can be provided at both ends to improve the support rigidity of the output end of the tool holder 418. As the output shaft connected to the tool holder 418, the third shaft 416 experiences significant force, directly affecting the rotational accuracy of the tool 419. Therefore, a first tapered positioning surface is provided at at least one end of the third shaft 416, and a second tapered positioning surface is provided on the corresponding bearing assembly 440. The cooperation of the two tapered positioning surfaces improves the coaxiality and positioning stability of the assembled third shaft 416.

[0033] In one embodiment, tapered positioning structures are provided at both ends of the third shaft 416 to improve the positioning accuracy at both ends of the third shaft 416. In another embodiment, the tapered positioning structure is provided only at the end of the third shaft 416 closest to the tool holder 418 to focus on improving the rotational support accuracy on the tool holder 418 side. This reduces the radial runout and axial movement of the third shaft 416 during heavy milling, improves the cutting stability of the tool 419, and helps to improve the surface quality and dimensional accuracy of the machined material.

[0034] In one possible implementation, the milling power assembly 400 further includes a drive motor 420, which is mounted on the mounting plate 300 and is drive-connected to the first shaft 412. A belt drive mechanism 430 or a gear drive mechanism is provided between the drive motor 420 and the first shaft 412. The drive motor 420 is fixedly mounted on the mounting plate 300 and drive-connected to the power input end of the power head 410. The drive motor 420 can transmit power to the first shaft 412 via the belt drive mechanism 430 or via a gear drive mechanism. When using the belt drive mechanism 430, the output end of the drive motor 420 can be equipped with a driving pulley, and the input end of the first shaft 412 can be equipped with a driven pulley. The driving pulley and the driven pulley are connected by a transmission belt. The belt drive mechanism 430 has a certain buffering capacity, which can reduce the impact of instantaneous impacts on the internal transmission structure of the power head 410. When using a gear transmission mechanism, the output gear of the drive motor 420 meshes directly or indirectly with the input gear of the first shaft 412. The gear transmission mechanism has high transmission efficiency and is suitable for scenarios with large torque output. The drive motor 420 and the power head 410 are both mounted on the mounting plate 300, so that the two maintain a stable relative position when the mounting plate 300 is raised and lowered, avoiding changes in the transmission center distance from affecting the transmission accuracy.

[0035] In one possible implementation, the horizontal milling machine further includes a tool holder support 500, which is connected to the housing 411 of the power head 410. The end of the tool holder 418 furthest from the power head 410 is supported by the tool holder support 500. Specifically, one end of the tool holder 418 is connected to the power head 410, and the other end is supported by the tool holder support 500. The tool holder support 500 can be connected to the mounting plate 300 or to the housing 411 of the power head 410, forming a two-end support structure for the tool holder 418. Compared to a single-end overhang structure, the two-end support structure significantly improves the bending rigidity of the tool holder 418 and reduces the risk of deflection and vibration during heavy cutting. The tool holder support 500 is a hydrostatic support, and an oil supply gap is provided between the hydrostatic support and the tool holder 418 to form a pressure oil film to support the tool holder 418 when it rotates. The oil supply system delivers pressurized oil to the oil supply gap, creating a pressure oil film between the tool holder 418 and the hydrostatic support. As the tool holder 418 rotates, the pressure oil film provides non-contact support around its outer periphery, reducing friction and wear. The hydrostatic support provides high rigidity and precision support for the tool holder 418, making it particularly suitable for heavy-duty cutting. Because the pressure oil film has a damping effect, it also suppresses vibration of the tool holder 418, reducing chatter risk during heavy cutting and improving tool life and machining accuracy.

[0036] In one possible implementation, the horizontal milling machine further includes a cooling oil circulation system 600, which includes an oil supply pipeline. The oil supply pipeline is correspondingly configured with at least one of the housing 411, the first spindle 412, the second spindle 414, the third spindle 416, the bearing assembly 440 supporting the first spindle 412, the bearing assembly 440 supporting the second spindle 414, and the bearing assembly 440 supporting the third spindle 416, for lubricating and / or cooling the power head 410. The cooling oil circulation system 600 is used to deliver cooling oil to the internal or external heat-generating parts of the power head 410. The cooling oil circulation system 600 may include an oil tank, an oil pump, an oil supply pipeline, and a return oil pipeline. The oil pump delivers the cooling oil from the oil tank to the housing 411, the spindle, or the bearing assembly 440 of the power head 410 via the oil supply pipeline. After lubrication and heat exchange, the cooling oil returns to the oil tank via the return oil pipeline. In this embodiment, the oil supply line extends into the housing 411 to lubricate and cool the bearing assembly 440 and the gear meshing parts, which can reduce the heat accumulation of the power head 410 during long-term operation, thereby improving the accuracy and stability during heavy milling.

[0037] In one possible implementation, the lower part of the base worktable 210 is provided with a hard rail sliding part that cooperates with the hard rail structure 110, and the upper part of the base worktable 210 is provided with a transverse guide part extending along a second direction. The upper worktable 220 is movably connected to the transverse guide part, and the table surface of the upper worktable 220 is provided with a clamping groove 221. The workpiece support assembly is detachably connected to the clamping groove 221. The hard rail sliding part slides in cooperation with the hard rail structure 110 on the bed, enabling the base worktable 210 to move stably along the first direction. A lubricating oil film can be provided between the hard rail sliding part and the hard rail structure 110 to reduce movement resistance and wear. The upper part of the base worktable 210 is provided with a transverse guide part, and the upper worktable 220 moves along the second direction through the transverse guide part. The transverse guide part can adopt a hard rail guide structure or a linear guide structure. When using a hard rail guide structure, it is beneficial to improve the load-bearing capacity; when using a linear guide structure, it is beneficial to improve the movement response. The upper worktable 220 has a clamping slot 221 on its surface, and the workpiece support assembly is detachably connected to the clamping slot 221. The clamping slot 221 can be a T-slot or a straight slot. Through the detachable connection, the position of the workpiece support assembly can be adjusted according to the length of the workpiece 800, thereby improving the adaptability to different workpieces 800.

[0038] In one possible implementation, the workpiece support assembly includes a first support assembly 710, a second support assembly 720, and a third support assembly 730; the first support assembly 710 is detachably connected to the clamping groove 221 for clamping one end of the workpiece 800; the second support assembly 720 is detachably connected to the clamping groove 221 and spaced apart from the first support assembly 710 for pressing against the other end of the workpiece 800; the third support assembly 730 is disposed between the first support assembly 710 and the second support assembly 720 for supporting the middle or side of the workpiece 800.

[0039] In this embodiment, the first support assembly 710 and the second support assembly 720 are respectively disposed at both ends of the workpiece 800, for clamping and pressing the workpiece 800 in the axial or length direction. The third support assembly 730 is disposed between the first support assembly 710 and the second support assembly 720, for providing auxiliary support for the middle or side of the workpiece 800. The first support assembly 710 may include a turntable base, a rotary drive component, an adapter component, and a clamping component. The turntable base is detachably connected to the clamping slot 221. The rotary drive component is connected to the turntable base through the adapter component. The rotary drive component is used to drive the clamping component and the workpiece 800 to rotate. The clamping component is used to clamp one end of the workpiece 800. The clamping component may be, but is not limited to, a hydraulic jaw or a mechanical chuck. In this embodiment, the rotary drive cylinder of the first support assembly 710 can be angle-locked and does not rotate, so that the rotary drive component does not rotate. The rotary drive cylinder only acts on the clamping component, so that the clamping component clamps the workpiece 800.

[0040] The second support assembly 720 is a tailstock structure used to clamp the other end of the workpiece 800. The second support assembly 720 can cooperate with the first support assembly 710 to balance the forces on both ends of the workpiece 800 during processing, reducing workpiece 800 wobble. The second support assembly 720 includes a frame 721, a movable component 722, a support center shaft 723, and a hydrostatic oil supply structure. The frame 721 is detachably connected to the clamping slot 221 and its installation position can be adjusted according to the length of the workpiece 800. The movable component 722 is movably connected to the frame 721 in a direction approaching or away from the first support assembly 710. The support center shaft 723 is located at the end of the movable component 722 facing the first support assembly 710 and is used to clamp the workpiece 800. The hydrostatic oil supply structure provides hydrostatic support to the support center shaft 723. The movable component 722 can be hydraulically driven or screw-driven. When hydraulically driven, the clamping force is stable and easy to automatically control; when screw-driven, the structure is simple and easy to adjust. The hydrostatic oil supply structure supplies oil to the support area of ​​the support center shaft 723, providing radial hydrostatic support to the support center shaft 723. This hydrostatic support improves the rotational accuracy and load-bearing stability of the support center shaft 723 and reduces wear under stress. Furthermore, the second support assembly 720 may also be equipped with a locking structure to lock the moving member 722 relative to the frame 721 after the moving member 722 has pressed against the workpiece 800.

[0041] The third support assembly 730 may include a support base 731 and a support fixing block 732. The support base 731 is detachably connected to the upper worktable 220, and the support fixing block 732 is connected to the support base 731 and is used to support the workpiece 800. The support fixing block 732 may be, but is not limited to, a V-shaped support block or a flat support block. Through the cooperation of the first support assembly 710, the second support assembly 720, and the third support assembly 730, the clamping stability of long shaft, cylindrical, or irregular medium-to-large workpieces 800 can be improved, and the displacement and vibration of the workpiece 800 caused by cutting forces during heavy milling can be reduced.

[0042] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0043] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0044] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A horizontal milling machine, characterized in that, It includes a machine tool body (100), a worktable assembly (200), a mounting plate (300), a milling power assembly (400), and a workpiece support assembly; The machine tool body (100) includes a bed and a column disposed on the bed, and the bed is provided with a hard rail structure (110) extending in a first direction. The workbench assembly (200) includes a base workbench (210) and an upper workbench (220). The base workbench (210) is movably connected to the rigid rail structure (110), and the upper workbench (220) is movably connected to the base workbench (210) and is capable of moving relative to the base workbench (210) in a second direction. The workpiece support assembly is connected to the upper worktable (220) and is used to support and / or fix the workpiece (800). The mounting plate (300) is movably connected to the column in a third direction; The milling power assembly (400) is fixed to the mounting plate (300). The milling power assembly (400) includes a power head (410) and a tool holder (418) that is pulverizedly connected to the power head (410). The tool holder (418) is used to mount a cutting tool (419) and drive the cutting tool (419) to mill the workpiece (800). Wherein, the first direction intersects with the second direction, and the third direction is perpendicular to both the first direction and the second direction.

2. The horizontal milling machine according to claim 1, characterized in that, The power head (410) includes a housing (411), a first shaft (412), a second shaft (414), and a third shaft (416). The housing (411) is fixedly connected to the mounting plate (300); The first shaft (412) is rotatably mounted on the housing (411), and the first shaft (412) is provided with a first gear (413). The second shaft (414) is rotatably disposed on the housing (411), and the second shaft (414) is provided with a second gear (415) that meshes with the first gear (413). The third shaft (416) is rotatably mounted on the housing (411). The third shaft (416) is provided with a third gear (417) that is in transmission cooperation with the second shaft (414). The third shaft (416) is connected to the tool holder (418) to drive the tool holder (418) to rotate.

3. The horizontal milling machine according to claim 2, characterized in that, At least one of the first shaft (412), the second shaft (414) and the third shaft (416) is supported at both ends by bearing assemblies (440) on the housing (411). At least one end of the third shaft (416) is provided with a first conical positioning surface, and the bearing assembly (440) supporting the third shaft (416) is provided with a second conical positioning surface that cooperates with the first conical positioning surface.

4. The horizontal milling machine according to claim 2, characterized in that, The milling power assembly (400) further includes a drive motor (420), which is disposed on the mounting plate (300) and is connected to the first shaft (412) in a transmission manner; A belt drive mechanism (430) or a gear drive mechanism is provided between the drive motor (420) and the first shaft (412).

5. The horizontal milling machine according to any one of claims 2 to 4, characterized in that, It also includes a tool holder support (500), which is connected to the housing (411) of the power head (410), and the end of the tool holder (418) away from the power head (410) is supported by the tool holder support (500).

6. The horizontal milling machine according to claim 5, characterized in that, The tool holder support (500) is a hydrostatic support, and an oil supply gap is provided between the hydrostatic support and the tool holder (418) to form a pressure oil film for supporting the tool holder (418) when the tool holder (418) rotates.

7. The horizontal milling machine according to any one of claims 2 to 4, characterized in that, It also includes a cooling oil circulation system (600), which includes an oil delivery pipeline; The oil supply line is configured to correspond to at least one of the housing (411), the first shaft (412), the second shaft (414), the third shaft (416), the bearing assembly (440) supporting the first shaft (412), the bearing assembly (440) supporting the second shaft (414), and the bearing assembly (440) supporting the third shaft (416), for lubricating and / or cooling the power head (410).

8. The horizontal milling machine according to any one of claims 1 to 4, characterized in that, The lower part of the base worktable (210) is provided with a hard rail sliding part that cooperates with the hard rail structure (110), and the upper part of the base worktable (210) is provided with a transverse guide part extending along the second direction. The upper worktable (220) is movably connected to the transverse guide part. The upper worktable (220) has a clamping slot (221) on its surface, and the workpiece support assembly is detachably connected to the clamping slot (221).

9. The horizontal milling machine according to claim 8, characterized in that, The workpiece support assembly includes a first support assembly (710), a second support assembly (720), and a third support assembly (730). The first support assembly (710) is detachably connected to the clamping groove (221) for clamping one end of the workpiece (800); The second support assembly (720) is detachably connected to the clamping groove (221) and spaced apart from the first support assembly (710) for pressing against the other end of the workpiece (800); The third support component (730) is disposed between the first support component (710) and the second support component (720) for supporting the middle or side of the workpiece (800).

10. The horizontal milling machine according to claim 9, characterized in that, The second support assembly (720) includes a frame (721), a movable component (722), a support center shaft (723), and a hydrostatic oil supply structure; The frame (721) is detachably connected to the clamping slot (221); The movable component (722) is movably connected to the frame (721) in a direction that is close to or away from the first support component (710). The support tip shaft (723) is disposed at one end of the movable member (722) facing the first support assembly (710) and is used to press against the workpiece (800). The hydrostatic oil supply structure is used to provide hydrostatic support for the support tip shaft (723).

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