A multi-station tool rotary curve cutting feeding device and a curve cutting feeding method thereof

Abstract

The application discloses a multi-station cutter rotary curve cutting feeding device and a curve cutting feeding method thereof, relates to cutting equipment, and comprises a base platform, upper and lower end platforms, an X-shaped lifting feeding mechanism, a connecting rod type feeding driving mechanism and a belt wheel transmission system. The base platform is a supporting body, the upper end platform is provided with a cutter and connected with the belt wheel transmission system and driven to rotate, the X-shaped mechanism is connected with the upper end platform at the upper end and connected with a movable platform at the lower end, the movable platform is connected with the connecting rod type mechanism and driven by a feeding driving motor, and the components are connected through hinged shafts and connecting seats. During work, the belt wheel transmission system drives the cutter to rotate, the feeding motor drives the X-shaped mechanism lower end platform to lift through the connecting rod mechanism, drives the cutter to feed in the radial direction, and cooperatively completes cutting. The device is combined with motor and mechanical transmission, does not need complex energy, is stable and efficient, is suitable for batch production due to multi-station parallelism, can be detachably matched with various workpieces, can be adjusted, can meet requirements in combination with different motors, and is modularized in structure and easy to maintain.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, and in particular to a multi-station rotary tool feed device for curve cutting of rotating workpieces. Background Technology

[0002] In modern mechanical manufacturing systems, curved workpieces serve as key fundamental components, widely permeating core areas such as automotive steering knuckles, gearbox gear profiles, precision instrument sliding guides, hydraulic pipeline elbows in engineering machinery, and joint connectors in medical devices. The precision of the curved profile of these workpieces directly affects the smoothness of vehicle driving, the sensitivity of instrument operation, and the efficiency of mechanical transmission; their machining quality is also an important benchmark for measuring the level of equipment manufacturing. Driven by both consumption and industrial upgrading, the market demand for curved workpieces exhibits "three highs and two many" characteristics—high precision, high surface quality, high consistency, as well as multiple product switching and small-batch customization. This poses unprecedented challenges to the comprehensive performance of cutting equipment. Existing curve cutting devices suffer from several deep-seated technical limitations in practical applications: First, the single-station design results in equipment utilization of less than 60%, especially in multi-variety production, where changeover and debugging time accounts for as much as 40%, far exceeding the standard threshold for flexible manufacturing; Second, due to insufficient transmission clearance and rigidity, traditional lead screw feed mechanisms can experience vibration amplitudes of up to 0.02 mm at cutting speeds exceeding 1000 r / min, directly causing shape errors in curved workpieces to exceed standards and failing to meet the assembly precision requirements of key automotive components; Third, the integrated design of the tool drive system and feed system lacks standardized interfaces, resulting in an average replacement time of over 6 hours and maintenance costs that are 30% higher than the industry average. More significantly, existing equipment exhibits poor adaptability to curved workpieces of different materials: when machining high-strength steel, improper cutting force matching leads to a 60% decrease in tool durability; while when machining aluminum alloys, fluctuations in feed rate easily cause tool sticking, resulting in a two-grade reduction in surface quality. Furthermore, most equipment does not consider compatibility with the production environment; in dusty or coolant-rich conditions, the failure rate nearly doubles, severely impacting production continuity. Based on these industry pain points, developing an innovative cutting feed device with multi-station parallel machining, high-precision and stable feed, rapid maintenance and adaptation, and multi-material compatibility has become a core breakthrough for improving quality and efficiency in the machinery manufacturing sector, and holds irreplaceable practical significance for achieving technological upgrades in industries such as automotive and precision manufacturing. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-station rotary curve cutting feed device and its curve cutting feed method, in order to solve the problems mentioned in the background art, such as insufficient equipment utilization due to the single-station design of existing curve cutting devices, high proportion of changeover and debugging time, vibration affecting machining accuracy due to insufficient rigidity of traditional lead screw feed mechanisms, high maintenance costs and long maintenance time due to the lack of standardized interfaces in the integrated design of tool drive and feed system, poor adaptability to workpieces of different materials and insufficient compatibility with production environment.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a multi-station rotary curve cutting feed device and its curve cutting feed method, comprising a base platform, an upper table, an X-shaped lifting feed mechanism, a linkage-type feed drive mechanism, and a pulley transmission system. The upper table is equipped with a cutting tool and connected to the pulley transmission system. The cutting tool is also fixedly connected to the X-shaped lifting feed mechanism. The upper end of the X-shaped lifting feed mechanism is fixedly connected to the upper table, and the lower end is connected to a movable table. The linkage-type feed drive mechanism is connected to a feed motor, and its output end is connected to the movable table. The pulley transmission system and the linkage-type feed drive mechanism are respectively assembled at corresponding positions on the base platform, and the components are linked by hinges or fixed structures. The pulley transmission system drives the upper table and the cutting tool to rotate. The linkage-type feed drive mechanism, driven by the feed motor, lifts the movable table, and the X-shaped lifting feed mechanism drives the cutting tool to achieve radial feed. The X-type lifting feed mechanism includes a set of cross-arranged transmission links. The intersections of these links are connected by hinge shafts. The top end of the link is hinged to the tool, and the bottom end is hinged to the movable table. Through the bending and straightening motion of the cross-arranged transmission links, the radial feed adjustment of the tool and the stable lifting and lowering of the movable table can be achieved simultaneously, improving feed accuracy and motion smoothness. The pulley drive system includes a driving pulley, a driven pulley, and a drive belt. The driving pulley is connected to the output shaft of an external drive motor, and the driven pulley is fixedly connected to the rotation shaft of the upper table. The drive belt is sleeved between the driving pulley and the driven pulley, enabling synchronous rotation of the upper table and the tool. The linkage-type feed drive mechanism includes a crank, connecting rod, slider, lifting module, and connecting platform. One end of the crank is fixedly connected to the output shaft of the feed motor, and the other end is hinged to the connecting rod. The end of the connecting rod away from the crank is hinged to the slider. The slider and lifting module form a movable connection for lifting the connecting platform. The connecting platform is slidably connected to the bottom of the movable table, converting the rotational motion of the feed motor into the linear lifting motion of the movable table. The linkage-type feed drive mechanism and the movable table are slidably connected through the connecting platform, which is equipped with sliding ball bearings to reduce noise and friction when lifting the movable table. The connection points between the tool and the upper table, as well as the X-type lifting feed mechanism, are all equipped with detachable structures. These detachable structures are bolted connections or quick-release clips. The cutting ends of the tools are available in various specifications (such as pointed edges, arc edges, and stepped edges), allowing for tool replacement according to the workpiece material and curve contour. At least two sets of cutting units, each consisting of an upper table, an X-shaped lifting feed mechanism, a movable table, and a linkage-type feed drive mechanism, are spaced apart circumferentially or radially on the base platform. Each cutting unit shares a pulley drive system or has an independently configured transmission assembly, enabling parallel machining of multiple workpieces. The cutting material generated during machining is discharged from the scrap port located below the cutting tool.

[0005] Curve cutting feed method: The feed motor drives the linkage feed drive mechanism to move up and down, thereby driving the linear lifting and lowering motion of the movable table. The movable table drives the lower end block of the X-type lifting feed mechanism to lift and lower. The lifting and lowering of the lower end block causes the angle of the transmission linkage to change, which in turn causes the distance of the symmetrical tools fixed on the X-type lifting feed mechanism to change, thereby completing the tool feed.

[0006] Preferably, a set of transmission links of the X-type lifting feed mechanism adopts a symmetrical cross structure. The hinge shaft at the cross is designed with precision fit to eliminate gaps. It can improve the straightness of the radial feed of the tool through synchronous bending and stretching motion and reduce machining errors caused by structural shaking.

[0007] Preferably, the driving pulley and driven pulley of the belt drive system adopt the same module tooth profile design, and the transmission belt is equipped with a tension adjustment structure to maintain a constant preload. This can reduce slippage and phase deviation during transmission, ensure the high synchronization of the upper table and the tool rotation, reduce wear of transmission components caused by uneven force, and extend the service life of the overall transmission system.

[0008] Preferably, the crank and connecting rod hinge point of the linkage-type feed drive mechanism adopts a universal joint structure, and the slider and lifting module are guided and cooperated by the guide rail, which can improve the conversion efficiency of rotary motion to linear motion and reduce energy loss in the transmission process. Preferably, the detachable structure of the cutting tool and the connecting part integrates a quick positioning groove and a self-locking device, which can complete the tool change without additional tools, and the structural limit ensures the consistency of each clamping, adapting to the rapid switching of multiple workpiece specifications. Preferably, the cutting units on the base platform are connected to the basic frame through standardized interfaces, and the transmission paths of each group of units are independent of each other. The number of units can be flexibly increased or decreased according to processing requirements, thereby improving the adaptability of the equipment to different batch production.

[0009] Compared with existing technologies, this invention achieves flexible adaptation to the processing needs of workpieces with different specifications and batch sizes by using cutting units that can be flexibly increased or decreased in number. Production switching can be completed without large-scale equipment modification, which significantly improves the versatility and production efficiency of the device and effectively reduces production costs. Furthermore, the symmetrical cross structure of the X-type lifting feed mechanism and the synchronous design of the pulley drive enhance the rigidity and stability of the transmission system, reduce vibration and deviation during operation, and ensure the accuracy and consistency of curved workpiece processing. At the same time, the modular structural layout and the quick tool change design optimize the convenience of equipment maintenance and changeover, shorten downtime for maintenance, and improve the overall utilization rate of the equipment. Furthermore, the high-efficiency transmission of the linkage-type feed drive mechanism and the friction-reducing design of the sliding ball reduce power loss and component wear, which helps to ensure the long-term stable operation of the device, reduce production interruptions caused by failures, thereby reducing maintenance costs in production and further improving the economic efficiency of production. Attached Figure Description

[0010] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a bottom view schematic diagram of the main structure of the present invention; Figure 3 This is a schematic diagram of the X-type lifting and feeding mechanism of the present invention; Figure 4 This is a schematic diagram of the linkage-type feed drive mechanism of the present invention; Figure 5 This is a schematic diagram of the pulley drive system of the present invention; Figure 6 This is a schematic diagram of the cutting tool, upper and lower tables, and X-shaped lifting and feeding mechanism of the present invention.

[0012] The following are the annotations in the diagram: 1. Base platform; 2. Upper table; 3. X-type lifting feed mechanism; 31. Transmission link; 32. Hinge shaft; 33. Upper block; 34. Lower block; 4. Linkage feed drive mechanism; 41. Crank; 42. Connecting rod; 43. Slider; 44. Lifting module; 45. Connecting platform; 451. Sliding ball; 5. Pulley drive system; 51. Driving pulley; 52. Driven pulley; 53. Transmission belt; 54. Drive motor; 6. Cutting tool; 7. Movable table; 8. Feed motor; 9. Rotary shaft; 10. Scrap port. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of 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 some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Please see Figure 1-6The present invention provides the following technical solution: To achieve efficient and precise machining of curved workpieces, the multi-station rotary tool curve cutting feed device and its curve cutting feed method of this invention have shown significant advantages in actual production. The collaborative operation process and technological highlights of its various components are deeply integrated, and specific applications are as follows: After the equipment starts up, the base platform 1 provides a stable support for the overall structure. The pulley drive system 5 and the linkage-type feed drive mechanism 4 mounted on it form a dual-power collaborative system. This high-rigidity layout design is the foundation for ensuring machining accuracy. Combined with the stable support of the movable table 7, it can effectively offset the vibration and stress during high-speed cutting. Multi-station synchronous operation can be achieved simply by linking the drive motor 54 and the feed motor 8 through the central control system. The overall control logic is clear and the operation is simple, providing stable power output for automated mass production. After the operator fixes the workpiece to be processed onto the fixture, the pulley drive system 5 starts first: the drive motor 54 drives the driving pulley 51 to rotate, which in turn drives the driven pulley 52 through the transmission belt 53, causing the rotating shaft 9 to drive the upper table 2 and the tool 6 to rotate synchronously. The precise meshing design of the teeth of the driving pulley 51 and the driven pulley 52, combined with the tension adjustment structure, ensures the stability of the rotation speed of the tool 6. Even at a high speed of 1000 r / min, the rotation speed fluctuation remains minimal, providing uniform cutting force for machining curved contours. The scrap port 10 is located below the tool 6, penetrating the main body of the device vertically, and is used to collect scrap generated during cutting. Once the tool 6 reaches the preset speed, the linkage-type feed drive mechanism 4 begins to operate. Located in the center of the base platform 1, this mechanism consists of a crank 41, a connecting rod 42, a slider 43, a lifting module 44, and a connecting platform 45. Sliding balls 451 are embedded in the surface of the connecting platform 45. The feed motor 8 drives the crank 41 to rotate, which in turn pushes the slider 43 to slide within the lifting module 44 via the connecting rod 42, causing the connecting platform 45 to smoothly lift and lower the movable table 7. The friction-reducing effect of the sliding balls 451 significantly reduces motion resistance, ensuring rapid and smooth feed response. This design significantly improves the smoothness of the axial feed of the tool 6. During the lifting of the movable platform 7, the X-shaped lifting and feeding mechanism 3 moves in sync. This mechanism consists of a set of cross-distributed transmission links 31, which are connected by hinge shafts 32 at the intersections. In this embodiment, there are two cross-distributed transmission links 31, which can be increased.

[0015] The upper end block 33 of the X-shaped lifting feed mechanism 3 is hinged to the tool 6, and the lower end block 34 is hinged to the movable table 7. As the movable table 7 rises, the transmission link 31 extends and retracts around the hinge axis 32, pushing the tool 6 through the upper end block 33 to achieve precise radial feed. The symmetrical cross design of a set of transmission links 31 can evenly transmit the feed force to the tool 6, effectively avoiding trajectory deviation caused by unilateral force and ensuring that the curve machining contour error is controlled within 0.03mm. For workpieces of different materials and specifications, the quick-adaptation function of tool 6 plays a crucial role. The connection between tool 6 and the upper table 2 and the X-shaped lifting feed mechanism 3 adopts a quick-release snap-fit ​​design, allowing operators to change to different specifications of tool 6, such as pointed or rounded edges, according to processing requirements without the need for complex tools. Combined with the positioning reference structure, it ensures a repeatability of 0.01mm for each clamping. This modular design not only adapts to the processing of various workpieces but also reduces changeover and debugging time, significantly improving the flexibility of the equipment.

[0016] The unique curve cutting feed method drives the feed motor 8 to move the linkage feed drive mechanism 4 up and down, thereby driving the linear lifting motion of the movable table 7. The movable table 7 drives the lower end block 34 of the X-type lifting feed mechanism 3 to lift up and down. The lifting of the lower end block 34 causes the angle of the transmission link 31 to change, which in turn causes the distance of the symmetrical tool 6 fixed on the X-type lifting feed mechanism 3 to change, thus making the processing efficiency higher.

[0017] Six cutting units arranged circumferentially on the base platform 1 operate synchronously, each unit adapting to different machining requirements through an independent feed parameter control system. For example, in the mass production of automotive steering knuckles, three units process high-strength steel workpieces, while the other three simultaneously handle aluminum alloy workpieces. By setting differentiated tool speeds and feed rates, parallel machining of workpieces of multiple materials and specifications is achieved. Throughout the process, all components work collaboratively and continuously, significantly shortening the single-piece machining cycle. At the same time, the structural stability of the equipment reduces downtime due to malfunctions, significantly improving mass production efficiency. Thanks to the precise synchronization of the pulley drive system 5 and the stable feed of the X-shaped lifting feed mechanism 3, the equipment significantly improves the accuracy and consistency of curve machining, ensuring that the workpiece contour accuracy and surface quality meet high standards. This design, which integrates high efficiency, precision, and adaptability, makes the equipment suitable for various industrial production scenarios such as automobiles and precision instruments, effectively reducing production costs, improving overall utilization, and providing reliable component support for subsequent assembly processes, demonstrating good practicality and application prospects.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-station rotary curve cutting feed device, comprising a base platform (1), an upper table (2), an X-shaped lifting feed mechanism (3), a linkage feed drive mechanism (4), a pulley transmission system (5), and a scrap port (10); characterized in that: The upper platform (2) is equipped with a cutting tool (6) and connected to the pulley drive system (5). The cutting tool (6) is also fixedly connected to the X-shaped lifting feed mechanism (3). The upper end of the X-shaped lifting feed mechanism (3) is fixedly connected to the upper platform (2), and the lower end is connected to a movable platform (7). The linkage feed drive mechanism (4) is connected to the feed motor (8), and its output end is connected to the movable platform (7). The pulley drive system (5) and the linkage feed drive mechanism (4) are respectively assembled at corresponding positions on the base platform (1). The components are linked by a hinged or fixed structure; the pulley transmission system (5) drives the upper table (2) and the cutter (6) to rotate; the linkage feed drive mechanism (4) drives the movable table (7) to rise under the drive of the feed motor (8); the X-type lifting feed mechanism (3) drives the cutter (6) to achieve radial feed; the X-type lifting feed mechanism (3) includes a set of cross-arranged transmission links; the intersection of the set of transmission links (31) is connected by a hinge shaft (32); and its top end is provided with an upper block (3). 3) Hinged to the cutting tool (6), the bottom end is provided with a lower end block (34) which is hinged to the movable table (7). The linkage-type feed drive mechanism (4) includes a crank (41), a connecting rod (42), a slider (43), a lifting module (44), and a connecting platform (45). One end of the crank (41) is fixedly connected to the output shaft of the feed motor (8), and the other end is hinged to the connecting rod (42). The end of the connecting rod (42) away from the crank (41) is hinged to the slider (43). The slider (43) The lifting module (44) is movably connected to the connecting platform (45) for lifting. The connecting platform (45) is slidably connected to the bottom end of the movable table (7) to convert the rotational motion of the feed motor (8) into the linear lifting motion of the movable table (7). At least two sets of cutting units composed of the upper table (2), the X-shaped lifting feed mechanism (3), the movable table (7) and the linkage feed drive mechanism (4) are arranged at intervals along the circumference or radial direction on the base platform (1).

2. The multi-station rotary curve cutting feed device according to claim 1, characterized in that: The pulley drive system (5) includes a driving pulley (51), a driven pulley (52) and a transmission belt (53). The driving pulley (51) is connected to the output shaft of the drive motor (54). The driven pulley (52) is fixedly connected to the rotation shaft (9) of the upper table (2). The transmission belt (53) is sleeved between the driving pulley (51) and the driven pulley (52) and is a synchronous belt. The surface is provided with a wear-resistant coating to realize the synchronous rotation of the upper table (2) and the tool (6).

3. The multi-station rotary curve cutting feed device according to claim 1, characterized in that: The linkage-type feed drive mechanism (4) is slidably connected to the movable table (7) through the connecting platform (45), and the connecting platform (45) is provided with sliding balls (451) to reduce noise and friction when lifting the movable table (7).

4. The multi-station rotary curve cutting feed device according to claim 1, characterized in that: The connection between the cutting tool (6) and the upper table (2) and the X-type lifting feed mechanism (3) is provided with a detachable structure. The detachable structure is a bolt connection or a quick-release buckle. The cutting end of the cutting tool (6) is provided with a sharp edge, a circular arc edge, and a stepped edge. The cutting tool can be replaced with a suitable tool according to the workpiece material and curve contour.

5. A multi-station rotary curve cutting feed device according to claim 1, characterized in that: Each group of cutting units shares a pulley transmission system (5) or independently configures transmission components to realize parallel processing of multiple workpieces. The device is provided with a waste port (10), which is arranged below the tool (6) and penetrates the main body of the device in the vertical direction to recover waste generated during cutting.

6. A method for curve cutting feed, characterized in that: Using the multi-station tool rotary curve cutting feed device according to any one of claims 1-5, the feed motor (8) drives the linkage feed drive mechanism (4) to move up and down, thereby driving the linear lifting motion of the movable table (7). The movable table (7) drives the lower end block (34) of the X-type lifting feed mechanism (3) to move up and down. The lifting of the lower end block (34) causes the angle of the transmission linkage (31) to change, resulting in a change in the distance of the symmetrical tool (6) fixed on the X-type lifting feed mechanism (3).

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