Double slide plate structure for double drive constant tension workbench

Abstract

The utility model discloses a double slide plate structure for double drive constant tension workstation, including X axle drive mechanism, X axle drive mechanism transmission connection is used for installing A axle head frame's X axle slide plate, X axle drive mechanism can drive X axle slide plate and move along the axial movement, X axle slide plate still is connected with the U axle transmission mechanism for installing C axle tailstock's U axle slide plate, U axle transmission mechanism can drive X axle slide plate and U axle slide plate and move along the axial relative movement. Can solve the problem that the traditional slide plate exists under the constant tension working condition and connects the interface micro - movement, the body deformation is big, the dynamic rigidity is insufficient, and the blade double drive stretching clamping device of adaptation constant tension controllable is guaranteed blade processing process's tension control precision and movement positioning precision.

Description

Technical Field

[0001] This utility model relates to a double-slide structure for a dual-drive constant tension worktable, belonging to the field of CNC machine tool technology. Background Technology

[0002] In the machining of thin-walled curved surface parts such as aero-engine blades, to overcome the problems of insufficient rigidity and easy vibration caused by the traditional "one clamp, one support" clamping method, the related technology (CN120461140A) proposes a high-precision five-axis linkage machining device for complex surfaces. The X-axis motor and U-axis motor are both connected to the machine bed. Workpiece fixtures are set on opposite sides of the C-axis and A-axis. The bottom of the C-axis and A-axis are respectively connected to the U-axis nut and X-axis nut. The output ends of the X-axis motor and U-axis motor are connected to the X-axis ball screw and U-axis ball screw respectively via couplings. The X-axis ball screw and U-axis ball screw are transmitted through ball joints with the X-axis nut and U-axis nut respectively. The C-axis and A-axis are slidably connected to the corresponding X-axis guide rails on both sides. This allows for adjustment of the workpiece length during operation by moving the A-axis along the X-axis via the X-axis motor and moving the C-axis via the U-axis motor.

[0003] In this type of constant tension worktable, the slide plate used to support the A-axis headstock and C-axis tailstock is a key functional component. It must not only achieve high-precision feed in the X-axis direction, but also withstand and stably transmit a controllable, bidirectional, closed-loop constant axial tension acting between the two spindle heads over a long period. This places unprecedentedly stringent requirements on the slide plate structure. Traditional machine tool slide plate designs primarily consider resisting cutting forces and ensuring motion accuracy. Their structures (such as the tension application point of split connections), body rigidity, and transmission systems generally suffer from the following shortcomings when dealing with this continuous, closed axial tension: fretting wear occurs at the connection interface due to alternating tension, leading to tension fluctuations; the slide plate body deforms due to insufficient rigidity or stress concentration, affecting positioning accuracy; and the overall dynamic rigidity is insufficient to meet the requirements of high-stability machining. Therefore, there is an urgent need to design a dedicated high-performance double slide plate structure that can perfectly adapt to constant tension conditions. Utility Model Content

[0004] The purpose of this utility model is to provide a double-slide structure for a dual-drive constant tension worktable, which can solve the problems of micro-movement at the connection interface, large deformation of the body, and insufficient dynamic rigidity of traditional slides under constant tension conditions. It is compatible with a constant tension controllable blade dual-drive stretching clamping device to ensure the tension control accuracy and motion positioning accuracy during blade processing.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A dual-slide structure for a dual-drive constant tension worktable includes an X-axis transmission mechanism, which is driven to an X-axis slide for mounting an A-axis headstock. The X-axis transmission mechanism can drive the X-axis slide to move axially. The X-axis slide is also connected to a U-axis slide for mounting a C-axis tailstock via a U-axis transmission mechanism, which can drive the X-axis slide and the U-axis slide to move relative to each other axially.

[0007] Alternatively, both the X-axis slide and the U-axis slide may be equipped with a positioning mechanism that matches the A-axis headstock or the C-axis tailstock.

[0008] Optionally, the top of the X-axis slide and the U-axis slide are provided with keyways for positioning the A-axis headstock or the C-axis tailstock and screw holes for locking and fixing.

[0009] The positioning mechanism includes a positioning key that engages with a keyway to position the A-axis headstock or C-axis tailstock, and a double-ended stud for locking with the A-axis headstock or C-axis tailstock.

[0010] Alternatively, the X-axis slide and / or U-axis slide may have a hollow structure inside for weight reduction and dispersing of constant axial tension.

[0011] Optionally, the X-axis transmission mechanism includes an X-axis servo motor mounted on the worktable, the X-axis servo motor being connected to an X-axis lead screw for transmitting power, an X-axis lead screw nut being screwed onto the X-axis lead screw, and a lead screw seat for supporting the X-axis lead screw being provided at the end of the X-axis lead screw; the bottom of the X-axis slide plate is provided with a nut seat mounting cavity adapted to the X-axis lead screw nut.

[0012] Alternatively, the U-axis transmission mechanism includes a U-axis servo motor connected to a U-axis slide plate, the U-axis servo motor being connected to a U-axis lead screw for transmitting torque, a nut sleeve being screwed onto the end of the U-axis lead screw, and the nut sleeve being connected to the X-axis slide plate; the bottom of the U-axis slide plate is provided with a U-axis motor mounting cavity for mounting the U-axis servo motor.

[0013] Alternatively, the right side of the X-axis slide plate is provided with an integrated flange for connection with the nut sleeve.

[0014] Optionally, a guide mechanism is also provided between the bottom of the X-axis slide and the U-axis slide and the worktable.

[0015] Alternatively, the guiding mechanism may include a roller slider and a guide rail fixed to the worktable, wherein the roller slider cooperates with the guide rail.

[0016] Optionally, the bottom sides of the X-axis slide and the U-axis slide are provided with slide block mounting cavities for mounting roller slides.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0018] 1. This utility model provides a dual-slide structure for a dual-drive constant tension worktable, which separates the feed motion and tension adjustment motion into two independent execution units on the X-axis and U-axis. This allows the high-precision displacement required for cutting feed and the stable load transmission required for constant tension to proceed without interference, separating the force paths of the two working conditions from the structural layout. The split slide design can disperse the concentrated stress caused by continuous axial tension, improve the overall structural rigidity and deformation resistance of the slide, reduce structural deformation under long-term alternating loads, and maintain machining positioning accuracy. The independent transmission and split load-bearing design can reduce fretting wear at the connection interface, reduce the tension fluctuation amplitude, improve the overall dynamic rigidity, and adapt to the high-stability constant tension working conditions required for machining thin-walled parts such as aero-engine blades.

[0019] 2. This utility model provides a double-slide structure for a dual-drive constant tension worktable. The integrated flange of the X-axis slide and the nut sleeve of the U-axis form a gapless rigid connection, eliminating the mating surface in traditional split connections. Structurally, this eliminates the risk of fretting wear and loosening under long-term bidirectional alternating tension, ensuring the absolute stability of the tension transmission path. The slide body adopts a hollow optimized design, which significantly reduces the mass of moving parts and the moment of inertia while ensuring the load-bearing rigidity of key parts. At the same time, this structure is conducive to the uniform distribution and transmission of axial constant tension, reducing the risk of deformation caused by local stress concentration, and is suitable for high-speed machining requirements. High-rigidity roller guides are used as guides, combined with pre-tightened precision lead screw transmission, to synergistically improve dynamic rigidity and load transmission stability, effectively resist cutting forces and constant tension deformation, and ensure long-term machining accuracy. It is suitable for high-precision, high-speed machining of thin-walled blades such as aero-engine blades. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the top of the overall structure of the double sliding plate of this utility model;

[0021] Figure 2 This is a schematic diagram of the bottom of the overall structure of the double sliding plate of this utility model;

[0022] Figure 3 This is a schematic diagram of the top structure of the X-axis sliding plate of this utility model;

[0023] Figure 4 This is a schematic diagram of the bottom structure of the X-axis sliding plate of this utility model;

[0024] Figure 5 This is a schematic diagram of the bottom structure of the U-axis sliding plate of this utility model;

[0025] Figure 6 This is a schematic diagram of the present invention assembled with the A-axis headstock and the C-axis tailstock.

[0026] In the diagram: 1-X-axis slide plate, 101-keyway, 102-screw hole, 103-hollow structure, 104-integral flange, 105-nut seat mounting cavity, 106-slider mounting cavity, 2-U-axis slide plate, 201-U-axis motor mounting cavity, 3-X-axis transmission mechanism, 301-X-axis servo motor, 302-X-axis lead screw, 303-X-axis lead screw nut, 304-lead screw seat, 4-U-axis transmission mechanism, 401-U-axis servo motor, 402-U-axis lead screw, 403-nut sleeve, 5-positioning mechanism, 501-positioning key, 502-double-ended stud, 6-guide mechanism, 601-roller slider, 602-guide rail, 7-A-axis headstock, 8-C-axis tailstock. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. It should be noted that, except for dependent embodiments, any embodiment exists independently, and its implementation or non-implementation does not affect the integrity of the remaining embodiments, nor does the implementation or non-implementation of dependent embodiments affect the integrity of the original embodiments.

[0029] A double-slide structure for a dual-drive constant tension worktable, such as Figures 1-6 As shown, it includes an X-axis transmission mechanism 3, which is connected to an X-axis slide plate 1 for mounting the A-axis headstock 7. The X-axis transmission mechanism 3 can drive the X-axis slide plate 1 to move axially. The X-axis slide plate 1 is also connected to a U-axis slide plate 2 for mounting the C-axis tailstock 8 via a U-axis transmission mechanism 4. The U-axis transmission mechanism 4 can drive the X-axis slide plate 1 and the U-axis slide plate 2 to move relative to each other axially.

[0030] This design incorporates an axially movable X-axis slide plate 1 for mounting the A-axis headstock 7. The X-axis transmission mechanism 3 provides stable axial feed power to the X-axis slide plate 1, ensuring precise position adjustment and feed motion of the A-axis headstock 7 during machining. The X-axis slide plate 1 is connected to the U-axis slide plate 2, which mounts the C-axis tailstock 8, via a U-axis transmission mechanism 4. The U-axis transmission mechanism 4 drives the two slide plates to achieve controllable relative axial displacement, thereby forming a stable and adjustable closed axial force range between the A-axis headstock 7 and the C-axis tailstock 8, continuously transmitting bidirectional controllable constant axial tension. Furthermore, the distance between the A-axis headstock 7 and the C-axis tailstock 8 can be pre-adjusted according to the workpiece length before machining to accommodate workpieces of different lengths, improving the table's adaptability. The two slide plates, relying on their respective transmission mechanisms, form an independent yet interconnected motion system, capable of supporting the headstock and tailstock respectively and collaboratively applying displacement and tension, avoiding the structural burden of a single slide plate bearing both feed motion and constant tension load simultaneously. X-axis slide 1 is responsible for the axial feed and positioning of the entire machine, while U-axis slide 2 works in conjunction to achieve relative displacement between the headstock and tailstock to establish a closed constant tension. Both slides share the same axial reference but possess independent motion and force systems, ensuring high-precision X-axis feed while stably transmitting continuous and controllable bidirectional axial tension, balancing motion accuracy and load stability. Compared to traditional single slides or split-connection slides, this structure fundamentally improves the problems of fretting wear stress concentration and insufficient rigidity caused by continuous closed tension, enhancing the long-term working stability and machining accuracy of the worktable.

[0031] As another specific implementation, both the X-axis slide plate 1 and the U-axis slide plate 2 are equipped with positioning mechanisms 5 that match the A-axis head frame 7 or the C-axis tail frame 8. These mechanisms are used to accurately position and fix the A-axis head frame 7 or the C-axis tail frame 8, ensuring the installation symmetry and coaxiality of the A-axis head frame 7 and the C-axis tail frame 8, and avoiding the effect of tension application due to installation deviations.

[0032] As another specific implementation, the top ends of the X-axis slide plate 1 and the U-axis slide plate 2 are provided with keyways 101 for positioning the A-axis headstock 7 or the C-axis tailstock 8 and screw holes 102 for locking and fixing.

[0033] The positioning mechanism 5 includes a positioning key 501 that engages with the keyway 101 to position the A-axis headstock 7 or the C-axis tailstock 8, and a double-ended stud 502 for locking with the A-axis headstock 7 or the C-axis tailstock 8.

[0034] The positioning key 501 ensures that the A-axis headstock 7 is consistent with the installation reference, and the double-ended stud 502 achieves a stable connection between the slide plate and the load-bearing component, avoiding relative displacement under constant tension. The keyway 101 and the positioning key 501 of the positioning mechanism 5 precisely cooperate to ensure that the installation references of the A-axis headstock 7 and the C-axis tailstock 8 are consistent; through the screw hole 102 and the double-ended stud 502, the A-axis headstock 7 and the C-axis tailstock 8 are firmly locked to the top of the X-axis slide plate 1 and the U-axis slide plate 2, even under long-term bidirectional closed axial constant tension, which can effectively avoid relative displacement under axial constant tension, ensuring clamping stability and machining accuracy.

[0035] As another specific implementation, the X-axis slide plate 1 and / or the U-axis slide plate 2 are provided with a hollow structure 103 for weight reduction and dispersing axial constant tension. Without reducing structural strength, the weight of the slide plate can be reduced, motion inertia can be reduced, and axial constant tension can be dispersed, reducing the risk of body deformation.

[0036] In another specific embodiment, the X-axis transmission mechanism 3 includes an X-axis servo motor 301 mounted on a worktable. The X-axis servo motor 301 is connected to an X-axis lead screw 302 for transmitting power. An X-axis lead screw nut 303 is screwed onto the X-axis lead screw 302. The end of the X-axis lead screw 302 is provided with a lead screw seat 304 for supporting the X-axis lead screw 302. The bottom of the X-axis slide plate 1 is provided with a nut seat mounting cavity 105 adapted to the X-axis lead screw nut 303. The X-axis servo motor 301 of the X-axis transmission mechanism 3 provides precise driving force for axial feed, thereby effectively eliminating transmission backlash in the X-axis lead screw 302 and accurately transmitting power to the X-axis lead screw nut 303, thereby driving the X-axis slide plate 1 to achieve high-precision X-axis feed positioning along the guide rail 602; it plays a stable supporting role and further improves the rigidity and stability during the transmission process. The nut seat mounting cavity 105 at the bottom of the X-axis slide plate 1 is equipped with the X-axis lead screw nut 303, which efficiently transmits power to the X-axis lead screw 302 of the X-axis transmission mechanism 3.

[0037] In another specific embodiment, the U-axis transmission mechanism 4 includes a U-axis servo motor 401 connected to the U-axis slide plate 2. The U-axis servo motor 401 is connected to a U-axis lead screw 402 for transmitting torque. A nut sleeve 403 is screwed onto the end of the U-axis lead screw 402, and the nut sleeve 403 is connected to the X-axis slide plate 1. The bottom of the U-axis slide plate 2 is provided with a U-axis motor mounting cavity 201 for mounting the U-axis servo motor 401. The U-axis servo motor 401 of the U-axis transmission mechanism 4 can output a constant torque. Through the mechanical cooperation between the U-axis lead screw 402 and the nut sleeve 403, the torque is efficiently converted into a constant axial tension. The U-axis motor mounting cavity 201 provides a stable mounting space for the U-axis servo motor 401, ensuring the stability of the power source during operation.

[0038] In another specific embodiment, the right side of the X-axis slide plate 1 is provided with an integrated flange 104 for connection with the nut sleeve 403. The tension is transmitted to the X-axis slide plate 1 through the integrated flange 104, and then evenly applied between the A-axis headstock 7 and the C-axis tailstock 8, keeping the blade in a stable tensile state, significantly enhancing the rigidity of the blade during machining, and suppressing vibration and deformation. The integrated flange 104 is rigidly connected to the nut sleeve 403 of the U-axis transmission mechanism 4 without clearance, eliminating the potential for interface fretting in traditional connections and ensuring stable tension transmission.

[0039] As another specific implementation, a guide mechanism 6 is also provided between the bottom of the X-axis slide plate 1 and the U-axis slide plate 2 and the worktable. The guide mechanism 6 can ensure the straightness of the motion trajectory, greatly reduce the offset error, and make the operation smooth and stable. It can also realize large-stroke reciprocating linear motion to meet the transmission requirements of long-distance displacement.

[0040] In another specific embodiment, the guiding mechanism 6 includes a roller slider 601 and a guide rail 602 fixed to the worktable, wherein the roller slider 601 and the guide rail 602 cooperate. The high-rigidity roller slider 601 of the guiding mechanism 6 and the guide rail 602 fixed to the bed form a low-friction, high-precision sliding fit, providing stable guidance for the sliding of the X-axis slide plate 1 and the U-axis slide plate 2; the roller structure design greatly improves the load-bearing capacity and motion accuracy, and can fully adapt to the stable guidance requirements under constant tension conditions, reducing friction loss and vibration interference during the sliding process.

[0041] In another specific embodiment, the bottom sides of the X-axis slide plate 1 and the U-axis slide plate 2 are provided with slide plate mounting cavities 106 for mounting roller slide plates 601. The roller slide plates 601 of the guide mechanism 6 are mounted in the slide plate mounting cavities 106 on both sides of the bottom to ensure that the X-axis slide plate 1 slides smoothly and accurately along the guide rail 602.

[0042] The dual-slide structure for a dual-drive constant tension worktable provided in this embodiment operates as follows: First, the A-axis headstock 7 and C-axis tailstock 8 are fixed to the tops of the X-axis slide 1 and U-axis slide 2 respectively by the positioning mechanism 5. The positioning key 501 ensures consistent installation reference, and the double-ended stud 502 is used to lock and fix the structure, preventing clamping deviation. The X-axis servo motor 301 is started, and through the cooperation of the X-axis lead screw 302 and X-axis lead screw nut 303, the X-axis slide 1 is driven to feed axially along the guide rail 602, achieving precise positioning of the machining position. Subsequently, the U-axis servo motor 401 is started. The constant output torque is converted into axial displacement between the U-axis servo motor 401 and the nut sleeve 403 via the U-axis lead screw 402 and nut sleeve 403. This displacement is then transmitted to the X-axis slide plate 1 through the integrated flange 104, and then applied between the A-axis headstock 7 and the C-axis tailstock 8. The blade is stretched to a set rigidity state by using constant axial tension. During the processing, the roller slider 601 of the guide mechanism 6 cooperates with the guide rail 602 to ensure smooth sliding of the slide plate. The hollow structure 103 continuously disperses the tension, reduces the weight of the slide plate, and avoids deformation of the body. The tension control accuracy and motion positioning accuracy are ensured throughout the process.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. The present utility model extends to any new features or combinations disclosed in this specification, and any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model. It is obvious to those skilled in the art that the present utility model is not limited to the details of the above exemplary embodiments, and that detailed technical features not disclosed in this embodiment, such as specific structures, are all prior art and can be obtained by those skilled in the art from the prior art; the connection method can be a fixed connection, a detachable connection, or an integral part; it can be a fixed connection, a movable connection, or a hinged connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific manner of the above terms in the embodiments of the present utility model according to the specific circumstances, and the present disclosure does not specifically limit this aspect.

Claims

1. A double-slide structure for a dual-drive constant tension worktable, characterized in that: Includes an X-axis transmission mechanism (3), which is connected to an X-axis slide plate (1) for mounting the A-axis headstock (7). The X-axis transmission mechanism (3) can drive the X-axis slide plate (1) to move axially. The X-axis slide plate (1) is also connected to a U-axis slide plate (2) for mounting the C-axis tailstock (8) via a U-axis transmission mechanism (4). The U-axis transmission mechanism (4) can drive the X-axis slide plate (1) and the U-axis slide plate (2) to move relative to each other axially.

2. The double-slide structure for a dual-drive constant tension worktable according to claim 1, characterized in that: Both the X-axis slide (1) and the U-axis slide (2) are equipped with positioning mechanisms (5) that match the A-axis head frame (7) or the C-axis tail frame (8).

3. The double-slide structure for a dual-drive constant tension worktable according to claim 2, characterized in that: The top of the X-axis slide plate (1) and the U-axis slide plate (2) are provided with a keyway (101) for positioning the A-axis headstock (7) or the C-axis tailstock (8) and a screw hole (102) for locking and fixing. The positioning mechanism (5) includes a positioning key (501) that engages with a keyway (101) to position the A-axis headstock (7) or the C-axis tailstock (8) and a double-ended stud (502) for locking with the A-axis headstock (7) or the C-axis tailstock (8).

4. The double-slide structure for a dual-drive constant tension worktable according to claim 1, characterized in that: The X-axis slide plate (1) and / or U-axis slide plate (2) are provided with a hollow structure (103) for weight reduction and dispersion of axial constant tension.

5. The double-slide structure for a dual-drive constant tension worktable according to claim 1, characterized in that: The X-axis transmission mechanism (3) includes an X-axis servo motor (301) mounted on the workbench. The X-axis servo motor (301) is connected to an X-axis lead screw (302) for transmitting power. An X-axis lead screw nut (303) is screwed onto the X-axis lead screw (302). A lead screw seat (304) for supporting the X-axis lead screw (302) is provided at the end of the X-axis lead screw (302). The bottom of the X-axis slide plate (1) is provided with a nut seat mounting cavity (105) adapted to the X-axis lead screw nut (303).

6. The double-slide structure for a dual-drive constant tension worktable according to claim 1, characterized in that: The U-axis transmission mechanism (4) includes a U-axis servo motor (401) connected to the U-axis slide plate (2). The U-axis servo motor (401) is connected to a U-axis lead screw (402) for transmitting torque. A nut sleeve (403) is screwed onto the end of the U-axis lead screw (402). The nut sleeve (403) is connected to the X-axis slide plate (1). The bottom of the U-axis slide plate (2) is provided with a U-axis motor mounting cavity (201) for mounting the U-axis servo motor (401).

7. The double-slide structure for a dual-drive constant tension worktable according to claim 6, characterized in that: The right side of the X-axis slide plate (1) is provided with an integral flange (104) for connection with the nut sleeve (403).

8. The double-slide structure for a dual-drive constant tension worktable according to claim 1, characterized in that: A guide mechanism (6) is also provided between the bottom of the X-axis slide (1) and the U-axis slide (2) and the worktable.

9. The double-slide structure for a dual-drive constant tension worktable according to claim 8, characterized in that: The guiding mechanism (6) includes a roller slider (601) and a guide rail (602) fixed on the worktable, wherein the roller slider (601) cooperates with the guide rail (602).

10. The double-slide structure for a dual-drive constant tension worktable according to claim 9, characterized in that: The bottom sides of the X-axis slide (1) and the U-axis slide (2) are provided with slide mounting cavities (106) for mounting roller slides (601).

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