Workpiece fixture turntable

Abstract

The utility model relates to numerical control machine tool technical field discloses a work piece fixed turntable. In the application a kind of work piece fixed turntable includes: workbench, bottom plate, first vertical plate, first motor, first speed reducer, second vertical plate, rotating seat, support plate, second speed reducer, second motor, chuck, the work piece fixed turntable of the application, by the work piece turntable whole setting in independent X axis drive track, realized work piece linear movement in X axis direction and the decoupling of turntable self rotation movement. Turntable (A axis) no longer need to be compensated X axis displacement and carry out frequent rotation adjustment, it only needs to focus on completing the established rotation indexing task. This greatly reduces the load and wear of turntable, especially avoids the precision decay and mechanical fatigue caused by composite motion when it bears lateral cutting force, effectively prolongs the service life of turntable.

Description

Technical Field

[0001] This application relates to the field of CNC machine tool technology, for example to a workpiece fixing turntable. Background Technology

[0002] The descriptions in this section are provided only as background information relating to this disclosure and do not constitute prior art.

[0003] A five-axis vertical machining center is a type of CNC machine tool widely used in precision machining. It achieves efficient machining of complex curved workpieces through the linkage of multiple motion axes. In this type of equipment, the workpiece is usually fixed on a rotary table, which is mounted on a drive guide rail that moves along the Y-axis. The rotational motion of the rotary table (usually defined as the A-axis or C-axis) combined with the movement of the spindle in the Z-axis direction completes the multi-angle machining of the workpiece.

[0004] In existing structures, X-axis position adjustment mainly relies on rotary table rotation, which has a long kinematic chain, significant error accumulation, and insufficient dynamic stiffness, making it difficult to meet the demands of high-speed and high-precision machining. Therefore, there is an urgent need for structural improvements to reduce the rotary table load and optimize motion distribution, thereby improving the machining efficiency and accuracy stability of the machine tool. Utility Model Content

[0005] This application provides a workpiece fixing turntable. By mounting the entire workpiece turntable on an independent X-axis drive track, the linear movement of the workpiece in the X-axis direction and the rotational motion of the turntable itself are decoupled. The turntable (A-axis) no longer needs to be frequently rotated to compensate for X-axis displacement; it only needs to focus on completing the predetermined rotational indexing task. This greatly reduces the load and wear on the turntable, especially avoiding the accuracy degradation and mechanical fatigue caused by compound motion when subjected to lateral cutting forces, effectively extending the service life of the turntable.

[0006] A workpiece fixing turntable includes: a worktable, a base plate, a first vertical plate, a first motor, a first reducer, a second vertical plate, a rotating seat, a support plate, a second reducer, a second motor, and a chuck; The worktable is set on the X-axis drive rail, which is set on the Y-axis drive rail. The worktable is a metal table with multiple fixing slots on its upper part arranged in the X direction. The fixing slots are used to fix base plates of different models and sizes.

[0007] The base plate is detachably fixed to the worktable. The base plate is a metal plate with connecting holes. The connecting holes and the fixing groove are connected by a slider and a fastening nut. The slider slides in the fixing groove, and the fastening nut is used to fix the base plate and the slider.

[0008] The first upright plate is fixed to one side of the upper part of the base plate; The first motor is fixed to the upper outer side of the first upright plate; The first speed reducer is located on the inner side of the upper part of the first vertical plate and is connected to the first motor for transmission. The second upright plate is fixed to the other side of the upper part of the base plate; The rotating seat is rotatably mounted on the inner upper part of the second vertical plate; The support plate is connected to the first reducer and the rotating seat at both ends, and rotates along axis A. The second reducer is located on the upper side of the middle of the support plate; The second motor is located on the lower side of the middle part of the support plate and is connected to the second reducer for transmission. The chuck, mounted on the second reduction mechanism, is used to fix the workpiece.

[0009] By mounting the entire workpiece turntable on an independent X-axis drive track, the linear movement of the workpiece in the X-axis direction is decoupled from the rotational motion of the turntable itself. The turntable (A-axis) no longer needs frequent rotational adjustments to compensate for X-axis displacement; it can focus solely on completing its predetermined rotary indexing task. This significantly reduces the load and wear on the turntable, especially preventing accuracy degradation and mechanical fatigue caused by combined motion when subjected to lateral cutting forces, effectively extending the turntable's service life.

[0010] The dual rotary axis design (A-axis and C-axis, achieved through a second motor, a second reducer, and a chuck) enables the workpiece to achieve complex multi-angle positioning. Combined with independent X and Y-axis linear motion, the machine tool can employ optimized toolpaths and cutting postures, reducing tool overhang and improving cutting conditions. This not only allows for the machining of more complex curved surface parts but also reduces the number of tool changes and idle travel time during machining, thereby improving overall machining efficiency and process adaptability.

[0011] In some embodiments, the X-axis drive track includes: The support base has an inverted trapezoidal structure and a first mounting groove at the top. The first screw is rotatably mounted on the first mounting slot, with the X-axis direction set. The first rotary power mechanism is fixedly installed on the first mounting slot and connected to the first screw. There are two connecting plates, which are respectively located on both sides of the upper part of the support base; The first slide rail is fixedly mounted on the connecting plate; The lower part of the I-beam is slidably connected to the first slide rail via a slider, and the upper part is connected to both sides of the bottom of the worktable. The connecting seat is fixedly installed at the bottom center of the workbench, and has a screw hole that mates with the screw thread.

[0012] In some embodiments, the Y-axis drive track includes: The base is fixed to the ground by support legs, and a second mounting groove is provided in the middle of its upper part; The second screw is rotatably mounted on the second mounting slot, with its Y-axis direction set. The second rotary power mechanism is fixedly installed on the second mounting slot and connected to the second screw. The second slide rail is fixedly installed on both sides of the upper part of the base and slides in conjunction with the slide groove at the bottom of the support.

[0013] In some embodiments, the workpiece fixing turntable further includes: The first main grating ruler is fixed to the upper part of the outer side wall of the base; The first reading head is fixedly installed at the bottom of the support base and works in conjunction with the first main grating ruler.

[0014] In some embodiments, the workpiece fixing turntable further includes: The second main grating ruler is fixed to the upper part of the outer wall of the support base; The second reading head is fixedly mounted on the side wall of the workbench by a bracket and works in conjunction with the second main grating ruler. The shielding plate is located above the second main grating ruler and is connected to the support base or integrated with the connecting plate.

[0015] Both the X-axis and Y-axis drive tracks employ high-rigidity support structures (such as support bases and bases) and precision transmission components (such as screws and slide rails). Each linear axis is equipped with a linear encoder measurement system (first and second main linear encoders and reading heads), forming a fully closed-loop control system. This system can detect and compensate for positional errors caused by thermal expansion and wear of the lead screw in real time, directly measuring the actual position, eliminating transmission chain errors, greatly enhancing the system's anti-interference capability, and ensuring machining stability and consistency under long-term, heavy-load, and high-speed cutting conditions.

[0016] The grating ruler is equipped with a shield to protect chips and coolant, thus improving the reliability of the equipment.

[0017] In some embodiments, the chuck includes a three-axis chuck and a four-axis chuck.

[0018] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are considered similar elements. The drawings do not constitute a limitation of scale, and wherein: Figure 1 This is a schematic diagram of a three-dimensional structure of a workpiece fixing turntable provided in an embodiment of this disclosure; Figure 2 yes Figure 1 A magnified view of part A in the diagram; Figure 3 This is a rear view structural schematic diagram of a workpiece fixing turntable provided in an embodiment of this disclosure; Figure 4 This is a right-side view of a workpiece fixing turntable provided in an embodiment of this disclosure; Figure 5 This is a top view schematic diagram of a workpiece fixing turntable provided in an embodiment of this disclosure.

[0020] Figure label: 11. Workbench; 12. Base plate; 13. First vertical plate; 14. First motor; 15. First reducer; 16. Chuck; 17. Support plate; 18. Second vertical plate; 19. Rotating seat; 20. Second motor; 21. First screw; 22. Support seat; 23. First slide rail; 24. First rotary power mechanism; 25. Connecting plate; 26. I-beam; 27. Base; 28. Second rotary power mechanism; 29. ​​Second slide rail; 31. First main grating ruler; 32. First reading head; 33. Second main grating ruler; 34. Second reading head. Detailed Implementation

[0021] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0022] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0023] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better describing the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this disclosure according to the specific circumstances.

[0024] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0025] Unless otherwise stated, the term "multiple" means two or more.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0027] Combination Figure 1-5 As shown, this embodiment of the present disclosure provides a workpiece fixing turntable, including: a worktable 11, a base plate 12, a first vertical plate 13, a first motor 14, a first reducer 15, a second vertical plate 18, a rotating seat 19, a support plate 17, a second reducer, a second motor 20, and a chuck 16. The worktable 11 is set on the X-axis drive rail, which is set on the Y-axis drive rail. The worktable 11 is a metal table with multiple X-axis mounting slots on its upper side, such as four evenly spaced mounting slots.

[0028] The base plate 12 is detachably fixed on the worktable 11. The base plate 12 is provided with multiple connection holes, which are detachably connected to some mounting slots through connectors. For example, if the mounting slot is a T-shaped slide, the connector can be a T-shaped slider.

[0029] The first upright plate 13 is fixed to one side of the upper part of the base plate 12; The first motor 14 is fixed to the upper outer side of the first upright plate 13; the motor can be a servo motor.

[0030] The first reducer 15 is located on the inner side of the upper part of the first vertical plate 13 and is connected to the first motor 14 for transmission. The reducer can be a worm gear reducer with a self-locking function.

[0031] The second upright plate 18 is fixed to the other side of the upper part of the base plate 12 and is arranged opposite to the first upright plate 13; Rotary seat 19 is rotatably mounted on the inner side of the upper part of the second vertical plate 18; The support plate 17 is connected at both ends to the first reducer 15 and the rotating seat 19, respectively, and rotates along the A-axis. The output shaft of the first reducer 15 and the rotating seat 19 are connected to the support plate 17 via a fixed bracket. The fixed bracket includes a square metal plate and a fixed vertical plate perpendicularly connected to it. The fixed vertical plate is connected to the support plate 17, and the square metal plate is connected to either the output shaft of the first reducer 15 or the rotating seat 19. The first motor 14 drives the support plate 17 to rotate via the first reducer 15. The A-axis is a rotating axis that rotates around the X-axis.

[0032] The second reducer is located on the upper side of the middle part of the support plate 17; The second motor 20 is located on the lower side of the middle part of the support plate 17 and is connected to the second reducer for transmission. The chuck 16, mounted on the second reduction mechanism, is used to fix the workpiece. The chuck 16 can be a four-jaw chuck 16 or a three-jaw chuck 16.

[0033] By mounting the entire workpiece turntable on an independent X-axis drive track, the linear movement of the workpiece in the X-axis direction is decoupled from the rotational motion of the turntable itself. The turntable (A-axis) no longer needs frequent rotational adjustments to compensate for X-axis displacement; it can focus solely on completing its predetermined rotary indexing task. This significantly reduces the load and wear on the turntable, especially preventing accuracy degradation and mechanical fatigue caused by combined motion when subjected to lateral cutting forces, effectively extending the turntable's service life.

[0034] The dual rotary axis design (A-axis and C-axis, achieved through a second motor 20, a second reducer, and a chuck 16) enables the workpiece to achieve complex multi-angle positioning. Combined with independent X and Y-axis linear motion, the machine tool can employ optimized toolpaths and cutting postures, reducing tool overhang and improving cutting conditions. This not only allows for the machining of more complex curved surfaces but also reduces the number of tool changes and idle travel time during machining, thereby improving overall machining efficiency and process adaptability. The C-axis is a rotary axis that rotates around the Z-axis.

[0035] In some embodiments, the X-axis drive track includes: Support base 22 has an inverted trapezoidal structure and a first mounting groove at the top; The first screw 21 is rotatably mounted on the first mounting slot, with the X-axis direction set. The first rotary power mechanism 24 is fixedly installed on the first mounting slot and connected to the first screw 21; the rotary power mechanism can be a hydraulic motor or an electric motor.

[0036] Two connecting plates 25 are provided, respectively located on both sides of the upper part of the support base 22; The first slide rail 23 is fixedly mounted on the connecting plate 25; The lower part of the I-beam 26 is slidably connected to the first slide rail 23 via a slider, and the upper part is connected to both sides of the bottom of the worktable 11. The connecting seat is fixedly installed at the bottom center of the workbench 11, and has a screw hole that mates with the screw thread.

[0037] In some embodiments, the Y-axis drive track includes: The base 27 is fixed to the ground by support legs, and a second mounting groove is provided in the middle of its upper part; The second screw is rotatably mounted on the second mounting slot, with its Y-axis direction set. The second rotary power mechanism 28 is fixedly installed on the second mounting slot and connected to the second screw. The second slide rail 29 is fixedly installed on both sides of the upper part of the base 27 and slides in cooperation with the slide groove at the bottom of the support base 22.

[0038] In some embodiments, the workpiece fixing turntable further includes: The first main grating ruler 31 is fixed to the upper part of the outer side wall of the base 27; The first reading head 32 is fixedly installed at the bottom of the support base 22 and cooperates with the first main grating ruler 31.

[0039] In some embodiments, the workpiece fixing turntable further includes: The second main grating ruler 33 is fixed to the upper part of the outer side wall of the support base 22; The second reading head 34 is fixedly mounted on the side wall of the workbench 11 by a bracket and cooperates with the second main grating ruler 33. The shielding plate is located above the second main grating ruler 33 and is connected to the support base 22 or integrally set with the connecting plate 25.

[0040] Both the X-axis and Y-axis drive tracks employ high-rigidity support structures (such as support base 22 and base 27) and precision transmission components (such as screws and slide rails). Each linear axis is equipped with a grating ruler measurement system (first and second main grating rulers 33 and reading heads), forming a fully closed-loop control system. This system can detect and compensate for positional errors caused by thermal expansion and wear of the lead screw in real time, directly measuring the actual position, eliminating transmission chain errors, greatly enhancing the system's anti-interference capability, and ensuring machining stability and consistency under long-term, heavy-load, and high-speed cutting conditions.

[0041] The grating ruler is equipped with a shield to protect chips and coolant, thus improving the reliability of the equipment.

[0042] In some embodiments, the chuck 16 includes a three-axis chuck 16 and a four-axis chuck 16.

[0043] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of this disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A workpiece fixing turntable, characterized in that, include: The worktable is set on the X-axis drive track, and the X-axis drive track is set on the Y-axis drive track; The base plate is detachably fixed to the workbench; The first upright plate is fixed to one side of the upper part of the base plate; The first motor is fixed to the upper outer side of the first upright plate; The first speed reducer is located on the inner side of the upper part of the first vertical plate and is connected to the first motor for transmission. The second upright plate is fixed to the other side of the upper part of the base plate; The rotating seat is rotatably mounted on the inner upper part of the second vertical plate; The support plate is connected to the first reducer and the rotating seat at both ends, and rotates along axis A. The second reducer is located on the upper side of the middle of the support plate; The second motor is located on the lower side of the middle part of the support plate and is connected to the second reducer for transmission. The chuck, mounted on the second reduction mechanism, is used to fix the workpiece.

2. The workpiece fixing turntable according to claim 1, characterized in that, The X-axis drive track includes: The support base has an inverted trapezoidal structure and a first mounting groove at the top. The first screw is rotatably mounted on the first mounting slot, with the X-axis direction set. The first rotary power mechanism is fixedly installed on the first mounting slot and connected to the first screw. There are two connecting plates, which are respectively set on both sides of the upper part of the support base; The first slide rail is fixedly mounted on the connecting plate; The lower part of the I-beam is slidably connected to the first slide rail via a slider, and the upper part is connected to both sides of the bottom of the worktable. The connecting seat is fixedly installed at the bottom center of the workbench, and has a screw hole that mates with the screw thread.

3. The workpiece fixing turntable according to claim 1, characterized in that, The Y-axis drive track includes: The base is fixed to the ground by support legs, and a second mounting groove is provided in the middle of its upper part; The second screw is rotatably mounted on the second mounting slot, with its Y-axis direction set. The second rotary power mechanism is fixedly installed on the second mounting slot and connected to the second screw. The second slide rail is fixedly installed on both sides of the upper part of the base and slides in conjunction with the slide groove at the bottom of the support.

4. A workpiece fixing turntable according to claim 3, characterized in that, Also includes: The first main grating ruler is fixed to the upper part of the outer wall of the base; The first reading head is fixedly mounted at the bottom of the support base and works in conjunction with the first main grating ruler.

5. A workpiece fixing turntable according to claim 2, characterized in that, Also includes: The second main grating ruler is fixed to the upper part of the outer wall of the support base; The second reading head is fixedly mounted on the side wall of the workbench by a bracket and works in conjunction with the second main grating ruler. The shielding plate is located above the second main grating ruler and is connected to the support base or integrated with the connecting plate.

6. A workpiece fixing turntable according to claim 1, characterized in that, The chucks include: three-axis chucks and four-axis chucks.

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