Five-axis cradle modular vertical machining center

Abstract

The utility model relates to metal cutting vertical processing technical field, and disclose a kind of five-axis cradle modular vertical machining center, comprising: mainframe part contains first automatic tool changer combination, lower part is separately provided with five-axis cradle, workbench and saddle, and first direct knot formula spindle head is additionally provided with outer end, three-axis transmission linear rail is additionally provided with lower part correspondence, and saddle lower part is additionally provided with base;Transmission part contains X-axis transmission, Y-axis transmission and Z-axis transmission, X-axis transmission contains locking nut, bearing seat forcing ring and other components, Y-axis transmission and Z-axis transmission also each contain corresponding components;This machining center retains three-axis vertical machining center high rigidity and high stability, also has five-axis machining performance, and complex parts can be clamped and processed once;Column and Z-axis transmission cooperation promote use flexibility;Transmission part uses commonality component, reduces part type, reduces cost, improves economy.

Description

Technical Field

[0001] This utility model relates to the field of vertical machining technology for metal cutting, specifically a five-axis cradle modular vertical machining center. Background Technology

[0002] In the field of metal cutting vertical machining center equipment, in order to meet the cutting needs of metal parts in mechanical manufacturing, especially the multi-faceted and high-precision machining needs of complex structural parts, there are two mainstream types of machining equipment on the market: one is a specially designed five-axis vertical machining center, and the other is a machine that adds a five-axis rotary table to the traditional three-axis vertical machining center to realize the five-axis linkage machining function. Both types of equipment are used in metal cutting scenarios and complete the milling and drilling processes of parts through multi-axis coordinated motion.

[0003] While existing five-axis vertical machining centers can process complex parts, some models do not fully leverage the high rigidity and operational stability advantages of three-axis vertical machining centers in their structural design. After prolonged high-frequency machining, insufficient rigidity can lead to fluctuations in machining accuracy. Furthermore, these machines have a high degree of overall structural integration, requiring the disassembly of multiple related components for repairs, making the process cumbersome and increasing maintenance difficulty. Additionally, the column and Z-axis drive structures of existing vertical machining centers are mostly fixed-fit designs, making it difficult for the Z-axis drive structure to adapt to column adjustment requirements. When users need to adjust the column height or machining stroke due to changes in workpiece size, they cannot choose to simply increase the column height while maintaining the same stroke, or to combine increasing the column height with extending the stroke. Instead, they must modify the entire machine, making it difficult to flexibly adapt to different machining scenarios. Therefore, a five-axis cradle modular vertical machining center is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a five-axis cradle modular vertical machining center, which solves the technical problem that requires disassembling multiple related components when a fault occurs and repairs are needed, resulting in cumbersome inspection steps and increased maintenance difficulty.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a five-axis cradle modular vertical machining center, comprising:

[0006] The main unit and the transmission unit include a first automatic tool changer assembly, a second automatic tool changer assembly is added to the inner cavity of the first automatic tool changer assembly, and a five-axis cradle, a worktable and a saddle are respectively provided in the lower part of the first automatic tool changer assembly. A first direct-drive spindle head is added to the outer end of the first automatic tool changer assembly, and a column is added to the outside of the first direct-drive spindle head. A three-axis transmission linear guide is added to the corresponding position at the lower part of the first direct-drive spindle head. A base is added to the lower part of the saddle, and a second direct-drive spindle head is added to the outside of the first direct-drive spindle head.

[0007] The transmission part includes X-axis transmission, Y-axis transmission and Z-axis transmission. The X-axis transmission includes a locking nut, bearing housing clamping ring, screw bearing, spacer ring, first tail end seat, guide rod anti-collision ring, guide rod bearing housing, coupling, motor mounting plate, oil seal, bearing spacer ring and first ball screw. The first ball screw and coupling are located on the outer sides of the guide rod bearing housing, and the motor mounting plate is located outside the coupling.

[0008] The Y-axis drive includes a locking nut, a bearing housing clamping ring, a screw bearing, a spacer ring, a guide rod anti-collision ring, a guide rod bearing housing, a coupling, an oil seal, a bearing spacer ring, a second tail end seat, a bearing clamping ring, a transmission box, a transmission seat cover, and a second ball screw. The second ball screw is located between the second tail end seat and the bearing clamping ring. The transmission box is connected to the outside of the bearing clamping ring, and the coupling is located in the inner cavity of the transmission seat cover.

[0009] Z-axis drive includes a locking nut, a bearing housing clamping ring, a screw bearing, a spacer ring, a guide rod anti-collision ring, a guide rod bearing housing, a coupling, an oil seal, a bearing spacer ring, a second tail end seat, a bearing clamping ring, a transmission box, a transmission seat cover, and a third ball screw, with the third ball screw located between the second tail end seat and the bearing clamping ring, and the locking nut located outside the bearing housing clamping ring.

[0010] The servo motor on the motor mounting plate drives the first ball screw to rotate via a coupling. The first ball screw drives the saddle to move linearly along the three-axis transmission rail. The saddle further drives the worktable and the five-axis cradle to move synchronously in the X direction to adjust the X-direction position of the workpiece. At the same time, the screw bearing, the first tail end seat and the bearing spacer ring support and position the first ball screw. The locking nut and the bearing seat clamping ring fix the position of the screw bearing. The guide rod anti-collision ring prevents collisions between moving parts, and the oil seal provides sealing protection.

[0011] The servo motor drives the second ball screw to rotate via a coupling. The second ball screw drives the saddle to move linearly along the three-axis transmission rail. The saddle further drives the worktable and the five-axis cradle to move synchronously in the Y direction to adjust the Y-axis position of the workpiece. At the same time, the screw bearing, the second tail end seat and the bearing spacer ring support and position the second ball screw. The locking nut, the bearing seat clamping ring and the bearing clamping ring fix the position of the screw bearing and related components. The transmission box and the transmission seat cover protect the Y-axis transmission components. The guide rod anti-collision ring prevents collisions between moving parts, and the oil seal provides sealing protection.

[0012] The servo motor drives the third ball screw to rotate via a coupling. The third ball screw drives the first or second direct-drive spindle head to move linearly along the column. The first or second direct-drive spindle head further drives the first or second automatic tool changer to move synchronously in the Z direction to adjust the spindle machining height and tool change position. At the same time, the screw bearing, the second tail end seat, and the bearing spacer ring support and position the third ball screw. The locking nut, bearing seat clamping ring, and bearing clamping ring fix the position of the screw bearing and related components. The transmission box and transmission seat cover protect the Z-axis transmission components. The guide rod anti-collision ring prevents collisions between moving parts, and the oil seal provides sealing protection.

[0013] The five-axis cradle drives the worktable to tilt, which, in conjunction with the linear motion of the X, Y, and Z axes, enables five-axis linkage machining of the workpiece. When it is necessary to change the machining tool, the first or second automatic tool changer moves with the first or second direct-drive spindle head to the tool change position to complete the tool change, thus adapting to different machining requirements.

[0014] Preferably, a turntable base plate is added to the bottom of the worktable, and the turntable base plate is synchronously set on the upper part of the saddle along with the worktable. The edge of the turntable base plate corresponds to and fits the bottom of the five-axis cradle. The integrated design of the turntable base plate and the worktable reduces the overall weight, allowing the torque of the original X-axis servo motor to still meet the motion requirements, without the need to increase the size of the X-axis servo motor to match the rated torque as in traditional vertical machining centers. The fit between the two allows for more stable motion coordination with the five-axis cradle.

[0015] Preferably, all couplings are diaphragm-type designs, with one end of each diaphragm-type coupling connected to the motor mounting plate of the X-axis drive and the transmission seat covers of the Y-axis and Z-axis drives, respectively. Diaphragm-type couplings possess high precision, high rigidity, and high speed characteristics, ensuring high-precision transmission for the X, Y, and Z-axis drive systems, reducing errors during transmission, and directly improving the overall machining accuracy of the machine tool. Through stable connection with the motor mounting plate of the X-axis drive and the transmission seat covers of the Y and Z axes, the stability and reliability of motion transmission across each axis are ensured, avoiding adverse effects on machining results caused by transmission disconnection or wobbling.

[0016] Preferably, the first tailstock in the X-axis drive and the second tailstock in the Y-axis and Z-axis drives all have lubrication channels in their inner cavities, and these lubrication channels extend axially along the first and second tailstocks, respectively. These lubrication channels continuously lubricate the transmission components surrounding the first tailstock in the X-axis drive and the second tailstock in the Y-axis and Z-axis drives, reducing frictional losses between components, lowering the heat generated by friction, and thus reducing the impact of thermal displacement on machine tool accuracy. Reduced frictional losses extend the service life of the transmission components, while ensuring smooth operation of each axis, preventing processing efficiency from being affected by component jamming, and improving the stability of machine tool operation.

[0017] Preferably, the screw bearings in the X-axis, Y-axis, and Z-axis drives are all angular contact bearings, and the angular contact bearings are tightly fitted with spacers in the X-axis, Y-axis, and Z-axis drives, respectively, with the spacers located inside the angular contact bearings. Angular contact bearings possess excellent support and positioning performance, effectively ensuring the rotational accuracy of the screws on each axis, directly improving the machine tool transmission accuracy, and providing a fundamental guarantee for high-precision machining. The tight fit between the spacers and the angular contact bearings further optimizes the stress state of the angular contact bearings, enhances their support stability, reduces vibration and errors during transmission, and ensures high precision and high stability of the X-axis, Y-axis, and Z-axis drives.

[0018] Preferably, the column in the main unit is a one-piece cast column, and the inner wall of the one-piece cast column is respectively fitted with the outer walls of the first and second direct-connected spindle heads. The bottom of the one-piece cast column is connected to the upper part of the base. The one-piece cast column has high rigidity and high stability, which can provide stable support for the first and second direct-connected spindle heads, reduce the shaking during the movement of the spindle heads, and significantly improve the machining accuracy. Its stable connection with the base further enhances the overall structural stability of the main unit. It can share the mold with the original standard column of the three-axis vertical machining center, reducing manufacturing costs. The heightened design can increase the Z-axis travel, ensure safe space when changing tools in the spindle, and provide more tool options to meet different machining needs. Customers can choose to increase the column height without changing the travel or increase the column height and travel simultaneously, improving the equipment's expandability and conforming to the modular design concept.

[0019] Compared with the prior art, this utility model provides a five-axis cradle modular vertical machining center, which has the following advantages:

[0020] This five-axis cradle modular vertical machining center combines the main unit and transmission unit into a single structure. It retains the high rigidity and high stability advantages of a three-axis vertical machining center while also possessing the machining performance of a five-axis vertical machining center. It can complete the machining of complex parts in one clamping, reducing clamping errors and facilitating subsequent equipment maintenance, thus reducing maintenance difficulty.

[0021] The main unit's column and the Z-axis drive of the transmission part are matched. The Z-axis drive structure design allows the two to fit well. Users can choose to increase the height of the column while keeping the stroke the same, or increase the height and length of the column and the stroke at the same time, according to actual processing needs, to improve the flexibility of the equipment in different processing scenarios.

[0022] The X-axis, Y-axis, and Z-axis transmissions of the transmission system use common components, and some components can be shared. This reduces the types of equipment parts, lowers the complexity of parts management and assembly, and facilitates subsequent parts replacement and maintenance, reducing maintenance costs and improving the economic efficiency of equipment use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the first direct-drive spindle head and its connection structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the second direct-drive spindle head connection structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the X-axis transmission structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the Y-axis transmission structure of this utility model;

[0028] Figure 6 This is a schematic diagram of the Z-axis transmission structure of this utility model.

[0029] In the diagram: 1. First automatic tool changer assembly; 2. Five-axis cradle; 3. Worktable; 4. Saddle; 5. First direct-drive spindle head; 6. Column; 7. Three-axis drive linear guide; 8. Base; 9. Second automatic tool changer assembly; 10. Second direct-drive spindle head; 11. Locking nut; 12. Bearing housing clamping ring; 13. Screw bearing; 14. Spacer ring; 15. First tail end seat; 16. Guide rod anti-collision ring; 17. Guide rod bearing housing; 18. Coupling; 19. Motor mounting plate; 110. Oil seal; 111. Bearing spacer ring; 112. Second tail end seat; 113. Bearing clamping ring; 114. Transmission box; 115. Transmission seat cover; 116. First ball screw; 117. Second ball screw; 118. Third ball screw. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model provides a technical solution: a five-axis cradle modular vertical machining center, comprising: (See details) Figures 1-6 The main unit and the transmission unit include a first automatic tool changer 1, a second automatic tool changer 9 is added to the inner cavity of the first automatic tool changer 1, and a five-axis cradle 2, a worktable 3 and a saddle 4 are respectively provided in the lower part of the first automatic tool changer 1. A first direct-drive spindle head 5 is added to the outer end of the first automatic tool changer 1, and a column 6 is added to the outside of the first direct-drive spindle head 5. A three-axis transmission linear guide 7 is added to the corresponding position at the lower part of the first direct-drive spindle head 5. A base 8 is added to the lower part of the saddle 4, and a second direct-drive spindle head 10 is added to the outside of the first direct-drive spindle head 5.

[0032] The transmission part includes X-axis transmission, Y-axis transmission and Z-axis transmission. The X-axis transmission includes a locking nut 11, a bearing housing clamping ring 12, a screw bearing 13, a spacer ring 14, a first tail end seat 15, a guide rod anti-collision ring 16, a guide rod bearing housing 17, a coupling 18, a motor fixing plate 19, an oil seal 110, a bearing spacer ring 111 and a first ball screw 116. The first ball screw 116 and the coupling 18 are located on the outer sides of the guide rod bearing housing 17, and the motor fixing plate 19 is located outside the coupling 18.

[0033] The Y-axis drive includes a locking nut 11, a bearing housing clamping ring 12, a screw bearing 13, a spacer ring 14, a guide rod anti-collision ring 16, a guide rod bearing housing 17, a coupling 18, an oil seal 110, a bearing spacer ring 111, a second tail end seat 112, a bearing clamping ring 113, a transmission box 114, a transmission seat cover 115, and a second ball screw 117. The second ball screw 117 is located between the second tail end seat 112 and the bearing clamping ring 113. The transmission box 114 is connected to the outside of the bearing clamping ring 113, and the coupling 18 is located in the inner cavity of the transmission seat cover 115.

[0034] The Z-axis drive includes a locking nut 11, a bearing housing clamping ring 12, a screw bearing 13, a spacer ring 14, a guide rod anti-collision ring 16, a guide rod bearing housing 17, a coupling 18, an oil seal 110, a bearing spacer ring 111, a second tail end seat 112, a bearing clamping ring 113, a transmission box 114, a transmission seat cover 115, and a third ball screw 118. The third ball screw 118 is located between the second tail end seat 112 and the bearing clamping ring 113, and the locking nut 11 is located outside the bearing housing clamping ring 12.

[0035] This machining center combines the advantages of high rigidity, high stability and convenient maintenance of a three-axis vertical machining center, while also possessing the functions of a five-axis vertical machining center. It can complete the machining of complex parts in a single setup, significantly reducing the errors caused by multiple setups and improving machining accuracy and efficiency.

[0036] By integrating the worktable 3 with the rotary table base plate, the need for shims required when adding a five-axis rotary table to a conventional three-axis vertical machining center is eliminated, reducing the additional precision inspection steps for assembly personnel and ensuring the machining accuracy of the machine tool from the assembly stage; moreover, the tilting angle of the worktable 3 driven by the five-axis cradle 2 is more flexible, meeting more complex angle machining needs.

[0037] By adopting a heightened integrated cast column 6, the problem of shortened Z-axis effective travel after adding a five-axis rotary table to a conventional three-axis vertical machining center is effectively solved, ensuring safe space during spindle tool changes, while supporting the selection of more tool specifications and expanding the range of machining applications;

[0038] By changing the width specification of the three-axis drive rail 7 corresponding to the X or Y axis, the load-bearing capacity of the five-axis cradle 2 is significantly improved. Under the same specifications, it can bear more weight than the traditional five-axis vertical machining center, helping customers process larger and heavier parts, and improving the equipment's processing capabilities and application scenarios.

[0039] Adopting a highly modular design, the first automatic tool changer 1 can be directly switched with the second automatic tool changer 9, and the first direct-drive spindle head 5 can be directly switched with the second direct-drive spindle head 10, which can quickly adapt to the processing needs of different customers and reduce the overall cost of equipment replacement.

[0040] The components of the X-axis, Y-axis and Z-axis transmission systems are highly interchangeable, reducing the types of components, simplifying warehouse management and simplifying on-site installation. This also avoids installation errors caused by too many types of components. Customers can also choose to increase the height of column 6 while keeping the stroke the same, or increase the height and length of column 6 and the stroke, depending on their own needs. The equipment is highly expandable and can adapt to changes in customer processing needs over the long term.

[0041] In the X-axis, Y-axis, and Z-axis transmission systems, components such as the screw bearing 13, the first tail end seat 15, and the second tail end seat 112 provide stable support and positioning for the first ball screw 116, the second ball screw 117, and the third ball screw 118. The guide rod anti-collision ring 16 effectively prevents collision damage to moving parts, and the oil seal 110 provides sealing protection for the transmission components, reducing the impact of dust and impurities on the transmission system. This not only ensures the operational stability of the transmission system but also extends the service life of the components, further maintaining the long-term machining accuracy of the machine tool.

[0042] Please see Figure 1 , Figure 2 and Figure 3 A turntable base plate is added to the bottom of the worktable 3, and the turntable base plate and the worktable 3 are synchronously set on the upper part of the saddle 4. The edge of the turntable base plate is adapted to the bottom of the five-axis cradle 2. The saddle 4 drives the turntable base plate synchronously set on its upper part to move, and the turntable base plate drives the worktable 3 synchronously set with it to move. Based on the corresponding adaptation between its bottom and the edge of the turntable base plate, the five-axis cradle 2 moves in coordination with the movement of the turntable base plate and the worktable 3 to realize the angle adjustment and position movement during the processing.

[0043] All couplings 18 are diaphragm type, and one end of each diaphragm type coupling 18 is connected to the motor mounting plate 19 of the X-axis drive and the transmission seat cover 115 of the Y-axis and Z-axis drives, respectively. The motor mounting plate 19 of the X-axis drive drives one end of the diaphragm type coupling 18 connected to it to move, and the diaphragm type coupling 18 transmits the motion to other components of the X-axis drive; the transmission seat covers 115 of the Y-axis and Z-axis drives respectively drive one end of the diaphragm type coupling 18 connected to it to move, and the diaphragm type coupling 18 transmits the motion to other components of the Y-axis and Z-axis drives, respectively, realizing the power transmission of each shaft.

[0044] Please see Figure 4 , Figure 5 and Figure 6The first tailstock 15 in the X-axis drive and the second tailstock 112 in the Y-axis and Z-axis drives each have lubrication channels inside their cavities, which extend axially along the first tailstock 15 and the second tailstock 112, respectively. During X-axis drive, lubricating oil flows along the lubrication channels inside the first tailstock 15 and extending axially thereafter, lubricating the relevant components of the X-axis drive. During Y-axis and Z-axis drive, lubricating oil flows along the lubrication channels inside the second tailstock 112 and extending axially thereafter, lubricating the relevant components of the Y-axis and Z-axis drives, providing continuous lubrication support for each axis drive.

[0045] The screw bearings 13 in the X-axis, Y-axis, and Z-axis drives are all angular contact bearings, and these bearings are tightly fitted with spacers 14 in the X-axis, Y-axis, and Z-axis drives, respectively. The spacers 14 are located inside the angular contact bearings. During the transmission process of their respective axes, the angular contact bearings in the X-axis, Y-axis, and Z-axis drives provide support and positioning for the screws of each axis through their tight fit with the inner spacers 14. The angular contact bearings, in conjunction with the drive components of each axis, drive the screws to rotate, thereby converting the rotational motion into linear motion to drive the machine tool components.

[0046] The column 6 in the main unit is a one-piece cast type, and the inner wall of the one-piece cast column 6 is respectively attached to the outer walls of the first direct-connect spindle head 5 and the second direct-connect spindle head 10. The bottom of the one-piece cast column 6 is connected to the upper part of the base 8. The one-piece cast column 6 is fixed to the base 8 by the connection between its bottom and the upper part of the base 8. The first direct-connect spindle head 5 and the second direct-connect spindle head 10 move under the support of the one-piece cast column 6 through the attachment of their outer walls to the inner walls of the one-piece cast column 6, and cooperate with other components of the main unit to complete the machining action. When it is necessary to adjust the Z-axis travel, the one-piece cast column 6 can be heightened, which will drive the first direct-connect spindle head 5 or the second direct-connect spindle head 10 to adjust its position, ensuring a safe space for spindle tool changing.

[0047] In this scheme: the servo motor on the motor mounting plate 19 drives the first ball screw 116 to rotate through the diaphragm coupling 18. The first ball screw 116 drives the saddle 4 to move linearly along the three-axis transmission rail 7. The saddle 4 drives the worktable 3, the five-axis cradle 2 and the turntable base plate to move synchronously in the X direction.

[0048] The servo motor drives the second ball screw 117 to rotate through the diaphragm coupling 18. The second ball screw 117 drives the saddle 4 to move linearly along the three-axis transmission rail 7. The saddle 4 drives the worktable 3, the five-axis cradle 2 and the turntable base plate to move synchronously in the Y direction.

[0049] The servo motor drives the third ball screw 118 to rotate through the diaphragm coupling 18. The third ball screw 118 drives the first direct-drive spindle head 5 or the second direct-drive spindle head 10 to move linearly along the integral cast column 6. The first direct-drive spindle head 5 or the second direct-drive spindle head 10 drives the first automatic tool changer 1 or the second automatic tool changer 9 to move synchronously in the Z direction.

[0050] The five-axis cradle 2 drives the worktable 3 to tilt, which, in conjunction with the linear motion of the X, Y and Z axes, enables five-axis linkage machining of the workpiece.

[0051] When it is necessary to change the machining tool, the first automatic tool changer 1 or the second automatic tool changer 9 moves to the tool changing position along with the first direct-drive spindle head 5 or the second direct-drive spindle head 10 to complete the tool change.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A five-axis cradle modular vertical machining center, characterized in that, include: The main unit and the transmission unit include a first automatic tool changer assembly (1), a second automatic tool changer assembly (9) is added to the inner cavity of the first automatic tool changer assembly (1), and a five-axis cradle (2), a worktable (3) and a saddle (4) are respectively provided in the lower part of the first automatic tool changer assembly (1), and a first direct-drive spindle head (5) is added to the outer end of the first automatic tool changer assembly (1), and a column (6) is added to the outside of the first direct-drive spindle head (5), and a three-axis transmission rail (7) is added to the corresponding position at the lower part of the first direct-drive spindle head (5), and a base (8) is added to the lower part of the saddle (4), and a second direct-drive spindle head (10) is added to the outside of the first direct-drive spindle head (5); The transmission part includes X-axis transmission, Y-axis transmission and Z-axis transmission. The X-axis transmission includes a locking nut (11), a bearing housing clamping ring (12), a screw bearing (13), a spacer ring (14), a first tail end seat (15), a guide rod anti-collision ring (16), a guide rod bearing housing (17), a coupling (18), a motor fixing plate (19), an oil seal (110), a bearing spacer ring (111) and a first ball screw (116). The first ball screw (116) and the coupling (18) are located on the outer sides of the guide rod bearing housing (17), and the motor fixing plate (19) is located outside the coupling (18). The Y-axis drive includes a locking nut (11), a bearing housing clamping ring (12), a screw bearing (13), a spacer ring (14), a guide rod anti-collision ring (16), a guide rod bearing housing (17), a coupling (18), an oil seal (110), a bearing spacer ring (111), a second tail end seat (112), a bearing clamping ring (113), a transmission box (114), a transmission seat cover (115), and a second ball screw (117), wherein the second ball screw (117) is located between the second tail end seat (112) and the bearing clamping ring (113), the transmission box (114) is connected to the outside of the bearing clamping ring (113), and the coupling (18) is located in the inner cavity of the transmission seat cover (115); Z-axis drive includes a locking nut (11), a bearing housing clamping ring (12), a screw bearing (13), a spacer ring (14), a guide rod anti-collision ring (16), a guide rod bearing housing (17), a coupling (18), an oil seal (110), a bearing spacer ring (111), a second tail end seat (112), a bearing clamping ring (113), a transmission box (114), a transmission seat cover (115), and a third ball screw (118), wherein the third ball screw (118) is located between the second tail end seat (112) and the bearing clamping ring (113), and the locking nut (11) is located outside the bearing housing clamping ring (12).

2. The five-axis cradle modular vertical machining center according to claim 1, characterized in that: A turntable base plate is added to the bottom of the worktable (3), and the turntable base plate and the worktable (3) are synchronously set on the upper part of the saddle (4). The edge of the turntable base plate is adapted to the bottom of the five-axis cradle (2).

3. The five-axis cradle modular vertical machining center according to claim 1, characterized in that: All couplings (18) are diaphragm type, and one end of the diaphragm type coupling (18) is connected to the motor fixing plate (19) of the X-axis drive and the transmission seat cover (115) of the Y-axis drive and Z-axis drive respectively.

4. A five-axis cradle modular vertical machining center according to claim 1, characterized in that: The first tail end seat (15) in the X-axis drive and the second tail end seat (112) in the Y-axis drive and Z-axis drive are all provided with lubricating oil passages, and the lubricating oil passages extend along the axial direction of the first tail end seat (15) and the second tail end seat (112), respectively.

5. A five-axis cradle modular vertical machining center according to claim 1, characterized in that: The screw bearings (13) in the X-axis drive, Y-axis drive and Z-axis drive are all angular contact bearings, and the angular contact bearings are tightly fitted with the spacers (14) in the X-axis drive, Y-axis drive and Z-axis drive respectively. The spacers (14) are located inside the angular contact bearings.

6. A five-axis cradle modular vertical machining center according to claim 1, characterized in that: The column (6) in the main unit is integrally cast, and the inner sidewall of the integrally cast column (6) is respectively attached to the outer sidewall of the first direct-connect spindle head (5) and the second direct-connect spindle head (10). The bottom of the integrally cast column (6) is connected to the upper part of the base (8).

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