Multi-spindle machining center structure

Abstract

This invention belongs to the field of CNC machine tool technology, and particularly relates to a multi-spindle machining center structure, including a machine base, a column, and a worktable assembly. The worktable assembly includes a movable seat and a worktable plate. A first guide rail is provided on the machine base. The movable seats include three sets, sequentially arranged on the first guide rail. Each movable seat has a through groove. A first protective cover is provided at the first end of the machine base, and a second protective cover is provided at the second end. The first protective cover slides into the through groove of the movable seat adjacent to it, and one end of the second protective cover slides into the through groove of the movable seat adjacent to it. A third protective cover is provided between two adjacent movable seats. One end of the third protective cover is fixedly connected to one of the movable seats, and the other end slides into the through groove. A fourth protective cover is provided between two adjacent movable seats. One end of the fourth protective cover is fixedly connected to one of the movable seats, and the other end slides into the corresponding through groove. The first, second, and third movable seats are connected to a drive mechanism. Each of the first, second, and third movable seats has a worktable plate.

Description

Technical Field

[0001] This invention belongs to the field of CNC machine tool technology, and particularly relates to a multi-spindle machining center structure. Background Technology

[0002] Machining centers are common machining equipment; they also come in various structures, such as horizontal machining centers, vertical machining centers, and vertical-horizontal composite machining centers. Furthermore, to meet practical machining needs and improve efficiency, two or more spindles are typically used. To match the machining operations of each spindle, a corresponding number of worktables are required.

[0003] For example, Chinese invention patent document CN220659911U discloses a multi-table machining center, including a base, a column, and worktables. The column is located on one side of the base and has at least two cutting spindles. The number of worktables is the same as the number of cutting spindles, and they are arranged sequentially along the distribution direction of the cutting spindles. The worktables include a mounting base, a movable base, a first drive mechanism, a second drive mechanism, and a baffle. The mounting base is located on the base, and the first drive mechanism is connected to the mounting base to drive the mounting base to move back and forth. The movable base is slidably connected to the mounting base, and the second drive mechanism is connected to the movable base to drive the movable base to move left and right. The movable base has through slots that pass through the left and right sides, and the baffle slides through the through slots and covers the second drive mechanism. The two ends of the baffle are fixedly connected to the base or the mounting base. The base has a first guide rail, and two adjacent first guide rails form a set of support guide rails. A mounting seat is mounted on the support guide rails. A first drive mechanism is located on the bottom side of the mounting seat and connected to it. The mounting seat has two second guide rails, and a movable seat is mounted on the second guide rails. A second drive mechanism is located on the mounting seat and connected to the bottom side of the movable seat. The top surface of the movable seat forms a worktable. Both ends of the baffle are fixedly connected to both ends of the mounting seat. The movable seat has downward-extending extensions on its front and rear sides, located on both sides of the mounting seat. The through groove has extension grooves extending to the lower ends of the extensions, with the lower ends of the extension grooves lower than the top surface of the second guide rails. The baffle has downward-bent bends on both sides, extending to the bottom ends of the extension grooves. Side plates are located at both ends of the baffle, located at the ends of the mounting seat. The baffle and the two side plates, together with the mounting seat, form a protective space. The second guide rail and the second drive mechanism are located within this protective space. Each set of worktables has a through slot on its movable seat, and a baffle slides through the through slot. Therefore, when the movable seat moves, the baffle can always protect the second drive mechanism and prevent debris from entering the second drive mechanism. Since the baffle passes through the movable seat, the movable seat can move to the end of the baffle, so adjacent worktables can be set close together. With a fixed stroke of the worktable, the overall length of the base can be reduced, thereby reducing the overall size of the base and reducing costs.

[0004] Because the workbenches are independent of each other, each workbench can only be equipped with an independent baffle structure, which is relatively complex. Furthermore, the gap between the two sets of baffles is small, which can cause debris to fall into the gap formed by the side plates of the two baffles, making it difficult to clean and causing jamming. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-spindle machining center structure, which aims to solve the problems of existing technologies where multiple independent worktables need to be equipped with independent protective baffles, resulting in complex structures, difficulty in cleaning debris, and baffles that can cause debris to get stuck.

[0006] To achieve the above objectives, this invention provides a multi-spindle machining center structure, including a base, a column, and a worktable assembly; the column is located at the rear of the base, and three sets of lifting mechanisms are provided at the front of the column, each lifting mechanism is provided with a spindle seat, and the spindle seat is provided with a spindle; The workbench assembly includes a movable base and a workbench plate; a first guide rail is provided on the base, and the base has a first end and a second end distributed at both ends; the movable base includes a first movable base, a second movable base, and a third movable base slidably disposed on the first guide rail; the first movable base is provided with a first through groove, and the second movable base is provided with a second through groove; a first protective cover is provided at the first end of the base, and a second protective cover is provided at the second end, the first protective cover slidingly extending into the first through groove, and one end of the second protective cover slidingly extending into the second through groove; A third protective cover is provided between the first movable seat and the third movable seat; one end of the third protective cover is fixedly connected to the third movable seat, and the other end slides into the first through groove, or one end of the third protective cover is fixedly connected to the first movable seat, and the other end slides into the third through groove of the third movable seat. A fourth protective cover is provided between the second movable seat and the third movable seat; one end of the fourth protective cover is fixedly connected to the third movable seat, and the other end slides into the second through groove, or one end of the fourth protective cover is fixedly connected to the second movable seat, and the other end slides into the third through groove of the third movable seat; The first movable seat, the second movable seat, and the third movable seat are connected to a driving mechanism, which is used to drive the first movable seat, the second movable seat, and the third movable seat to move synchronously or asynchronously. The first movable seat, the second movable seat, and the third movable seat are all equipped with the worktable.

[0007] Furthermore, the driving mechanism includes a first driving mechanism, a second driving mechanism, and a third driving mechanism. The first driving mechanism is connected to the first movable seat, the second driving mechanism is connected to the second movable seat, and the third driving mechanism is connected to the third movable seat.

[0008] Furthermore, the third protective cover and the fourth protective cover are an integral structure, and the whole formed by the third protective cover and the fourth protective cover passes through the third through groove, with both ends extending into the first through groove and the second through groove respectively.

[0009] Furthermore, baffles are provided on both sides of the third movable seat, and the two baffles are respectively connected to the third protective cover and the fourth protective cover.

[0010] Furthermore, one end of the first protective cover overlaps the third protective cover, and the second protective cover overlaps the fourth protective cover.

[0011] Furthermore, the length of the first protective cover extending into the first through slot is not greater than the travel of the first movable seat, and the length of the second protective cover extending into the second through slot is not greater than the travel of the second movable seat.

[0012] Furthermore, the first movable seat includes a first base and a first mounting seat, the first base is disposed on the first guide rail, the first mounting seat is disposed on the first base, and the first through groove is formed between the first mounting seat and the first base; The second movable seat includes a second base and a second mounting seat. The second base is disposed on the first guide rail, and the second mounting seat is disposed on the second base. A second through groove is formed between the second mounting seat and the second base. The third movable seat includes a third base and a third mounting seat. The third base is disposed on the first guide rail, and the third mounting seat is disposed on the third base. The third through groove is formed between the third mounting seat and the third base.

[0013] Furthermore, the first through groove includes two first inclined grooves, which are connected to form a top end, and the bottom ends of the two first inclined grooves extend downward to form a first vertical groove; the first protective cover and the third protective cover are supported on both sides at the bottom of the first vertical groove. The second through groove includes two second inclined grooves, which are connected to form a top end, and the bottom ends of the two second inclined grooves extend downward to form a second vertical groove; the second protective cover and the fourth protective cover are supported on both sides at the bottom of the second vertical groove.

[0014] Furthermore, the first movable seat is provided with a first baffle on both sides, and the second movable seat is provided with a second baffle on both sides; the bottom side of the first baffle is provided with a first scraper, and the bottom side of the second baffle is provided with a second scraper.

[0015] Furthermore, each of the worktables is provided with a second guide rail and a fourth drive mechanism at its bottom. The second guide rail is connected to the corresponding first movable seat, second movable seat or third movable seat. Each of the worktables is also provided with a fourth through groove, and a fifth protective cover is slidably inserted in the fourth through groove. The two ends of the fifth protective cover are respectively connected to the two ends of the corresponding first movable seat, second movable seat or third movable seat.

[0016] The above-described technical solutions in the multi-spindle machining center structure provided by the embodiments of the present invention have at least the following technical effects: 1. This multi-spindle machining center features a unique structure where a first, second, third, and fourth protective cover form a unified protective structure. This allows for the installation of three sets of worktables, resulting in a more compact worktable design. Furthermore, the absence of gaps between the first, second, and third moving seats, eliminating the problem of chips getting stuck in the protective covers and facilitating chip removal.

[0017] 2. The first moving seat, the second moving seat, and the third moving seat can move independently or synchronously. Therefore, the worktables set on the first moving seat, the second moving seat, and the third moving seat can be set to process the same parts synchronously or to process different parts simultaneously.

[0018] 3. The presence of three sets of main shaft structures on the same column makes the column structure more compact and increases the length of the column, thereby increasing the strength and stability of the column. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A structural diagram of a multi-spindle machining center is provided for embodiments of the present invention.

[0021] Figure 2 This is a structural diagram of the worktable assembly of a multi-spindle machining center provided in an embodiment of the present invention.

[0022] Figure 3This is a cross-sectional view of the worktable assembly of a multi-spindle machining center structure provided in an embodiment of the present invention.

[0023] Figure 4 A structural diagram of a hidden protective cover for a worktable assembly in a multi-spindle machining center structure is provided for embodiments of the present invention.

[0024] Figure 5 A structural diagram of a protective cover for a multi-spindle machining center structure is provided for embodiments of the present invention. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0029] In one embodiment of the multi-spindle machining center structure of the present invention, please refer to... Figure 1This multi-spindle machining center has a three-column spindle structure. Specifically, the multi-spindle machining center structure includes a base 100, a column 10, and a worktable assembly 30. The column 10 is located at the rear of the base 100, and three sets of lifting mechanisms 40 are arranged at the front of the column 10. Each lifting mechanism 40 is equipped with a spindle seat 50, and the spindle seat 50 is equipped with a spindle 60. The lifting mechanism 40 drives the corresponding connected spindle seat 50 to rise and fall, so that the cutting tool on the spindle 60 can cut and machine the workpiece on the worktable assembly 30. Specifically, the lifting mechanism 40 is a servo electric lead screw module.

[0030] Furthermore, refer to Figure 1 The top side of the column 10 is also equipped with three sets of tool magazine mounting seats 11, each tool magazine 70. The tool magazine 70 is located in front of the corresponding spindle seat 50, thus enabling tool changing on the spindle 60.

[0031] Furthermore, the central tool magazine 70 is positioned vertically at 0°, while the tool magazines 70 on either side are inclined relative to the central tool magazine 70. This reduces the space occupied by the three sets of tool magazines 70, making the overall design more compact. Specifically, the central tool magazine 70 is located on the front side of its corresponding tool magazine mounting base 11; the tool magazine mounting bases 11 on either side have inclined mounting positions, and the tool magazines 70 are mounted on these inclined positions. Even further, the spindle seats 50 on both sides have inclined surfaces to avoid obstructing the tool magazines.

[0032] Reference Figures 1 to 5 The workbench assembly 30 includes a movable base and a workbench plate 200. A first guide rail 110 is provided on the base 100, which has a first end 101 and a second end 102 distributed at both ends. The movable base includes a first movable base 300, a second movable base 400, and a third movable base 500 slidably disposed on the first guide rail 110. The first movable base 300 has a first through groove 301, and the second movable base 400 has a second through groove 401. A first protective cover 600 is provided at the first end of the base 100, and a second protective cover 700 is provided at the second end. The first protective cover 600 slidably extends into the first through groove 301, and one end of the second protective cover 700 slidably extends into the second through groove 401.

[0033] Please refer to Figures 2 to 5 A third protective cover 800 is provided between the first movable seat 300 and the third movable seat 500; one end of the third protective cover 800 is fixedly connected to the third movable seat 500, and the other end slides into the first through groove 401, or one end of the third protective cover 800 is fixedly connected to the first movable seat 300, the third movable seat 500 is provided with a third through groove 501, and the other end of the third protective cover 800 slides into the third through groove 501.

[0034] Please refer to Figures 2 to 5A fourth protective cover 810 is provided between the second movable seat 400 and the third movable seat 500. One end of the fourth protective cover 810 is fixedly connected to the third movable seat 500, and the other end slides into the second through groove 401. Alternatively, one end of the fourth protective cover 810 is fixedly connected to the second movable seat 400, and the other end slides into the third through groove 501 of the third movable seat 500. This allows the first protective cover 600, the second protective cover 700, the third protective cover 800, and the fourth protective cover 810 to form a complete protective cover assembly structure that is enclosed on the top of the base 100. Preferably, the third protective cover 800 and the fourth protective cover 810 are an integral sheet metal cover structure. The integral sheet metal cover passes through the third through groove 501, and its middle part is fixedly connected to the third movable seat 500. The two ends extending out of the third through groove 501 form the third protective cover 800 and the fourth protective cover 810. More preferably, one end of the first protective cover 600 is always attached to the third protective cover 800. Even when the third movable seat 500 moves to the limit of its travel, the first protective cover 600 remains attached to the third protective cover 800, so that the third protective cover 800 can support the first protective cover 600. Furthermore, one end of the second protective cover 700 is always attached to the fourth protective cover 810. Even when the third movable seat 500 moves to the limit of its travel, the second protective cover 700 remains attached to the fourth protective cover 810, so that the fourth protective cover 810 can support the second protective cover 700.

[0035] Please refer to Figures 2 to 5 The first movable seat 300, the second movable seat 400, and the third movable seat 500 are connected to a drive mechanism (not shown in the attached diagram). The drive mechanism is used to drive the first movable seat 300, the second movable seat 400, and the third movable seat 500 to move synchronously or asynchronously. Each of the first movable seat 300, the second movable seat 400, and the third movable seat 500 is provided with a worktable 200. The worktable 200 is connected to a second guide rail 220 and a fourth drive mechanism (not shown in the attached diagram). The fourth drive mechanism drives the worktable 200 to translate along the second guide rail 220, and the direction of translation is perpendicular to the direction of movement of the movable seats. To achieve independent movement of the first movable seat 300, the second movable seat 400, and the third movable seat 500, the drive mechanism includes a first drive mechanism, a second drive mechanism, and a third drive mechanism. The first drive mechanism is connected to the first movable seat 300, the second drive mechanism is connected to the second movable seat 400, and the third drive mechanism is connected to the third movable seat 500. In this embodiment, the first drive mechanism, the second drive mechanism, the third drive mechanism, and the fourth drive mechanism are all electric lead screw mechanisms.

[0036] In this embodiment, the multi-spindle machining center utilizes a unified protective structure formed by a first protective cover 600, a second protective cover 700, a third protective cover 800, and a fourth protective cover 810. This allows for the installation of three sets of worktable structures, resulting in a more compact overall worktable structure. Furthermore, the absence of gaps between the first moving base 300, the second moving base 400, and the third moving base 500 eliminates the problem of chips jamming the protective covers, facilitating chip removal and cleaning. Additionally, the first moving base 300, the second moving base 400, and the third moving base 500 can move independently or synchronously. Therefore, the worktables on these three units can be used to process the same parts simultaneously or different parts concurrently. Moreover, the presence of three sets of spindle structures on the same column 10 makes the column 10 structure more compact, and the increased length of the column 10 enhances its strength and stability.

[0037] Furthermore, refer to Figure 2 and Figure 3 The third movable seat 500 has baffles 510 on both sides, and the two baffles 510 are respectively connected to the third protective cover 800 and the fourth protective cover 810. Specifically, the bottom edge of the baffle 510 has a connecting plate 511 extending outward. The locking screw passes through the connecting plate 511 and connects to the corresponding third protective cover 800 and fourth protective cover 810.

[0038] Furthermore, the length of the first protective cover 600 extending into the first through groove 301 is no greater than the travel of the first movable seat 300, and the length of the second protective cover 400 extending into the second through groove 401 is no greater than the travel of the second movable seat 400. In this embodiment, when the first movable seat 300 moves to the first end 101, the end of the first protective cover 600 is prevented from extending out of the first through groove 301; and when the second movable seat 400 moves to the second end 102, the end of the second protective cover 400 is prevented from extending out of the second through groove 401.

[0039] Furthermore, refer to Figure 4 The first movable seat 300 includes a first base 310 and a first mounting seat 320. The first base 310 is disposed on the first guide rail 110, and the first mounting seat 320 is disposed on the first base 310. A first through groove 301 is formed between the first mounting seat 320 and the first base 310.

[0040] The second movable seat 400 includes a second base 410 and a second mounting seat 420. The second base 410 is disposed on the first guide rail 110, and the second mounting seat 420 is disposed on the second base 410. A second through groove 401 is formed between the second mounting seat 410 and the second base 410.

[0041] The third movable seat 500 includes a third base 520 and a third mounting seat 530. The third base 520 is disposed on the first guide rail 110, and the third mounting seat 530 is disposed on the third base 520. A third through groove 501 is formed between the third mounting seat 530 and the third base 520.

[0042] In this embodiment, when assembling the protective cover and the movable base, the first base 310, the second base 410 and the third base 520 can be installed on the first guide rail 110 to complete the installation of the first protective cover 600, the second protective cover 700, the third protective cover 800 and the fourth protective cover 810 respectively, and then the first mounting base 310 and the second mounting base 410 can be installed, making the overall assembly more convenient.

[0043] Furthermore, refer to Figure 4 The first through groove 301 includes two first inclined grooves 302, which are connected to form a top. Specifically, the two first inclined grooves 302 form a ridge-shaped structure. The bottom ends of the two first inclined grooves 302 extend downward to form a first vertical groove 303; the sides of the first protective cover 600 and the third protective cover 800 are supported at the bottom of the first vertical groove 303.

[0044] The second through groove 401 includes two second inclined grooves 402, which are connected to form a top end, and the bottom ends of the two second inclined grooves 402 extend downward to form a second vertical groove 403; the sides of the second protective cover 700 and the fourth protective cover 810 are supported at the bottom of the second vertical groove 403.

[0045] Furthermore, refer to Figure 2 and Figure 3The first movable seat 300 has first baffles 330 on both sides, and the second movable seat 400 has second baffles 430 on both sides. The bottom side of the first baffle 330 has a first scraper (not shown in the attached drawing), and the bottom side of the second baffle 430 has a second scraper (not shown in the attached drawing). Specifically, a first mounting plate 331 extends outward from the bottom edge of the first baffle 330, and the first scraper is located on the bottom side of the first mounting plate 331. The first scraper located on the top side of the first protective cover 600 is in contact with the top sidewall of the first protective cover 600. The first scraper located on the top side of the third protective cover 800 is in contact with the top sidewall of the third protective cover 800. The bottom edge of the second baffle 430 extends outward from the second mounting plate 431; the second scraper is located on the bottom side of the second mounting plate 431. The second scraper located on the top side of the second protective cover 600 is in contact with the second protective cover 600. The second scraper located on the top side of the fourth protective cover 810 is in contact with the outer surface of the top side of the fourth protective cover 810. In this embodiment, when the first movable seat 300, the second movable seat 400 and the third movable seat 500 move, the first scraper and the second scraper can be used to scrape off the debris on the top side of the first protective cover 600, the second protective cover 700, the third protective cover 800 and the fourth protective cover 810.

[0046] Furthermore, each workbench 200 is also provided with a fourth through groove 201, and a fifth protective cover 210 is slidably inserted in the fourth through groove 201. The two ends of the fifth protective cover 210 are respectively connected to the two ends of the corresponding movable seat.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-spindle machining center structure, characterized in that, It includes a base, a column, and a worktable assembly; the column is located at the rear of the base, and three sets of lifting mechanisms are provided at the front of the column, each of the lifting mechanisms is provided with a spindle seat, and the spindle seat is provided with a spindle; The workbench assembly includes a movable base and a workbench plate; a first guide rail is provided on the base, and the base has a first end and a second end distributed at both ends; the movable base includes a first movable base, a second movable base, and a third movable base slidably disposed on the first guide rail; the first movable base is provided with a first through groove, and the second movable base is provided with a second through groove; a first protective cover is provided at the first end of the base, and a second protective cover is provided at the second end, the first protective cover slidingly extending into the first through groove, and one end of the second protective cover slidingly extending into the second through groove; A third protective cover is provided between the first movable seat and the third movable seat; one end of the third protective cover is fixedly connected to the third movable seat, and the other end slides into the first through groove, or one end of the third protective cover is fixedly connected to the first movable seat, and the other end slides into the third through groove of the third movable seat. A fourth protective cover is provided between the second movable seat and the third movable seat; one end of the fourth protective cover is fixedly connected to the third movable seat, and the other end slides into the second through groove, or one end of the fourth protective cover is fixedly connected to the second movable seat, and the other end slides into the third through groove of the third movable seat; The first movable seat, the second movable seat, and the third movable seat are connected to a driving mechanism, which is used to drive the first movable seat, the second movable seat, and the third movable seat to move synchronously or asynchronously. The first movable seat, the second movable seat, and the third movable seat are all equipped with the worktable.

2. The multi-spindle machining center structure according to claim 1, characterized in that: The driving mechanism includes a first driving mechanism, a second driving mechanism, and a third driving mechanism. The first driving mechanism is connected to the first movable seat, the second driving mechanism is connected to the second movable seat, and the third driving mechanism is connected to the third movable seat.

3. The multi-spindle machining center structure according to claim 1, characterized in that: The third protective cover and the fourth protective cover are an integral structure. The whole formed by the third protective cover and the fourth protective cover passes through the third through groove, and both ends extend into the first through groove and the second through groove, respectively.

4. The multi-spindle machining center structure according to claim 3, characterized in that: The third movable seat is provided with baffles on both sides, and the two baffles are respectively connected to the third protective cover and the fourth protective cover.

5. The multi-spindle machining center structure according to any one of claims 1 to 4, characterized in that: One end of the first protective cover overlaps the third protective cover, and the second protective cover overlaps the fourth protective cover.

6. In the multi-spindle machining center structure according to claim 5, the length of the first protective cover extending into the first through slot is not greater than the travel of the first movable seat, and the length of the second protective cover extending into the second through slot is not greater than the travel of the second movable seat.

7. The multi-spindle machining center structure according to any one of claims 1 to 4, characterized in that: The first movable seat includes a first base and a first mounting seat. The first base is disposed on the first guide rail, and the first mounting seat is disposed on the first base. The first through groove is formed between the first mounting seat and the first base. The second movable seat includes a second base and a second mounting seat. The second base is disposed on the first guide rail, and the second mounting seat is disposed on the second base. A second through groove is formed between the second mounting seat and the second base. The third movable seat includes a third base and a third mounting seat. The third base is disposed on the first guide rail, and the third mounting seat is disposed on the third base. The third through groove is formed between the third mounting seat and the third base.

8. The multi-spindle machining center structure according to claim 1, characterized in that: The first through groove includes two first inclined grooves, which are connected to form a top end, and the bottom ends of the two first inclined grooves extend downward to form a first vertical groove; the first protective cover and the third protective cover are supported on both sides at the bottom of the first vertical groove. The second through groove includes two second inclined grooves, which are connected to form a top end, and the bottom ends of the two second inclined grooves extend downward to form a second vertical groove; the second protective cover and the fourth protective cover are supported on both sides at the bottom of the second vertical groove.

9. The multi-spindle machining center structure according to claim 1, characterized in that: The first movable seat is provided with a first baffle on both sides, and the second movable seat is provided with a second baffle on both sides; the bottom side of the first baffle is provided with a first scraper, and the bottom side of the second baffle is provided with a second scraper.

10. The multi-spindle machining center structure according to claim 8, characterized in that: Each of the worktables is provided with a second guide rail and a fourth drive mechanism at its bottom. The second guide rail is connected to the corresponding first movable seat, second movable seat or third movable seat. Each of the worktables is also provided with a fourth through groove. A fifth protective cover is slidably inserted in the fourth through groove. The two ends of the fifth protective cover are respectively connected to the two ends of the corresponding first movable seat, second movable seat or third movable seat.

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