Automatic exchange device for side door auxiliary workbenches of vertical three-axis machining center

Abstract

The utility model relates to the technical field of automatic exchange devices, in particular to an automatic exchange device for a side door auxiliary workbench of a vertical three-axis machining center. In order to solve the problems that an existing device for exchanging auxiliary workbenches occupies the area of a front door and causes adverse effects on operation, and meanwhile, the mode of manually exchanging workbenches cannot completely play the role of the device for exchanging workbenches and the working efficiency of operators is not obviously improved, the following technical scheme is provided: the device comprises a vertical machining center, a front door and an automatic side door are arranged on the vertical machining center, a machine tool workbench is arranged in the vertical machining center, a base plate is installed on the machine tool workbench, and an auxiliary workbench used for clamping workpieces is arranged above the base plate. According to the utility model, the function of an exchange workbench device can be fully played, other operations are not influenced when the auxiliary workbench is replaced, and meanwhile, the working efficiency of operators is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic exchange devices, in particular to an automatic exchange device for a side door sub-workbench of a vertical three-axis machining center. Background Art

[0002] Configuring a sub-workbench and its exchange device for a vertical three-axis machining center is beneficial for operators to complete the clamping of workpieces outside the machining area of the machine tool while the machine tool is machining. After the machining of the machine tool is completed, the exchange of the sub-workbench can be completed automatically or by the operator, that is, the loading and unloading actions of the workpiece are completed. Especially for application scenarios with complex workpieces and long clamping times, the work efficiency of operators can be effectively improved, and the utilization rate of the machine tool can be further improved.

[0003] The existing solutions mainly utilize the front door area of the vertical machining center to install a device for exchanging the sub-workbench. However, based on the structural characteristics of the vertical machining center, the front door area of the machine tool is generally used as the main passage for process adjustment, tool adjustment, program adjustment, maintenance and repair. Occupying the front door area will have an adverse impact on the above operations. Moreover, using the manual method to exchange the workbench fails to fully utilize the function of the workbench exchange device, and the work efficiency of operators has not been significantly improved. In view of this, the utility model proposes an automatic exchange device for a side door sub-workbench of a vertical three-axis machining center. Summary of the Utility Model

[0004] The purpose of the utility model is to address the problems in the background art that the existing device for exchanging the sub-workbench occupies the front door area, causing adverse effects on operations. At the same time, the manual method of exchanging the workbench fails to fully utilize the function of the workbench exchange device, and the work efficiency of operators has not been significantly improved. The utility model proposes an automatic exchange device for a side door sub-workbench of a vertical three-axis machining center.

[0005] The technical solution of the utility model: An automatic exchange device for a side door sub-workbench of a vertical three-axis machining center, including a vertical machining center, on which there are a front door and an automatic side door. In the vertical machining center, there is a machine tool workbench, and a backing plate is installed on the machine tool workbench. Above the backing plate, there is a sub-workbench for clamping workpieces. There is also a lifting mechanism arranged at the side door position of the vertical machining center to realize the lifting and replacement of multiple sub-workbenches. The lifting mechanism includes a frame arranged on one side of the vertical machining center; a conveying mechanism installed on the frame for guiding when the sub-workbench moves, and a driving component is arranged on the conveying mechanism to drive the sub-workbench to move and realize the replacement of the sub-workbench in the vertical machining center.

[0006] Optionally, the conveying mechanism includes a slide rail, a slider, a mounting plate, and an oil cylinder. At least two groups of slide rails are fixedly connected to one side of the machine frame close to the vertical machining center. Each group of slide rails is slidably connected with a slider. A mounting plate is fixedly connected to the sides of multiple sliders away from the machine frame. An oil cylinder is also installed on one side of the machine frame close to the vertical machining center. The output end of the oil cylinder is fixedly connected to the mounting plate.

[0007] Optionally, the conveying mechanism further includes a rotating rod, a guiding frame, a first servo motor, a transmission component, and a guiding roller. The rotating rod is rotatably connected to the side of the mounting plate away from the machine frame through a bearing. A guiding frame is fixedly connected to the rotating rod. The guiding frame is in a "U" - shaped structure as a whole. A first servo motor is installed on one side of the machine frame close to the vertical machining center. The output end of the first servo motor is connected to one end of the rotating rod through a transmission component. Two guiding rollers are arranged on the side of the guiding frame close to the machine frame.

[0008] Optionally, the driving component includes a synchronous plate, synchronous wheels, a synchronous belt, a second servo motor, and a pulling block. The synchronous plate is installed on the side of the guiding frame close to the machine frame. Two synchronous wheels are rotatably connected to the side of the synchronous plate away from the guiding frame. A synchronous belt is connected between the two synchronous wheels. The output end of the second servo motor installed on the side of the synchronous plate away from the machine frame penetrates the synchronous plate and is fixedly connected to one of the synchronous wheels. A pulling block is also fixedly arranged on the synchronous belt.

[0009] Optionally, a hanging plate corresponding to the position of the pulling block is installed on one side of the auxiliary workbench. The hanging plate is in a "U" - shaped setting.

[0010] Optionally, the lifting mechanism further includes linear guide rails, a moving plate, a lifting plate, and a first electric conveying roller. At least two groups of vertically - arranged linear guide rails are installed on the machine frame. The moving ends of multiple linear guide rails are fixedly connected to a moving plate. At least two groups of lifting plates are installed on the side of the moving plate away from the linear guide rails. At least two first electric conveying rollers are installed on the top of each lifting plate.

[0011] Optionally, it further includes a locking mechanism arranged on the machine tool workbench to fix the auxiliary workbench and prevent the workpiece from accidentally moving during the machining process. The locking mechanism includes a mounting groove, a two - way oil cylinder, and clamping plates. A mounting groove is opened at the top of the backing plate. A two - way oil cylinder is arranged in the mounting groove. Clamping plates are fixedly connected to both output ends of the two - way oil cylinder.

[0012] Optionally, positioning pins symmetrically arranged on both sides of the mounting groove are installed on the top of the backing plate. Multiple support points fixedly connected to the top of the backing plate are also symmetrically arranged on both sides of the mounting groove.

[0013] Optionally, a plurality of groups of first positioning grooves corresponding to the positions of the positioning pins are formed in the bottom of the auxiliary workbench. Second positioning grooves which are also formed in the bottom of the auxiliary workbench are arranged on both sides of the first positioning grooves. The positions of the second positioning grooves correspond to the positions of the support points. A relief groove corresponding to the installation groove is further formed in the bottom of the auxiliary workbench, and two groups of clamping blocks are symmetrically arranged in the relief groove.

[0014] Compared with the prior art, the utility model has the following beneficial technical effects:

[0015] Through the lifting mechanism, conveying mechanism and driving assembly arranged at the side door position of the vertical machining center, the utility model can automatically complete the automatic exchange and clamping of the auxiliary workbench only by matching with the simple actions of the machine tool during the exchange process of the auxiliary workbench, solves the problem of how to automatically exchange the auxiliary workbench of the vertical machining center, and also avoids the adverse effects of the traditional front door exchange of the auxiliary workbench of the vertical machining center;

[0016] Furthermore, through the arrangement of the locking mechanism, the auxiliary workbench is fixed after the replacement of the auxiliary workbench, so as to ensure the stability during the workpiece machining process. At the same time, the whole device occupies a small area and the beat is adjustable, which is beneficial to effectively utilize the space of the side door of the vertical machining center. Meanwhile, the operator can concentrate the time to continuously load and unload multiple vertical machining centers, which is beneficial to solving the process and time constraints of the operator and improving the work efficiency of the operator;

[0017] To sum up, the utility model can fully play the role of the exchange workbench device, does not affect other operations when replacing the auxiliary workbench, and at the same time, the work efficiency of the operator is significantly improved. Description of the Drawings

[0018] Figure 1 A structural schematic diagram of an automatic exchange device for an auxiliary workbench on the side door of a vertical three-axis machining center is given;

[0019] Figure 2 is a structural schematic diagram of the locking mechanism;

[0020] Figure 3 is a structural schematic diagram of the auxiliary workbench;

[0021] Figure 4 is a structural schematic diagram of the lifting mechanism;

[0022] Figure 5 is a structural schematic diagram of the conveying mechanism;

[0023] Figure 6 is a structural schematic diagram of the guide frame;

[0024] Figure 7 is Figure 4 an enlarged schematic diagram of part A in

[0025] Reference numerals:

[0026] 1. Vertical machining center; 2. Machine tool table; 21. Backing plate; 22. Positioning pin; 23. Support point;

[0027] 3. Sub-table; 31. Hanging plate; 32. First positioning groove; 33. Second positioning groove; 34. Relief groove; 35. Clamping block;

[0028] 4. Locking mechanism; 41. Installation groove; 42. Double-acting cylinder; 43. Clamping plate;

[0029] 5. Lifting mechanism; 51. Frame; 52. Linear guide rail; 53. Moving plate; 54. Lifting plate; 55. First electric conveying roller;

[0030] 6. Conveying mechanism; 61. Slide rail; 62. Slide block; 63. Mounting plate; 64. Cylinder; 65. Rotating rod; 66. Guide frame; 67. First servo motor; 68. Transmission component; 69. Guide roller;

[0031] 7. Driving component; 71. Synchronization plate; 72. Synchronization pulley; 73. Synchronization belt; 74. Second servo motor; 75. Pulling block. Detailed implementation manners

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0033] Generally, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model.

[0034] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] Embodiment

[0038] As Figure 1 and Figure 2 As shown, an automatic exchange device for the side door sub-worktable of a vertical three-axis machining center proposed by the present utility model includes a vertical machining center 1. A front door and an automatic side door are provided on the vertical machining center 1. A machine tool worktable 2 is arranged in the vertical machining center 1. A backing plate 21 is installed on the machine tool worktable 2. A sub-worktable 3 for clamping the workpiece is arranged above the backing plate 21. After the worker clamps the workpiece on the sub-worktable 3, the sub-worktable 3 is fixed to the backing plate 21, and indirectly the workpiece is fixed on the backing plate 21, which is convenient for machining the workpiece.

[0039] Further, please refer to Figure 4, the above-mentioned automatic exchange device further includes a lifting mechanism 5 arranged at the side door position of the vertical machining center 1 to realize the lifting and replacement of two sets of auxiliary worktables 3. The lifting mechanism 5 includes a frame 51 arranged on one side of the vertical machining center 1. The lifting mechanism 5 further includes linear guide rails 52, a moving plate 53, a lifting plate 54, and a first electric conveying roller 55. Two sets of vertically arranged linear guide rails 52 are installed on the frame 51. The moving ends of multiple sets of linear guide rails 52 are fixedly connected to the moving plate 53 together. The moving plate 53 is driven to move up and down by a linear motor. The linear guide rails 52 drive the moving plate 53 to move up and down smoothly, thereby realizing the replacement of the upper and lower two sets of auxiliary worktables 3. Two sets of lifting plates 54 are installed on the side of the moving plate 53 away from the linear guide rails 52. The lifting plates 54 move synchronously with the moving plate 53. Two sets of first electric conveying rollers 55 are installed on the top of each set of lifting plates 54, which are used to move the auxiliary worktable 3 placed thereon after starting.

[0040] Specifically, as Figures 4 - 6 shown, the above-mentioned automatic exchange device includes a conveying mechanism 6 installed on the frame 51 for guiding when the auxiliary worktable 3 moves. The conveying mechanism 6 includes slide rails 61, sliders 62, a mounting plate 63, and an oil cylinder 64. Two sets of slide rails 61 are fixedly connected to the side of the frame 51 close to the vertical machining center 1. Each set of slide rails 61 is slidably connected to a slider 62. The sides of multiple sets of sliders 62 away from the frame 51 are fixedly connected to the mounting plate 63 together. The arrangement of the slide rails 61 and the sliders 62 makes the movement of the mounting plate 63 stable. An oil cylinder 64 is also installed on the side of the frame 51 close to the vertical machining center 1. The output end of the oil cylinder 64 is fixedly connected to the mounting plate 63. After the oil cylinder 64 is started, it drives the mounting plate 63 to move. The conveying mechanism 6 further includes a rotating rod 65, a guiding frame 66, a first servo motor 67, a transmission component 68, and guiding rollers 69. The side of the mounting plate 63 away from the frame 51 is rotatably connected to the rotating rod 65 through a bearing. The rotating rod 65 rotates in place. A guiding frame 66 is fixedly connected to the rotating rod 65. The guiding frame 66 rotates around the rotating rod 65. The guiding frame 66 is integrally in a "U" - shaped structure. A first servo motor 67 is installed on the side of the frame 51 close to the vertical machining center 1. The output end of the first servo motor 67 and one end of the rotating rod 65 are connected with a transmission component 68. After the first servo motor 67 is started, it drives the rotating rod 65 to rotate through the transmission component 68, realizing the flipping of the guiding frame 66, and limiting the position when the auxiliary worktable 3 moves to prevent the moving direction of the auxiliary worktable 3 from deviating. Two sets of guiding rollers 69 are arranged on the side of the guiding frame 66 close to the frame 51, which is convenient for the movement of the auxiliary worktable 3.

[0041] Furthermore, please refer to Figure 6 and Figure 7, the above-mentioned automatic exchange device further includes a driving component 7 provided on the conveying mechanism 6 for driving the auxiliary workbench 3 to move and realizing the replacement of the auxiliary workbench 3 in the vertical machining center 1. The driving component 7 includes a synchronous plate 71, a synchronous pulley 72, a synchronous belt 73, a second servo motor 74, and a pulling block 75. The synchronous plate 71 is installed on one side of the guiding frame 66 close to the machine frame 51, and the synchronous plate 71 rotates synchronously with the guiding frame 66. Two groups of synchronous pulleys 72 are rotatably connected to one side of the synchronous plate 71 away from the guiding frame 66, and a synchronous belt 73 is connected between the two groups of synchronous pulleys 72. The output end of the second servo motor 74 installed on one side of the synchronous plate 71 away from the machine frame 51 penetrates through the synchronous plate 71 and is fixedly connected to one group of synchronous pulleys 72. After the synchronous belt 73 is started, it drives the synchronous pulley 72 to rotate. A pulling block 75 is also fixedly provided on the synchronous belt 73. A hanging plate 31 corresponding to the position of the pulling block 75 is installed on one side of the auxiliary workbench 3. The hanging plate 31 is arranged in a "U" shape, which is convenient for the pulling block 75 to be stuck in the hanging plate 31 after moving. The pulling block 75 moves synchronously with the synchronous belt 73. After the pulling block 75 moves to the position of the hanging plate 31, it drives the auxiliary workbench 3 to move.

[0042] As Figure 2 shown, the above-mentioned automatic exchange device further includes a locking mechanism 4 provided on the machine tool workbench 2 for fixing the auxiliary workbench 3 to prevent the workpiece from accidentally moving during the machining process. The locking mechanism 4 includes an installation groove 41, a double-acting oil cylinder 42, and clamping plates 43. An installation groove 41 is opened at the top of the backing plate 21. A double-acting oil cylinder 42 is arranged in the installation groove 41. Both output ends of the double-acting oil cylinder 42 are fixedly connected with clamping plates 43. After the double-acting oil cylinder 42 is started, it drives the two groups of clamping plates 43 to move synchronously.

[0043] Finally, please refer to Figure 2 and Figure 3 , positioning pins 22 symmetrically arranged on both sides of the installation groove 41 are installed on the top of the backing plate 21 in the above-mentioned automatic exchange device. A plurality of support points 23 fixedly connected to the top of the backing plate 21 are also symmetrically arranged on both sides of the installation groove 41. A plurality of first positioning grooves 32 corresponding to the positions of the positioning pins 22 are opened at the bottom of the auxiliary workbench 3. Second positioning grooves 33 are also arranged on both sides of the first positioning grooves 32 and are also opened at the bottom of the auxiliary workbench 3, which is convenient for limiting the position of the auxiliary workbench 3 after it is placed on the backing plate 21. The positions of the second positioning grooves 33 correspond to the positions of the support points 23. A relief groove 34 corresponding to the installation groove 41 is also opened at the bottom of the auxiliary workbench 3. Two groups of clamping blocks 35 are symmetrically arranged in the relief groove 34 for the clamping plates 43 to hook the clamping blocks 35 after moving, so that the auxiliary workbench 3 is fixed on the top of the backing plate 21.

[0044] In this embodiment, the auxiliary workbench 3 with the workpiece clamped is placed above the first electric conveying roller 55 of the lower set of lifting plates 54. After the workpiece is processed on the auxiliary workbench 3 in the vertical machining center 1, the first servo motor 67 is started. The first servo motor 67 drives the rotating rod 65 to rotate through the transmission component 68, so that the guide frame 66 rotates around the rotating rod 65. At this time, the guide frame 66 turns over and becomes in a horizontal state. The oil cylinder 64 moves downward, causing the mounting plate 63 to move downward, that is, the guide frame 66 moves downward until the position of the pulling block 75 is lower than the position of the hanging plate 31. At this time, the hanging plate 31 is located above the pulling block 75. The oil cylinder 64 is started to extend to drive the mounting plate 63 to move upward. At this time, the pulling block 75 cooperates with the hanging plate 31. Then the second servo motor 74 is started to drive the synchronous belt 73 to rotate, so that the pulling block 75 moves and drives the hanging plate 31 to move. At this time, the auxiliary workbench 3 moves above the two sets of guide rollers 69 and moves smoothly under the limiting action of the guide frame 66 until it moves above the first electric conveying roller 55. After the first electric conveying roller 55 is started, the auxiliary workbench 3 moves to the middle position above the lifting plate 54. At this time, the linear motor is started. Under the limiting action of the two sets of linear guide rails 52, the lower set of auxiliary workbenches 3 is driven upward to complete the replacement of the two sets of auxiliary workbenches 3. At this time, the lower set of first electric conveying rollers 55 is started to drive the new auxiliary workbench 3 to move onto the guide frame 66, and the pulling block 75 continues to drive the auxiliary workbench 3 to move above the cushion plate 21. After the guide frame 66 descends, the new auxiliary workbench 3 is accurately placed by the setting positions of the positioning pin 22 and the support point 23. Finally, the bidirectional oil cylinder 42 is started to drive the two sets of clamping plates 43 to approach and squeeze the clamping block 35, so that the auxiliary workbench 3 is firmly fixed above the cushion plate 21, facilitating the processing of the workpiece.

[0045] The above specific embodiment is only an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant revelations of the above embodiment, those skilled in the art can make various alternative improvements and combinations to the above specific embodiment.

Claims

1. An automatic exchange device for the side door auxiliary workbench of a vertical three-axis machining center, comprising a vertical machining center (1), a front door and an automatic side door are arranged on the vertical machining center (1), a machine tool workbench (2) is arranged in the vertical machining center (1), a backing plate (21) is installed on the machine tool workbench (2), and an auxiliary workbench (3) for clamping a workpiece is arranged above the backing plate (21), characterized in that, It further includes: A lifting mechanism (5) arranged at the side door position of the vertical machining center (1) to realize the lifting and replacement of multiple sets of the auxiliary workbenches (3). The lifting mechanism (5) includes a frame (51) arranged on one side of the vertical machining center (1); A conveying mechanism (6) installed on the frame (51) for guiding when the auxiliary workbench (3) moves. A driving component (7) for driving the movement and replacement of the auxiliary workbench (3) is arranged on the conveying mechanism (6).

2. The automatic exchange device for the side door sub-workbench of a vertical three-axis machining center according to claim 1, characterized in that, The conveying mechanism (6) includes a slide rail (61), a slider (62), a mounting plate (63), and an oil cylinder (64). At least two groups of slide rails (61) are fixedly connected to the side of the frame (51) close to the vertical machining center (1). Each group of the slide rails (61) is slidably connected with a slider (62). The sides of multiple groups of the sliders (62) away from the frame (51) are commonly fixedly connected with a mounting plate (63). An oil cylinder (64) is also installed on the side of the frame (51) close to the vertical machining center (1). The output end of the oil cylinder (64) is fixedly connected with the mounting plate (63).

3. An automatic exchange device for the side door sub-workbench of a vertical three-axis machining center according to claim 2, characterized in that, The conveying mechanism (6) further includes a rotating rod (65), a guiding frame (66), a first servo motor (67), a transmission component (68), and a guiding roller (69). The side of the mounting plate (63) away from the frame (51) is rotatably connected with a rotating rod (65) through a bearing. A guiding frame (66) is fixedly connected to the rotating rod (65). The guiding frame (66) is integrally in a "U" - shaped structure. A first servo motor (67) is installed on the side of the frame (51) close to the vertical machining center (1). The output end of the first servo motor (67) and one end of the rotating rod (65) are connected with a transmission component (68). Two guiding rollers (69) are arranged on the side of the guiding frame (66) close to the frame (51).

4. An automatic exchange device for the side door sub-workbench of a vertical three-axis machining center according to claim 3, characterized in that, The driving component (7) includes a synchronous plate (71), synchronous wheels (72), a synchronous belt (73), a second servo motor (74), and a pulling block (75). The synchronous plate (71) is installed on the side of the guiding frame (66) close to the frame (51). Two synchronous wheels (72) are rotatably connected to the side of the synchronous plate (71) away from the guiding frame (66). A synchronous belt (73) is connected between the two synchronous wheels (72). The output end of the second servo motor (74) installed on the side of the synchronous plate (71) away from the frame (51) penetrates through the synchronous plate (71) and is fixedly connected with one of the synchronous wheels (72). A pulling block (75) is also fixedly arranged on the synchronous belt (73).

5. An automatic exchange device for the side door auxiliary workbench of a vertical three-axis machining center according to claim 4, characterized in that, A hanging plate (31) corresponding to the position of the pulling block (75) is installed on one side of the auxiliary workbench (3). The hanging plate (31) is arranged in a "U" - shaped manner.

6. The automatic exchange device for the side door auxiliary workbench of a vertical three-axis machining center according to claim 1, wherein, The lifting mechanism (5) further includes linear guide rails (52), a moving plate (53), a lifting plate (54), and a first electric conveying roller (55). At least two sets of vertically arranged linear guide rails (52) are installed on the frame (51). The moving ends of the multiple sets of linear guide rails (52) are fixedly connected to the moving plate (53) together. At least two sets of lifting plates (54) are installed on one side of the moving plate (53) away from the linear guide rails (52). At least two sets of first electric conveying rollers (55) are installed on the top of each set of lifting plates (54).

7. An automatic exchange device for the side door sub-workbench of a vertical three-axis machining center according to claim 1, characterized in that, It further includes a locking mechanism (4) arranged on the machine tool workbench (2) to fix the sub-workbench (3) to prevent accidental movement of the workpiece during the machining process. The locking mechanism (4) includes an installation groove (41), a two-way oil cylinder (42), and a clamping plate (43). An installation groove (41) is opened at the top of the backing plate (21). A two-way oil cylinder (42) is arranged in the installation groove (41). Both output ends of the two-way oil cylinder (42) are fixedly connected to the clamping plate (43).

8. An automatic exchange device for the side door sub-workbench of a vertical three-axis machining center according to claim 7, characterized in that, Positioning pins (22) symmetrically arranged on both sides of the installation groove (41) are installed at the top of the backing plate (21). Multiple sets of support points (23) fixedly connected to the top of the backing plate (21) are also symmetrically arranged on both sides of the installation groove (41).

9. An automatic exchange device for the side door auxiliary workbench of a vertical three-axis machining center according to claim 8, characterized in that, Multiple sets of first positioning grooves (32) corresponding to the positions of the positioning pins (22) are opened at the bottom of the sub-workbench (3). Second positioning grooves (33) also opened at the bottom of the sub-workbench (3) are arranged on both sides of the first positioning grooves (32). The positions of the second positioning grooves (33) correspond to the positions of the support points (23). A relief groove (34) corresponding to the installation groove (41) is also opened at the bottom of the sub-workbench (3). Two sets of clamping blocks (35) are symmetrically arranged in the relief groove (34).

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