Double-spindle and pallet-changing machining center

Abstract

The present invention discloses a machining center with a double-spindle exchange worktable, which includes a machine table, a three-axis motion device, one or two first rotating mechanisms, one or two spindles, a transposition device and two worktables. One end of the machine table is set as a machining station, and the other end is set as a loading and unloading station; the three-axis motion device includes one or two X-axis motion mechanisms, one or two Y-axis motion mechanisms and one or two Z-axis motion mechanisms; the first rotating mechanism is arranged on the Y-axis motion mechanism; the spindles are respectively arranged on the first rotating mechanisms in one-to-one correspondence and are located at the machining station, and the first rotating mechanism is used to drive the corresponding spindle to rotate; the transposition device is arranged on the machine table; the two worktables are placed on the transposition device, and one of the worktables is located at the machining station and the other worktable is located at the loading and unloading station. The present invention can achieve four-axis machining and non-stop material change, effectively improving the working efficiency of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of machining centers, and particularly to a double-spindle and exchangeable-worktable machining center. Background Art

[0002] In numerically controlled machine tools, common machining equipment includes vertical machining centers, horizontal machining centers, lathe machining centers, gantry machining centers, etc. There are many existing structural forms of machining centers, but there is a problem of single machining angle, resulting in low flexibility of the equipment. At the same time, when changing materials, the machine needs to be paused to change materials, resulting in low machining efficiency of the machining center. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a double-spindle and exchangeable-worktable machining center, which can achieve four-axis machining and non-stop material changing, effectively improving the working efficiency of the equipment.

[0004] A double-spindle and exchangeable-worktable machining center according to the present invention includes a machine table, a three-axis motion device, one or two first rotating mechanisms, one or two spindles, a transposition device, and two worktables. One end of the machine table is set as a machining station, and the other end is set as a loading and unloading station; the three-axis motion device includes one or two X-axis motion mechanisms, one or two Y-axis motion mechanisms, and one or two Z-axis motion mechanisms. The X-axis motion mechanism is arranged on the machine table, the Z-axis motion mechanism is arranged on the X-axis motion mechanism, and the Y-axis motion mechanism is arranged on the Z-axis motion mechanism; the first rotating mechanism is arranged on the Y-axis motion mechanism; the spindles are respectively arranged on the first rotating mechanisms in one-to-one correspondence and are located at the machining station. The X-axis motion mechanism, the Y-axis motion mechanism, and the Z-axis motion mechanism are respectively used to drive the corresponding spindles to move along the X-axis, Y-axis, and Z-axis directions, and the first rotating mechanism is used to drive the corresponding spindles to rotate; the transposition device is arranged on the machine table; the two worktables are placed on the transposition device, and one of the worktables is located at the machining station and the other is located at the loading and unloading station. The transposition device is used to drive the rotation and transposition between the two worktables.

[0005] The double-spindle and exchangeable-worktable machining center according to the embodiments of the present invention has at least the following beneficial effects:

[0006] The double-spindle exchange workbench machining center of the present invention enables the machining center to achieve four-axis machining through the cooperation between the X-axis movement mechanism, Y-axis movement mechanism, Z-axis movement mechanism, and the first rotation mechanism. At the same time, the first rotation mechanism drives the spindle to rotate and change the angle, making the spindle machining more flexible. In addition, when machining the product on the workbench at the machining station, loading and unloading can be carried out on the workbench at the loading and unloading station. After the product in the working area is machined, the two workbenches are rotated and exchanged positions through the transposition device, so that the workbench at the loading and unloading station rotates to the machining station, and the workbench at the machining station rotates to the loading and unloading station, thereby realizing non-stop material change, greatly improving the utilization rate of the equipment, and making the automation degree of the equipment higher.

[0007] According to some embodiments of the present invention, it further includes a machine base. The X-axis movement mechanism includes a first linear driving device, and the first linear driving device is arranged on the machine base and is used to drive the spindle to move along the X-axis direction.

[0008] According to some embodiments of the present invention, the Z-axis movement mechanism includes a column and a second linear driving device. The column is arranged on the first linear driving device, and the second linear driving device is arranged on the column and is used to drive the spindle to move along the Z-axis direction.

[0009] According to some embodiments of the present invention, the Y-axis movement mechanism includes a mounting block and a third linear driving device. The mounting block is arranged on the second linear driving device, and the third linear driving device is arranged on the mounting block and is used to drive the spindle to move along the Y-axis direction.

[0010] According to some embodiments of the present invention, the transposition device includes a rotating plate and a second rotation mechanism. The second rotation mechanism is arranged on the machine base, the rotating plate is connected to the second rotation mechanism, and the second rotation mechanism is used to rotate the rotating plate.

[0011] According to some embodiments of the present invention, it further includes one or two support mechanisms. The support mechanisms are arranged on the machine base and are used to support the workbench after it is transported in place.

[0012] According to some embodiments of the present invention, the support mechanism includes a support plate and a bracket. The bracket is arranged on the machine base, the support plate is arranged on the bracket, a plurality of positioning protrusions are arranged on the support plate, and a plurality of positioning grooves are arranged on the workbench and are matched with the positioning protrusions. After the workbench is transported in place, it is placed on the support plate, and the positioning protrusions are placed in the corresponding positioning grooves.

[0013] According to some embodiments of the present invention, the support plate includes an upper support plate and a lower support plate, the lower support plate is arranged on the bracket, the upper support plate can be slid up and down on the lower support plate, and the upper support plate is used to receive the workbench, the positioning protrusion is arranged on the lower support plate, and a through-hole corresponding to the positioning protrusion is opened on the upper support plate, and when the upper support plate slides downward in a direction close to the lower support plate, the positioning protrusion can pass through the through-hole and protrude from the upper support plate.

[0014] According to some embodiments of the present invention, a buffer mechanism is provided on the upper support plate, and the buffer mechanism is used to provide buffering when the upper support plate receives the workbench.

[0015] According to some embodiments of the present invention, a tool magazine is further included. The tool magazine is arranged on the machine platform, and the number of the tool magazine is equal to the number of the spindles.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a schematic diagram of the overall structure of the dual-spindle exchange worktable machining center of the present invention;

[0019] Figure 2 for Figure 1 The schematic diagram of the structure of the double-spindle exchange table machining center after removing the position change device and the workbench is shown in FIG;

[0020] Figure 3 for Figure 1 A schematic structural diagram of the transposition device, the support mechanism and the buffer mechanism shown in FIG;

[0021] Figure 4 for Figure 3 A schematic structural diagram of the buffer mechanism shown in FIG;

[0022] Figure 5 for Figure 3 A top view of the transposition device, support mechanism and buffer mechanism shown in FIG;

[0023] Figure 6 for Figure 5 The cross-sectional view at AA shown in FIG;

[0024] Figure 7 for Figure 1 The structural diagram of the workbench shown in FIG;

[0025] Figure 8 forFigure 1 Schematic structural diagram of a double-spindle exchange table machining center showing a set of three-axis motion devices, spindles, and tool magazines;

[0026] Figure 9 For Figure 1 Schematic structural diagram of another set of three-axis motion devices, spindles, and tool magazines of the double-spindle exchange table machining center shown in

[0027] Reference numerals:

[0028] 100, three-axis motion device; 110, X-axis motion mechanism; 111, first linear drive device; 120, Z-axis motion mechanism; 121, column; 130, Y-axis motion mechanism; 131, mounting block; 132, third linear drive device; 200, first rotating mechanism; 210, rotating motor; 220, turntable; 300, spindle; 400, worktable; 410, positioning groove; 500, transposition device; 510, rotating plate; 511, opening; 520, second rotating mechanism; 600, machine base; 700, sliding assembly; 710, slide rail; 720, slider; 800, support mechanism; 810, support plate; 811, positioning protrusion; 812, upper support plate; 813, lower support plate; 814, through hole; 820, bracket; 900, buffer mechanism; 910, connecting block; 920, buffer head; 930, connecting rod; 940, spring; 1100, tool magazine. Detailed implementation manners

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, left, right, front, back, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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, and thus should not be construed as a limitation of the present invention.

[0031] In the description of the present invention, if the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0033] The following refers to the attached Figure 1 to the attached Figure 9 to describe the double-spindle exchange table machining center of the present invention.

[0034] Referring to Figures 1 to 9 As shown in the figure, a double-spindle exchange table machining center according to this embodiment includes a machine base 600, a three-axis motion device 100, one or two first rotating mechanisms 200, one or two spindles 300, a transposition device 500, and two worktables 400. One end of the machine base 600 is set as the machining station, and the other end is set as the loading and unloading station; the three-axis motion device 100 includes one or two X-axis motion mechanisms 110, one or two Y-axis motion mechanisms 130, and one or two Z-axis motion mechanisms 120. The X-axis motion mechanism 110 is arranged on the machine base 600, the Z-axis motion mechanism 120 is arranged on the X-axis motion mechanism 110, and the Y-axis motion mechanism 130 is arranged on the Z-axis motion mechanism 120; the first rotating mechanism 200 is arranged on the Y-axis motion mechanism 130; the spindles 300 are respectively arranged on the first rotating mechanisms 200 in one-to-one correspondence and are located at the machining station. The X-axis motion mechanism 110, the Y-axis motion mechanism 130, and the Z-axis motion mechanism 120 are respectively used to drive the corresponding spindles 300 to move along the X-axis, Y-axis, and Z-axis directions, and the first rotating mechanism 200 is used to drive the corresponding spindles 300 to rotate; the transposition device 500 is arranged on the machine base 600; the two worktables 400 are placed on the transposition device 500, and one of the worktables 400 is located at the machining station, and the other worktable 400 is located at the loading and unloading station. The transposition device 500 is used to drive the rotation and transposition between the two worktables 400.

[0035] It can be understood that, referring to Figure 1 and Figure 2 In this embodiment, the first rotating mechanism 200 drives the spindle 300 to rotate, making the spindle 300 more flexible in machining and effectively improving the machining accuracy of the product. Among them, in this embodiment, the first rotating mechanism 200 can adopt the cooperation of a rotating motor 210 and a turntable 220 to realize the rotation of the spindle 300; specifically, the rotating motor 210 is arranged on the Y-axis motion mechanism 130, the turntable 220 is arranged on the output shaft of the rotating motor 210, and the spindle 300 is arranged on the turntable 220. By driving the turntable 220 to rotate through the rotating motor 210, the spindle 300 is driven to rotate, so as to increase the machining angle of the spindle 300 and make the machining of the spindle 300 more flexible.

[0036] It can be understood that, referring to Figure 1 andFigure 2 In this embodiment, two main shafts 300 are provided. The two main shafts 300 can simultaneously process a workpiece, greatly improving the processing efficiency. In addition, in some other embodiments, the two main shafts 300 can also simultaneously process two workpieces respectively to improve the processing efficiency. Of course, according to the actual situation, in some other embodiments, the number of main shafts 300 can also be set to one or three, and the specific number is not limited here.

[0037] Among them, referring to Figure 1 and Figure 2 , in this embodiment, one X-axis movement mechanism 110 is provided, and two Y-axis movement mechanisms 130, two Z-axis movement mechanisms 120 and two first rotation mechanisms 200 are provided according to the number of main shafts 300, so that they can respectively control the actions of the two main shafts 300, thereby improving the working efficiency of the equipment. Of course, according to the actual situation, in some other embodiments, the X-axis movement mechanism 110 can also be set to two to respectively drive the two main shafts 300 to move along the X-axis. The specific numbers of the X-axis movement mechanism 110, Y-axis movement mechanism 130, Z-axis movement mechanism 120 and first rotation mechanism 200 are not limited here.

[0038] It can be understood that referring to Figure 1 , in this embodiment, two worktables 400 are provided. Among them, one end of the machining center close to the main shaft 300 is set as the machining station, and the other end is set as the loading and unloading station. When one worktable 400 is at the machining station, the main shaft 300 processes the product on this worktable 400. At the same time, the other worktable 400 is at the loading and unloading station. First, the processed product is taken off, and then the next product to be processed is placed on this worktable 400. After the product at the machining station is processed, the transposition device 500 transposes the two worktables 400 to achieve non-stop material replacement of the equipment, effectively improving the utilization rate and automation degree of the equipment.

[0039] It can be understood that in this embodiment, the worktable 400 is placed on the transposition device 500. When the worktable 400 needs to be transposed, the transposition device 500 rotates the two worktables 400 to the corresponding stations, and the main shaft 300 starts to process the product at the machining station. At the same time, the worktable 400 at the loading and unloading station can be loaded.

[0040] It can be understood that the double-spindle exchange table machining center further includes a spindle swing mechanism and a table drive mechanism. The spindle swing mechanism is used to drive the spindle to swing, and the table drive mechanism drives the table to rotate. Among them, in this embodiment, there are two sets of X-axis movement mechanisms 110, Y-axis movement mechanisms 130, Z-axis movement mechanisms 120, and spindle swing mechanisms, and one set of table drive mechanisms and transposition devices 500 are provided to achieve five-sided machining with double-spindle non-stop material change.

[0041] In addition, in some other embodiments, there is one set of X-axis movement mechanism 110, Y-axis movement mechanism 130, Z-axis movement mechanism 120, spindle swing mechanism, table drive mechanism, and transposition device 500 to achieve five-sided machining with single-spindle non-stop material change.

[0042] Alternatively, in some other embodiments, five-sided machining with double-spindle stop-and-change material can be achieved through two sets of X-axis movement mechanisms 110, two sets of Y-axis movement mechanisms 130, two sets of Z-axis movement mechanisms 120, two sets of spindle swing mechanisms, and one set of table drive mechanisms.

[0043] Furthermore, in some other embodiments, five-sided machining with single-spindle stop-and-change material can be achieved through one set of X-axis movement mechanism 110, one set of Y-axis movement mechanism 130, one set of Z-axis movement mechanism 120, one set of spindle swing mechanism, and one set of table drive mechanism.

[0044] Specifically, the double-spindle exchange table machining center of the present invention enables the machining center to achieve four-axis machining through the cooperation between the X-axis movement mechanism 110, Y-axis movement mechanism 130, Z-axis movement mechanism 120, and the first rotation mechanism 200. At the same time, the first rotation mechanism 200 drives the spindle 300 to rotate and change the angle, making the machining of the spindle 300 more flexible. In addition, one end of the machining center close to the spindle 300 is set as the machining station, and the other end is set as the loading and unloading station. When the product on the table 400 at the machining station is being machined, loading can be carried out on the table 400 at the loading and unloading station. After the product in the working area is machined, the table 400 is lifted by the transposition device 500 and then rotated and transposed, so that the table 400 at the loading and unloading station rotates to the machining station, and the table 400 at the machining station rotates to the loading and unloading station, thereby achieving non-stop material change, greatly improving the utilization rate of the equipment, and making the automation degree of the equipment higher.

[0045] It can be understood that referring to Figure 1 and Figure 2 , in this embodiment, the double-spindle exchange table machining center further includes a machine base 600. The X-axis movement mechanism 110 includes a first linear drive device 111, and the first linear drive device 111 is arranged on the machine base 600 and is used to drive the spindle 300 to move along the X-axis direction.

[0046] It is understandable that, with reference to Figure 1 and Figure 2 , in this embodiment, the Z-axis moving mechanism 120 includes a column 121 and a second linear driving device (not shown in the drawings). The column 121 is arranged on the first linear driving device 111, and the second linear driving device is arranged on the column 121 and is used to drive the main shaft 300 to move in the Z-axis direction.

[0047] It is understandable that, with reference to Figure 1 and Figure 2 , in this embodiment, the Y-axis moving mechanism 130 includes a mounting block 131 and a third linear driving device 132. The mounting block 131 is arranged on the second linear driving device, and the third linear driving device 132 is arranged on the mounting block 131 and is used to drive the main shaft 300 to move in the Y-axis direction.

[0048] Among them, in this embodiment, the first linear driving device 111 can be realized by a linear motor for driving. Specifically, the linear motor is arranged on the machine table 600 along the X-axis direction, the column 121 is arranged on the linear motor, and the column 121 is driven by the linear motor to move along the X-axis direction, so as to drive the main shaft 300 to move along the X-axis direction. In addition, in some other embodiments, the first linear driving device 111 can also be realized by the cooperation of a motor and a lead screw. Specifically, the motor is arranged on the machine table 600, the lead screw is arranged along the X-axis, and one end of the lead screw is connected to the motor, and the other end is rotatably connected to the machine table 600. The column 121 is connected to the lead screw nut on the lead screw. The motor drives the lead screw to rotate, so as to drive the lead screw nut to move along the X-axis direction, thereby driving the column 121 to move along the X-axis direction to drive the main shaft 300 to move along the X-axis direction.

[0049] Among them, in this embodiment, the second linear driving device and the third linear driving device 132 can also be realized by a linear motor for driving. Specifically, the linear motor of the second linear driving device is arranged on the column 121 along the Z-axis direction, the mounting block 131 is arranged on the linear motor, and the linear motor drives the mounting block 131 to move along the Z-axis direction to drive the main shaft 300 to move along the Z-axis direction. At the same time, the linear motor of the third linear driving device 132 is arranged on the mounting block 131 along the Y-axis direction, and the first rotating mechanism 200 is arranged on the linear motor. The linear motor drives the first rotating mechanism 200 to move along the Y-axis direction to drive the main shaft 300 to move along the Y-axis direction.

[0050] In addition, in some other embodiments, the second linear driving device and the third linear driving device 132 can also be driven by cooperating a motor with a lead screw. The lead screw of the second linear driving device is arranged on the column 121 along the Z-axis direction, and the lead screw of the third linear driving device 132 is arranged on the mounting block 131 along the Y-axis direction. The motor drives the corresponding lead screw to rotate respectively, so as to drive the main shaft 300 to move along the Z-axis and Y-axis directions.

[0051] It can be understood that, referring to Figure 1 and Figure 2 , in this embodiment, the double-spindle exchange table machining center further includes a plurality of sliding components 700, and the sliding components 700 are respectively arranged on the machine table 600, the column 121 and the mounting block 131 along the X-axis, Z-axis and Y-axis directions; specifically, the sliding component 700 arranged on the machine table 600 is set as the first sliding component, the sliding component 700 arranged on the column 121 is set as the second sliding component, and the sliding component 700 arranged on the mounting block 131 is set as the third sliding component. The column 121 is connected to the first sliding component, the mounting block 131 is connected to the second sliding component, and the first rotating mechanism 200 is connected to the third sliding component, so as to guide the movement of the column 121, the mounting block 131 and the first rotating mechanism 200, make their movement smoother and more stable, and thus ensure the stable movement of the main shaft 300.

[0052] Specifically, referring to Figure 1 and Figure 2 , in this embodiment, the sliding component 700 can realize sliding guidance by cooperating a slide rail 710 with a slider 720; specifically, the slide rail 710 is arranged on the machine table 600, the column 121 and the mounting block 131 along the X-axis, Z-axis and Y-axis directions, the slider 720 is respectively slidably connected to the corresponding slide rail 710, the column 121 is connected to the slider 720 of the first sliding component, the mounting block 131 is connected to the slider 720 of the second sliding component, and the first rotating mechanism 200 is connected to the slider 720 of the third sliding component.

[0053] It can be understood that, in this embodiment, both the column 121 and the mounting block 131 adopt a hollow frame structure, making the overall movement of the three-axis motion device 100 lighter, so as to be able to drive the rapid movement and feed machining of the main shaft 300. At the same time, the machine table 600 also adopts a hollow frame structure, making the overall weight of the machining center lighter and facilitating the subsequent movement and handling of the equipment.

[0054] It can be understood that, referring to Figure 1 and Figure 3In this embodiment, the transposition device 500 includes a rotating plate 510 and a second rotating mechanism 520. The second rotating mechanism 520 is disposed on the machine 600. The rotating plate 510 is connected to the second rotating mechanism 520. The second rotating mechanism 520 is used to drive the rotating plate 510 to rotate.

[0055] Specifically, in this embodiment, the two workbenches 400 are respectively arranged on the two ends of the rotating plate 510. When the workbenches 400 need to be replaced, the second rotating mechanism 520 drives the rotating plate 510 to rotate, thereby driving the rotation and replacement between the two workbenches 400, thereby realizing non-stop material replacement of the equipment.

[0056] It is understood that, in addition to placing the workbench 400 on the rotating plate 510, referring to Figure 1 and Figure 3 In this embodiment, one or two supporting mechanisms 800 can also be set. The supporting mechanism 800 is set on the machine platform 600 and is used to support the workbench 400 after it is transported into place; at the same time, in this embodiment, the second rotating mechanism 520 can use a cam divider with a lifting function to realize rotation and lifting.

[0057] Specifically, in this embodiment, two support mechanisms 800 are provided, one of which is provided at the processing station, and the other is provided at the loading and unloading station; specifically, when the two workbenches 400 need to be switched, the cam divider drives the rotating plate 510 to move upward to receive the workbench 400, and then the cam divider drives the rotating plate 510 to rotate, rotating the workbench 400 to above the corresponding station, and then the cam divider drives the rotating plate 510 to move downward again, thereby driving the workbench 400 to fall and be placed on the corresponding support mechanism 800, and the cam divider continues to drive the rotating plate 510 to descend, and the rotating plate 510 is separated from the workbench 400, thereby avoiding greater pressure on the rotating plate 510 during product processing or loading, thereby ensuring the service life of the rotating plate 510, and making the processing and loading and unloading of products more stable.

[0058] In addition, in some other embodiments, only one supporting mechanism 800 may be provided, and it is disposed at a processing station to support the workbench 400 that rotates to the processing station.

[0059] Specifically, refer to Figure 3 and Figure 5 In this embodiment, openings 511 are respectively provided at both ends of the rotating plate 510 for the support plate 810 to pass through. After the rotating plate 510 transports the workbench 400 to the position, the cam divider drives the rotating plate 510 to descend, so that the support plate 810 passes through the opening 511, so that the workbench 400 falls on the support plate 810 and is separated from the rotating plate 510.

[0060] It can be understood that, with reference to Figures 3 to 7 , in this embodiment, the support mechanism 800 includes a support plate 810 and a bracket 820. The bracket 820 is arranged on the machine table 600, the support plate 810 is arranged on the bracket 820, a plurality of positioning protrusions 811 are arranged on the support plate 810, and a plurality of positioning grooves 410 matching with the positioning protrusions 811 are arranged on the workbench 400. After the workbench 400 is conveyed in place, it is placed on the support plate 810, and the positioning protrusions 811 are placed in the corresponding positioning grooves 410. The workbench 400 is positioned and fixed by the cooperation of the positioning protrusions 811 and the positioning grooves 410, so as to avoid the offset of the workbench during the product processing or feeding process, thereby affecting the processing quality of the product.

[0061] It can be understood that, with reference to Figures 3 to 7 , in this embodiment, the support plate 810 includes an upper support plate 812 and a lower support plate 813. The lower support plate 813 is arranged on the bracket 820, the upper support plate 812 is slidably arranged on the lower support plate 813 up and down, and the upper support plate 812 is used to receive the workbench 400. The positioning protrusions 811 are arranged on the lower support plate 813, and through holes 814 corresponding to the positioning protrusions 811 are formed on the upper support plate 812. When the upper support plate 812 slides downward in the direction close to the lower support plate 813, the positioning protrusions 811 can pass through the through holes 814 and protrude from the upper support plate 812. Specifically, when the workbench 400 is placed on the upper support plate 812, the workbench 400 presses down the upper support plate 812, so that the positioning protrusions 811 protrude upward from the through holes 814 and are placed in the positioning grooves 410 of the workbench 400, thereby positioning and fixing the workbench 400.

[0062] It can be understood that, with reference to Figures 3 to 6 , in this embodiment, a buffer mechanism 900 is arranged on the upper support plate 812. The buffer mechanism 900 is used to buffer when the upper support plate 812 receives the workbench 400, so as to reduce the impact on the support plate 810 caused by the direct fall of the workbench 400, thereby ensuring the service life of the support plate 810.

[0063] Specifically, with reference to Figure 4 and Figure 6, in this embodiment, the buffer mechanism 900 includes a connection block 910, a buffer head 920, a connecting rod 930, and a spring 940. The connection block 910 is disposed on the bracket 820, the connecting rod 930 is disposed on the connection block 910, the spring 940 is sleeved on the connecting rod 930, the buffer head 920 is movably disposed on the connection block 910, and is sleeved on the top end of the connecting rod 930, so that the bottom surface of the buffer head 920 is in contact with the top end of the spring 940. The top end of the buffer head 920 passes through the lower support plate 813 and is connected to the upper support plate 812. When the workbench 400 falls onto the upper support plate 812, the workbench 400 presses the upper support plate 812 downward, causing the upper support plate 812 to push the buffer head 920 downward, and the buffer head 920 squeezes the spring 940 downward, thereby transmitting the force of the falling of the workbench 400 to the spring 940, so as to buffer the falling of the workbench 400.

[0064] It can be understood that, referring to Figure 1 and Figure 2 , in this embodiment, the double-spindle exchange workbench machining center further includes a tool magazine 1100. The tool magazine 1100 is disposed on the machine table 600, and the number thereof is equal to the number of spindles. Specifically, in this embodiment, two tool magazines 1100 are provided according to the number of spindles 300, and the two tool magazines 1100 are respectively disposed on both sides of the machine table 600 and on one side of the corresponding spindle 300, so that the spindle 300 can achieve rapid tool change at a short distance, thereby improving the machining efficiency.

[0065] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A double-spindle exchangeable workbench machining center, characterized in that, Comprising: A machine tool, one end of the machine tool is set as a processing station, and the other end is set as a loading and unloading station; A three-axis motion device, the three-axis motion device includes one or two X-axis motion mechanisms, one or two Y-axis motion mechanisms and one or two Z-axis motion mechanisms. The X-axis motion mechanism is arranged on the machine tool, the Z-axis motion mechanism is arranged on the X-axis motion mechanism, and the Y-axis motion mechanism is arranged on the Z-axis motion mechanism; One or two first rotating mechanisms, the first rotating mechanism is arranged on the Y-axis motion mechanism; One or two spindles, the spindles are respectively arranged on the first rotating mechanisms in one-to-one correspondence and located at the processing station. The X-axis motion mechanism, the Y-axis motion mechanism and the Z-axis motion mechanism are respectively used to drive the corresponding spindles to move along the X-axis, Y-axis and Z-axis directions, and the first rotating mechanism is used to drive the corresponding spindles to rotate; A transposition device, the transposition device is arranged on the machine tool; Two worktables, the two worktables are placed on the transposition device, and one of the worktables is located at the processing station, and the other worktable is located at the loading and unloading station. The transposition device is used to drive the rotation and transposition between the two worktables; One or two support mechanisms, the support mechanism is arranged on the machine tool and is used to support the worktable after being conveyed in place. The support mechanism includes a support plate and a bracket. The bracket is arranged on the machine tool, the support plate is arranged on the bracket, and a plurality of positioning protrusions are arranged on the support plate. A plurality of positioning grooves are arranged on the worktable and are matched with the positioning protrusions. After the worktable is conveyed in place, it is placed on the support plate, and the positioning protrusions are placed in the corresponding positioning grooves. The support plate includes an upper support plate and a lower support plate. The lower support plate is arranged on the bracket, and the upper support plate is slidably arranged on the lower support plate, and the upper support plate is used to receive the worktable. A buffer mechanism is arranged on the upper support plate, and the buffer mechanism is used to buffer when the upper support plate receives the worktable; The buffer mechanism includes a connecting block, a buffer head, a connecting rod and a spring. The connecting block is arranged on the bracket, the connecting rod is arranged on the connecting block, the spring is sleeved on the connecting rod, the buffer head is movably arranged on the connecting block and is sleeved on the top end of the connecting rod, so that the bottom surface of the buffer head is in contact with the top end of the spring, and the top end of the buffer head passes through the lower support plate and is connected to the upper support plate.

2. The machining center with a double-spindle exchangeable worktable according to claim 1, characterized in that, The X-axis motion mechanism includes a first linear driving device, and the first linear driving device is arranged on the machine tool and is used to drive the spindle to move along the X-axis direction.

3. A double-spindle exchangeable worktable machining center according to claim 2, characterized in that, The Z-axis motion mechanism includes a column and a second linear driving device. The column is arranged on the first linear driving device, and the second linear driving device is arranged on the column and is used to drive the spindle to move along the Z-axis direction.

4. A double-spindle exchangeable worktable machining center according to claim 3, characterized in that, The Y-axis motion mechanism includes a mounting block and a third linear driving device. The mounting block is arranged on the second linear driving device, and the third linear driving device is arranged on the mounting block and is used to drive the main shaft to move in the Y-axis direction.

5. A double-spindle exchangeable workbench machining center according to claim 1, characterized in that, The transposition device includes a rotating plate and a second rotating mechanism. The second rotating mechanism is arranged on the machine table, the rotating plate is connected to the second rotating mechanism, the second rotating mechanism is used to drive the rotating plate to rotate, and the rotating plate is used to carry the workbench and drive the workbench to rotate and transpose.

6. A double-spindle exchangeable worktable machining center according to claim 1, characterized in that, The positioning protrusion is arranged on the lower support plate, and a through hole corresponding to the positioning protrusion is formed on the upper support plate. When the upper support plate slides downward in the direction close to the lower support plate, the positioning protrusion can pass through the through hole and protrude from the upper support plate.

7. A double-spindle exchangeable worktable machining center according to claim 1, wherein It further includes a tool magazine, which is arranged on the machine table and the number thereof is equal to the number of main shafts.

Images