CN214135068U

CN214135068U - Gantry machining center

Info

Publication number: CN214135068U
Application number: CN202023351205.4U
Authority: CN
Inventors: 龙夏明
Original assignee: Dongguan Ruize Machinery Co ltd
Current assignee: Dongguan Ruize Machinery Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-07
Anticipated expiration: 2030-12-31

Abstract

The utility model belongs to the technical field of machine tools, in particular to a gantry machining center, which comprises a machine table, wherein a plurality of gantry supports are arranged on the machine table, a slide rail sequentially passes through each gantry support and is connected on the machine table, a first workbench and a second workbench are connected on the slide rail in a sliding way, the first workbench and the second workbench are both connected with a workbench driving assembly, and pneumatic clamping jigs are arranged on the first workbench and the second workbench; the rough milling mechanism is arranged on one gantry support and used for roughly processing a workpiece arranged on the first workbench, and the fine milling mechanism is arranged on the other gantry support and used for finely processing the workpiece arranged on the second workbench; a lifting mechanism and a clamping mechanism for clamping a workpiece are arranged between the fine milling mechanism and the rough milling mechanism, and the lifting mechanism is connected with the clamping mechanism and is used for driving the clamping mechanism to move up and down; the former machined part carries out the finish machining and carries out rough machining to the back machined part simultaneously, improves machining efficiency.

Description

Gantry machining center

Technical Field

The utility model belongs to the technical field of the lathe, especially, relate to a longmen machining center.

Background

The numerical control machining center is a high-efficiency automatic machine tool which consists of mechanical equipment and a numerical control system and is suitable for machining complex parts, the numerical control machining center is one of numerical control machines which are highest in yield and most widely applied in the world at present, the comprehensive machining capacity of the numerical control machining center is high, a workpiece can finish more machining contents after being clamped once, the machining precision is high, batch workpieces with medium machining difficulty can be machined, the efficiency is 5-10 times that of common equipment, especially, the numerical control machining center can finish machining which cannot be finished by a plurality of common equipment, and the numerical control machining center is more suitable for single-piece machining or medium and small batch multi-variety production, but when plane milling or engraving milling with high precision requirements, the machining efficiency of the existing machining center is low and the requirements are difficult to meet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a longmen machining center aims at solving the technical problem that longmen machining center machining efficiency among the prior art is low.

In order to achieve the above object, an embodiment of the present invention provides a gantry machining center, which includes a machine table, wherein a plurality of gantry supports are disposed on the machine table, a slide rail sequentially passes through each gantry support and is connected to the machine table, a first workbench and a second workbench are slidably connected to the slide rail, the first workbench and the second workbench are both connected to a workbench driving assembly, and pneumatic clamping jigs are disposed on the first workbench and the second workbench; the rough milling mechanism is arranged on one of the gantry supports and used for roughly processing the workpiece on the first workbench, and the fine milling mechanism is arranged on the other gantry support and used for finely processing the workpiece on the second workbench; and a lifting mechanism and a material clamping mechanism for clamping a workpiece are arranged between the finish milling mechanism and the rough milling mechanism, and the lifting mechanism is connected with the material clamping mechanism and is used for driving the material clamping mechanism to move up and down.

Optionally, two groups of the workbench driving assemblies are arranged, and each of the two groups of the workbench driving assemblies comprises a first motor, a first screw rod, a first nut and a connecting seat; the first motor and the connecting seat are connected to the machine table, one end of the first screw rod is connected with the output end of the first motor, the other end of the first screw rod is rotatably connected with the connecting seat, and the first nut is in threaded connection with the first screw rod; the first workbench and the second workbench are respectively connected to the first nuts of the two workbench driving assemblies.

Optionally, the lifting mechanism includes a lifting fixed plate, a lifting movable plate, a guide rod, a second screw rod, a second nut and a second motor; the lift fixed plate connect in on the gantry support, the one end of guide arm connect in on the board, the other end of guide arm connect in on the lift fixed plate, lift fly leaf sliding connection in on the guide arm, the second motor connect in on the lift fixed plate, the second lead screw connect in the output of second motor, second nut threaded connection in on the second lead screw, just the second nut with the lift fly leaf is connected, press from both sides the material mechanism and locate on the lift fly leaf.

Optionally, a through hole is formed in the lifting fixing plate, a first mounting seat is arranged on the upper side of the through hole, a second mounting seat is arranged on one side of the first mounting seat, the second motor is connected to the second mounting seat, a first transmission wheel is arranged on an output shaft of the second motor, one end of the second lead screw penetrates through the through hole and then is rotatably connected to the first mounting seat, a second transmission wheel is arranged on the second lead screw, and the second transmission wheel is connected with the first transmission wheel through a belt in a transmission mode.

Optionally, the material clamping mechanism comprises a material clamping plate, a first gripper, a second gripper, a first rack, a second rack and a third motor; the first rack and the second rack are both connected to the material clamping plate in a sliding mode, the third motor is connected to the material clamping plate, an output shaft of the third motor is connected with a first gear, the first gear is meshed with the first rack and the second rack respectively, the first gripper is connected with the first rack, and the second gripper is connected with the second rack.

Optionally, the rough milling mechanism comprises a first rough milling moving assembly, a second rough milling moving assembly and a rough milling machining assembly; the first rough milling moving assembly is connected to the gantry support in a sliding mode, the second rough milling moving assembly is connected to the first rough milling moving assembly in a sliding mode and intersected with the moving direction of the first rough milling moving assembly, and the rough milling processing assembly is connected to the second rough milling moving assembly and used for roughly processing a processed part.

Optionally, the finish milling mechanism includes a first finish milling moving assembly, a second finish milling moving assembly, a finish milling processing assembly and a tool changing assembly; the first finish milling moving assembly is connected to the gantry support in a sliding mode, the second finish milling moving assembly is connected to the first finish milling moving assembly in a sliding mode and intersected with the moving direction of the first finish milling moving assembly, and the finish milling machining assembly is connected to the second finish milling moving assembly and used for performing finish machining on a machined part; the tool changing assembly is connected to the gantry support and used for placing different tools into the finish milling assembly.

Optionally, the tool changing assembly comprises a tool changing fixing table, a tool disc, a turnover clamping piece, a tool changing swing arm, a linear module, a fourth motor and a tool changing seat; the tool changing fixing table is connected to the gantry support, the cutter disc is rotatably connected to the tool changing fixing table, a plurality of tools are clamped on the cutter disc, the overturning clamping piece is rotatably arranged at the bottom of the tool changing fixing table, and a first tool clamping groove used for being clamped with the tools is formed in one end of the overturning clamping piece; the linear module is connected to the tool changing fixing table, a sliding block of the linear module is connected with the fourth motor and used for driving the fourth motor to move up and down, the tool changing swing arm is arranged below the turnover clamping piece, the middle of the tool changing swing arm is connected to an output shaft of the fourth motor, and second tool clamping grooves used for being clamped with tools are formed in two ends of the tool changing swing arm.

Optionally, the first finish milling moving assembly includes a fifth motor, a third screw, a third nut, and a first finish milling moving table, the fifth motor is connected to the gantry support, the third screw is connected to an output shaft of the fifth motor, the third nut is connected to the third screw in a threaded manner, and the first finish milling moving table is connected to the gantry support in a sliding manner and is connected to the third nut; the second fine milling moving assembly comprises a sixth motor, a fourth screw rod, a fourth nut and a second fine milling moving table, the sixth motor is connected to the first fine milling moving table, the fourth screw rod is connected to an output shaft of the sixth motor, the fourth nut is in threaded connection with the fourth screw rod, and the second fine milling moving table is in sliding connection with the first fine milling moving table and is connected with the fourth nut; and the fine milling processing assembly is connected to the second fine milling mobile station.

Optionally, the finish milling machining assembly comprises a sixth motor and a tool handle, the sixth motor is connected to the second finish milling moving assembly, the tool handle is connected to the output end of the sixth motor, and one end, away from the sixth motor, of the tool handle is provided with a mounting groove for mounting the tool.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the longmen machining center have one of following technological effect at least: the machining part is placed on a first workbench and clamped through a pneumatic clamping mechanism, the rough milling mechanism performs rough machining on the machining part, the first workbench moves to the lower side of a clamping mechanism after rough machining is completed, a lifting mechanism drives the clamping mechanism to move downwards, the clamping mechanism clamps the machining part, the pneumatic clamping mechanism of the first workbench releases the machining part, the lifting mechanism drives the clamping mechanism to move upwards, the first workbench moves far away from the clamping mechanism, a second workbench moves to the lower side of the clamping mechanism, the lifting mechanism drives the clamping mechanism to move downwards, the machining part is placed on the pneumatic clamping mechanism of the second workbench, the pneumatic clamping mechanism clamps the machining part, the lifting mechanism drives the clamping mechanism to move upwards, the second workbench moves to the lower side of a finish milling mechanism, and the finish milling mechanism performs finish machining on the machining part; the machined part after the rough machining is accomplished is carried and is carried out the finish machining to next station, and preceding machined part carries out the finish machining and carries out the rough machining to back machined part when carrying out the finish machining, the utility model discloses set up rough milling mechanism and finish milling mechanism to carry out rough machining or finish machining simultaneously to different work pieces, reduce process time by a wide margin, improve machining efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural view of a gantry machining center provided by the embodiment of the present invention.

Fig. 2 is a schematic structural view of a gantry machining center provided by the embodiment of the present invention.

Fig. 3 is a front view of a gantry machining center provided by the embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10-machine platform 11-gantry support 12-slide rail

13-first working table 14-second working table 20-rough milling mechanism

30-finish milling mechanism 31-tool changing assembly 40-material clamping mechanism

50-lifting mechanism.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-3 are exemplary and intended to be used to illustrate embodiments of the present invention, and should not be construed as limiting the invention.

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," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1 to 3, a gantry machining center is provided, which includes a machine table 10, wherein a plurality of gantry supports 11 are disposed on the machine table 10, a slide rail 12 sequentially passes through each gantry support 11 and is connected to the machine table 10, the slide rail 12 is slidably connected to a first workbench 13 and a second workbench 14, the first workbench 13 and the second workbench 14 are both connected to a workbench driving assembly, and the first workbench 13 and the second workbench 14 are both provided with a pneumatic clamping fixture; a rough milling mechanism 20 is arranged on one of the gantry supports 11 for roughly processing the workpiece placed on the first workbench 13, and a finish milling mechanism 30 is arranged on the other gantry support 11 for finish processing the workpiece placed on the second workbench 14; a lifting mechanism 50 and a clamping mechanism 40 for clamping a workpiece are arranged between the fine milling mechanism 30 and the rough milling mechanism 20, and the lifting mechanism 50 is connected with the clamping mechanism 40 and is used for driving the clamping mechanism 40 to move up and down.

In the embodiment of the present invention, a workpiece is placed on the first worktable 13 and clamped by the pneumatic clamping device, the rough milling mechanism 20 performs rough milling on the workpiece, after the rough milling is completed, the first worktable 13 moves to the lower side of the clamping mechanism 40, the lifting mechanism 50 drives the clamping mechanism 40 to move downward, the clamping mechanism 40 clamps the workpiece, the pneumatic clamping device of the first worktable 13 releases the workpiece, the lifting mechanism 50 drives the clamping mechanism 40 to move upward, the first worktable 13 moves away from the clamping mechanism 40, the second worktable 14 moves to the lower side of the clamping mechanism 40, the lifting mechanism 50 drives the clamping mechanism 40 to move downward, the workpiece is placed on the pneumatic clamping device of the second worktable 14, the pneumatic clamping device clamps the workpiece, the lifting mechanism 50 drives the clamping mechanism 40 to move upward, the second worktable 14 moves to the lower side of the finish milling mechanism 30, the fine milling mechanism 30 performs fine machining on the machined part; the machined part after the rough machining is accomplished is carried and is carried out the finish machining to next station, and preceding machined part carries out the finish machining and carries out the rough machining to a back machined part when carrying out the finish machining, the utility model discloses set up rough milling mechanism 20 and finish milling mechanism 30 to carry out rough machining or finish machining simultaneously to different work pieces, reduce process time by a wide margin, improve machining efficiency.

In another embodiment of the present invention, two sets of the worktable driving assemblies of the gantry machining center are provided, and each of the two sets of the worktable driving assemblies includes a first motor, a first screw rod, a first nut and a connecting seat; the first motor and the connecting seat are both connected to the machine table 10, one end of the first lead screw is connected with the output end of the first motor, the other end of the first lead screw is rotatably connected with the connecting seat, and the first nut is in threaded connection with the first lead screw; the first workbench 13 and the second workbench 14 are respectively connected to the first nuts of the two sets of workbench driving assemblies; the first motor drives the first screw rod to rotate, the first nut moves to drive the first workbench 13 or the second workbench 14 to move, and the transmission is stable, the structure is stable, and the position precision is high.

In another embodiment of the present invention, the lifting mechanism 50 of the gantry machining center includes a lifting fixing plate, a lifting movable plate, a guide rod, a second screw rod, a second nut and a second motor; the lifting fixing plate is connected to the gantry support 11, one end of the guide rod is connected to the machine table 10, the other end of the guide rod is connected to the lifting fixing plate, the lifting movable plate is connected to the guide rod in a sliding manner, the second motor is connected to the lifting fixing plate, the second screw rod is connected to the output end of the second motor, the second nut is connected to the second screw rod in a threaded manner and connected with the lifting movable plate, and the clamping mechanism 40 is arranged on the lifting movable plate; the second motor drives the second screw rod to rotate, so that the second nut and the second screw rod generate relative motion, the lifting movable plate moves along with the motion of the second nut, the material clamping mechanism 40 is driven to move up and down, and the transmission is stable.

In another embodiment of the present invention, a through hole is formed on the lifting fixing plate of the gantry machining center, a first mounting seat is disposed on an upper side of the through hole, a second mounting seat is disposed on one side of the first mounting seat, the second motor is connected to the second mounting seat, a first transmission wheel is disposed on an output shaft of the second motor, one end of the second lead screw passes through the through hole and is rotatably connected to the first mounting seat, a second transmission wheel is disposed on the second lead screw, and the second transmission wheel is connected to the first transmission wheel through a belt transmission; the second motor rotates, power is transmitted to the second screw rod through the first transmission wheel and the second transmission wheel, the second screw rod rotates to drive the second nut to move, the movable lifting plate moves, the clamping mechanism 40 is driven to move up and down, and transmission is stable.

In another embodiment of the present invention, the material clamping mechanism 40 of the gantry machining center includes a material clamping plate, a first gripper, a second gripper, a first rack, a second rack, and a third motor; the first rack and the second rack are both connected to the material clamping plate in a sliding manner, the third motor is connected to the material clamping plate, an output shaft of the third motor is connected with a first gear, the first gear is respectively meshed with the first rack and the second rack, the first gripper is connected with the first rack, and the second gripper is connected with the second rack; the third motor rotates to drive the first rack and the second rack to slide, so that the first gripper and the second gripper are driven to be close to and far away from each other, and material clamping and discharging are achieved.

In another embodiment of the present invention, the rough milling mechanism 20 of the gantry machining center includes a first rough milling moving component, a second rough milling moving component and a rough milling machining component; the first rough milling moving assembly is connected to the gantry support 11 in a sliding manner, the second rough milling moving assembly is connected to the first rough milling moving assembly in a sliding manner and intersects with the moving direction of the first rough milling moving assembly, and the rough milling processing assembly is connected to the second rough milling moving assembly and is used for roughly processing a processed piece; the first rough milling moving assembly moves along the X-axis direction, the second rough milling moving assembly moves along the Y-axis direction, a plane formed between the X-axis and the Y-axis is perpendicular to the top surface of the machine table 10, the X-axis direction is parallel to the top surface of the machine table 10, the Y-axis direction is perpendicular to the top surface of the machine table 10, and the rough milling machining assemblies are driven to move through the matching movement of the first rough milling moving assembly and the second rough milling moving assembly.

In another embodiment of the present invention, the finish milling mechanism 30 of the gantry machining center includes a first finish milling moving assembly, a second finish milling moving assembly, a finish milling assembly, and a tool changing assembly 31; the first finish milling moving assembly is connected to the gantry support 11 in a sliding manner, the second finish milling moving assembly is connected to the first finish milling moving assembly in a sliding manner and intersects with the moving direction of the first finish milling moving assembly, and the finish milling assembly is connected to the second finish milling moving assembly and is used for finish machining of a machined part; the tool changing assembly 31 is connected to the gantry support 11 for placing different tools into the finish milling assembly; through first finish milling removal subassembly and second finish milling removal subassembly cooperation motion drive finish milling processing subassembly motion, set up tool changing subassembly 31 simultaneously, can carry out different processing to the machined part, the practicality is strong, and the machining precision is high.

In another embodiment of the present invention, the tool changing assembly 31 of the gantry machining center includes a tool changing fixing platform, a tool pan, a turning fastener, a tool changing swing arm, a linear module, a fourth motor and a tool changing base; the tool changing fixing table is connected to the gantry support 11, the cutter disc is rotatably connected to the tool changing fixing table, a plurality of tools are clamped on the cutter disc, the overturning clamping piece is rotatably arranged at the bottom of the tool changing fixing table, and a first tool clamping groove used for being clamped with the tools is formed in one end of the overturning clamping piece; the linear module is connected to the tool changing fixing table, a sliding block of the linear module is connected with the fourth motor and used for driving the fourth motor to move up and down, the tool changing swing arm is arranged below the turnover clamping piece, the middle part of the tool changing swing arm is connected to an output shaft of the fourth motor, and two ends of the tool changing swing arm are provided with second tool clamping grooves used for being clamped with tools; the cutter head rotates to enable a needed cutter to be conveyed to one side close to the bottom of the cutter changing fixing table, the overturning clamping piece rotates and is clamped with the cutter through the first cutter clamping groove, the overturning clamping piece rotates to return to an original point and clamps the cutter away from the cutter head, the linear module drives the fourth motor to move upwards, the cutter changing swing arm moves upwards and clamps the cutter through the second cutter clamping groove, the linear module drives the fourth motor to move downwards, the cutter changing swing arm clamps the cutter away, the cutter leaves the first cutter groove, the fourth motor rotates, the cutter changing swing arm rotates to convey the cutter to one side of the finish milling assembly, the finish milling assembly clamps the cutter, and cutter changing is completed; wherein, other types of tool changing assemblies 31 can be selected for use, and the type of tool changing assembly 31 is not used for limiting the utility model.

In another embodiment of the present invention, the first finish milling moving assembly of the gantry machining center includes a fifth motor, a third screw, a third nut, and a first finish milling moving table, the fifth motor is connected to the gantry support 11, the third screw is connected to an output shaft of the fifth motor, the third nut is connected to the third screw by a thread, and the first finish milling moving table is slidably connected to the gantry support 11 and connected to the third nut; the second fine milling moving assembly comprises a sixth motor, a fourth screw rod, a fourth nut and a second fine milling moving table, the sixth motor is connected to the first fine milling moving table, the fourth screw rod is connected to an output shaft of the sixth motor, the fourth nut is in threaded connection with the fourth screw rod, and the second fine milling moving table is in sliding connection with the first fine milling moving table and is connected with the fourth nut; the fine milling machining assembly is connected to the second fine milling moving table; the fifth motor drives the third screw rod to rotate, the third screw rod drives the third nut to rotate, the third nut drives the first finish milling moving table to move along the X-axis direction, the sixth motor drives the fourth screw rod to rotate, and the fourth nut drives the second finish milling moving table to move along the Y-axis direction.

In another embodiment of the present invention, the finish milling assembly of the gantry machining center includes a sixth motor and a tool holder, the sixth motor is connected to the second finish milling moving assembly, the tool holder is connected to an output end of the sixth motor, and an installation groove for installing the tool is provided at an end of the tool holder away from the sixth motor; the tool is clamped into the tool handle, and the sixth motor drives the tool handle to rotate, so that the tool is driven to rotate to process a machined part.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A gantry machining center comprises a machine table and is characterized in that a plurality of gantry supports are arranged on the machine table, a slide rail sequentially penetrates through each gantry support and is connected to the machine table, a first workbench and a second workbench are connected to the slide rail in a sliding mode, the first workbench and the second workbench are both connected with a workbench driving assembly, and pneumatic clamping fixtures are arranged on the first workbench and the second workbench; the rough milling mechanism is arranged on one of the gantry supports and used for roughly processing the workpiece on the first workbench, and the fine milling mechanism is arranged on the other gantry support and used for finely processing the workpiece on the second workbench; and a lifting mechanism and a material clamping mechanism for clamping a workpiece are arranged between the finish milling mechanism and the rough milling mechanism, and the lifting mechanism is connected with the material clamping mechanism and is used for driving the material clamping mechanism to move up and down.

2. Gantry machining center according to claim 1, characterized in that: the two groups of the workbench driving assemblies comprise a first motor, a first screw rod, a first nut and a connecting seat; the first motor and the connecting seat are connected to the machine table, one end of the first screw rod is connected with the output end of the first motor, the other end of the first screw rod is rotatably connected with the connecting seat, and the first nut is in threaded connection with the first screw rod; the first workbench and the second workbench are respectively connected to the first nuts of the two workbench driving assemblies.

3. Gantry machining center according to claim 1, characterized in that: the lifting mechanism comprises a lifting fixed plate, a lifting movable plate, a guide rod, a second screw rod, a second nut and a second motor; the lift fixed plate connect in on the gantry support, the one end of guide arm connect in on the board, the other end of guide arm connect in on the lift fixed plate, lift fly leaf sliding connection in on the guide arm, the second motor connect in on the lift fixed plate, the second lead screw connect in the output of second motor, second nut threaded connection in on the second lead screw, just the second nut with the lift fly leaf is connected, press from both sides the material mechanism and locate on the lift fly leaf.

4. Gantry machining center according to claim 3, characterized in that: the lifting fixing plate is provided with a through hole, a first mounting seat is arranged on the upper side of the through hole, a second mounting seat is arranged on one side of the first mounting seat, a second motor is connected onto the second mounting seat, a first transmission wheel is arranged on an output shaft of the second motor, one end of a second lead screw penetrates through the through hole and then is rotatably connected onto the first mounting seat, a second transmission wheel is arranged on the second lead screw, and the second transmission wheel is connected with the first transmission wheel through belt transmission.

5. Gantry machining center according to claim 1, characterized in that: the material clamping mechanism comprises a material clamping plate, a first gripper, a second gripper, a first rack, a second rack and a third motor; the first rack and the second rack are both connected to the material clamping plate in a sliding mode, the third motor is connected to the material clamping plate, an output shaft of the third motor is connected with a first gear, the first gear is meshed with the first rack and the second rack respectively, the first gripper is connected with the first rack, and the second gripper is connected with the second rack.

6. Gantry machining center according to claim 1, characterized in that: the rough milling mechanism comprises a first rough milling moving assembly, a second rough milling moving assembly and a rough milling machining assembly; the first rough milling moving assembly is connected to the gantry support in a sliding mode, the second rough milling moving assembly is connected to the first rough milling moving assembly in a sliding mode and intersected with the moving direction of the first rough milling moving assembly, and the rough milling processing assembly is connected to the second rough milling moving assembly and used for roughly processing a processed part.

7. Gantry machining center according to claim 1, characterized in that: the fine milling mechanism comprises a first fine milling moving assembly, a second fine milling moving assembly, a fine milling processing assembly and a tool changing assembly; the first finish milling moving assembly is connected to the gantry support in a sliding mode, the second finish milling moving assembly is connected to the first finish milling moving assembly in a sliding mode and intersected with the moving direction of the first finish milling moving assembly, and the finish milling machining assembly is connected to the second finish milling moving assembly and used for performing finish machining on a machined part; the tool changing assembly is connected to the gantry support and used for placing different tools into the finish milling assembly.

8. Gantry machining center according to claim 7, characterized in that: the tool changing assembly comprises a tool changing fixing table, a cutter head, a turnover clamping piece, a tool changing swing arm, a linear module, a fourth motor and a tool changing seat; the tool changing fixing table is connected to the gantry support, the cutter disc is rotatably connected to the tool changing fixing table, a plurality of tools are clamped on the cutter disc, the overturning clamping piece is rotatably arranged at the bottom of the tool changing fixing table, and a first tool clamping groove used for being clamped with the tools is formed in one end of the overturning clamping piece; the linear module is connected to the tool changing fixing table, a sliding block of the linear module is connected with the fourth motor and used for driving the fourth motor to move up and down, the tool changing swing arm is arranged below the turnover clamping piece, the middle of the tool changing swing arm is connected to an output shaft of the fourth motor, and second tool clamping grooves used for being clamped with tools are formed in two ends of the tool changing swing arm.

9. Gantry machining center according to claim 7, characterized in that: the first finish milling moving assembly comprises a fifth motor, a third screw rod, a third nut and a first finish milling moving table, the fifth motor is connected to the gantry support, the third screw rod is connected to an output shaft of the fifth motor, the third nut is in threaded connection with the third screw rod, and the first finish milling moving table is connected to the gantry support in a sliding mode and is connected with the third nut; the second fine milling moving assembly comprises a sixth motor, a fourth screw rod, a fourth nut and a second fine milling moving table, the sixth motor is connected to the first fine milling moving table, the fourth screw rod is connected to an output shaft of the sixth motor, the fourth nut is in threaded connection with the fourth screw rod, and the second fine milling moving table is in sliding connection with the first fine milling moving table and is connected with the fourth nut; and the fine milling processing assembly is connected to the second fine milling mobile station.

10. Gantry machining center according to claim 7, characterized in that: the finish milling machining assembly comprises a sixth motor and a cutter handle, the sixth motor is connected to the second finish milling moving assembly, the cutter handle is connected to the output end of the sixth motor, and one end, far away from the sixth motor, of the cutter handle is provided with a mounting groove for mounting the cutter.