Numerical control gantry milling machine for machining

Abstract

The utility model belongs to the technical field of machining equipment, especially, relate to a numerical control planer -type milling machine for machining, including frame, workstation mechanism, clamping mechanism, portal frame, portal moving mechanism, portal lifting mechanism and drilling mechanism. The workstation mechanism includes workstation servo motor, workstation screw, workstation nut, workstation slide rail, workstation sliding block and frock platform. The clamping mechanism includes clamping base plate and clamping assembly. The numerical control planer -type milling machine for machining provided by the application adopts three clamping assemblies which are evenly arranged in a ring shape, clamps workpieces from multiple directions, can provide more uniform and stable clamping force, ensures the position accuracy of workpieces during the machining process, because the workpiece clamping is stable, the relative position between the tool and the workpiece can be kept accurate, thereby improving the machining accuracy, the stable machining process reduces the abnormal wear of the tool, prolongs the service life of the tool, and reduces the tool replacement cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical processing equipment, and in particular relates to a CNC gantry milling machine for mechanical processing. Background Technology

[0002] In the machining industry, milling machines are commonly used processing equipment for various machining operations such as milling, drilling, and tapping. Traditional milling machine fixtures typically only clamp the workpiece at one or two positions, which has significant shortcomings. During workpiece machining, due to factors such as cutting forces and vibrations, workpieces clamped in only a few positions are prone to misalignment. Once the workpiece is misaligned, the relative position between the tool and the workpiece changes, affecting machining accuracy and resulting in larger dimensional errors in the machined workpiece, failing to meet high-precision machining requirements. Furthermore, workpiece misalignment can also lead to accelerated tool wear, increasing machining costs and reducing production efficiency. Therefore, how to improve the fixture structure of milling machines and enhance the stability of workpiece clamping has become a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0003] The purpose of this utility model is to provide a CNC gantry milling machine for machining, which aims to solve the technical problems in the prior art such as unstable clamping of fixtures, easy workpiece misalignment, low machining accuracy, accelerated tool wear, increased machining costs, and reduced production efficiency.

[0004] To achieve the above objectives, the present invention provides a CNC gantry milling machine for machining, comprising a frame, a worktable mechanism, a clamping mechanism, a gantry frame, a gantry moving mechanism, a gantry lifting mechanism, and a drilling and tapping mechanism. The worktable mechanism is disposed on the frame, the clamping mechanism is connected to the worktable mechanism, the gantry frame is connected to the frame, the gantry moving mechanism is disposed on the gantry lifting mechanism, and the drilling and tapping mechanism is disposed on the gantry lifting mechanism.

[0005] The worktable mechanism includes a worktable servo motor, a worktable lead screw, a worktable nut, a worktable slide rail, a worktable slider, and a fixture table. The worktable servo motor is connected to the frame and is connected to the worktable lead screw. The worktable nut is threadedly connected to the worktable lead screw. The worktable slide rail is connected to the frame. The worktable slider is slidably connected to the worktable slide rail. The fixture table is connected to the worktable nut and the worktable slider respectively.

[0006] The clamping mechanism includes a clamping base plate and clamping assemblies. Three clamping assemblies are provided and are evenly arranged in a ring on the clamping base plate. Each clamping assembly includes a cylinder seat, a clamping cylinder, a piston rod, a rotating chuck, and a rotating fixed seat. The clamping base plate is connected to the tooling table. The cylinder seat is connected to the clamping base plate. The clamping cylinder is connected to the cylinder seat. The piston rod is movably connected to the clamping cylinder. One end of the rotating chuck is rotatably connected to the piston rod, and the other end is rotatably connected to the rotating fixed seat. The rotating fixed seat is connected to the clamping base plate.

[0007] As an optional solution of this utility model, there are two worktable slide rails, which are arranged in parallel and opposite to each other, and three worktable sliders are slidably connected on each worktable slide rail.

[0008] As an optional solution of this utility model, the worktable mechanism further includes a worktable bearing, which is fixedly connected to one end of the worktable lead screw and fixedly connected to the frame.

[0009] As an optional embodiment of this utility model, the gantry moving mechanism includes a gantry moving servo motor, a gantry moving lead screw, a gantry moving nut, a gantry moving bearing, a gantry moving slide rail, and a gantry moving slider. The gantry moving servo motor is fixedly connected to the gantry frame. One end of the gantry moving lead screw is fixedly connected to the gantry moving servo motor, and the other end is fixedly connected to the gantry moving bearing. The gantry moving nut is threadedly connected to the gantry moving lead screw and connected to the gantry lifting mechanism. The gantry moving bearing is fixedly connected to the gantry frame. The gantry moving slide rail is fixedly connected to the gantry frame. The gantry moving slider is slidably connected to the gantry moving slide rail and connected to the gantry lifting mechanism.

[0010] As an optional embodiment of this utility model, the gantry lifting mechanism includes a gantry lifting base, a gantry lifting servo motor, a gantry lifting screw, a gantry lifting nut, a gantry lifting bearing, a gantry lifting slide rail, and a gantry lifting slider. The gantry lifting base is fixedly connected to the gantry sliding slider. The gantry lifting servo motor is fixedly connected to the gantry lifting base. The gantry lifting screw is fixedly connected to the gantry lifting servo motor and is also fixedly connected to the gantry lifting bearing. The gantry lifting nut is threadedly connected to the gantry lifting screw and is connected to the drilling and tapping mechanism. The gantry lifting bearing and the gantry lifting slide rail are both fixedly connected to the gantry lifting base. The gantry lifting slider is slidably connected to the gantry lifting slide rail and is connected to the drilling and tapping mechanism.

[0011] As an optional solution of this utility model, the drilling and tapping mechanism includes a drilling and tapping seat, a drilling and tapping motor, and a drilling and tapping head. The drilling and tapping seat is fixedly connected to the gantry lifting nut and the gantry lifting slider, respectively. The drilling and tapping motor is fixedly connected to the drilling and tapping seat, and the drilling and tapping head is fixedly connected to the drilling and tapping motor and is disposed above the worktable mechanism.

[0012] As an optional solution of this utility model, the drill bit includes a drill bit body and a drill bit, wherein the drill bit body is fixedly connected to the drill motor, and the drill bit is fixedly connected to the drill bit body.

[0013] The above-mentioned technical solutions of the CNC gantry milling machine for machining provided in this embodiment of the utility model have at least one of the following technical effects:

[0014] The CNC gantry milling machine for machining provided in this application employs three clamping components arranged in a ring to clamp the workpiece from multiple directions. Compared to traditional fixtures that only clamp one or two positions, this provides a more uniform and stable clamping force, effectively preventing workpiece displacement due to cutting forces, vibrations, and other factors during machining, thus ensuring the workpiece's positional accuracy. Because the workpiece is stably clamped and less prone to displacement, the relative position between the tool and the workpiece remains accurate, thereby improving machining accuracy, reducing dimensional errors in the machined workpiece, and meeting high-precision machining requirements. The stable machining process reduces abnormal tool wear, extends tool life, and lowers tool replacement costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A perspective view of a CNC gantry milling machine for machining provided in an embodiment of this utility model.

[0017] Figure 2 A perspective view of the worktable mechanism of a CNC gantry milling machine for machining provided in an embodiment of this utility model.

[0018] Figure 3 A perspective view of the worktable mechanism, gantry moving mechanism, gantry lifting mechanism, and drilling and tapping mechanism of a CNC gantry milling machine for machining provided in this embodiment of the utility model.

[0019] Figure 4A perspective view of the drill and tapping head of a CNC gantry milling machine for machining provided in an embodiment of this utility model.

[0020] Figure 5 A perspective view of the clamping mechanism of a CNC gantry milling machine for machining provided in an embodiment of this utility model.

[0021] The following are the labeling elements in the figure:

[0022] 1. Frame; 2. Workbench mechanism; 3. Gantry frame; 4. Clamping mechanism; 5. Gantry lifting mechanism; 6. Drilling and tapping mechanism; 7. Gantry moving mechanism;

[0023] 21. Worktable servo motor; 22. Worktable lead screw; 23. Worktable nut; 24. Worktable slide rail; 25. Worktable slider; 26. Tooling table; 27. Worktable bearing;

[0024] 41. Clamping base plate; 42. Cylinder seat; 43. Clamping cylinder; 44. Piston rod; 45. Rotating chuck; 46. Rotating fixed base;

[0025] 51. Gantry lifting platform; 52. Gantry lifting servo motor; 53. Gantry lifting lead screw; 55. Gantry lifting bearing; 56. Gantry lifting slide rail; 57. Gantry lifting slider;

[0026] 61. Drill tap holder; 62. Drill tap motor; 63. Drill tap head;

[0027] 71. Gantry moving servo motor; 72. Gantry moving lead screw; 74. Gantry moving bearing; 75. Gantry moving slide rail; 76. Gantry moving slider;

[0028] 631. Drill bit body; 632. Drill bit. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0033] In one embodiment of this utility model, such as Figures 1-5 As shown, a CNC gantry milling machine for machining is provided, including a frame 1, a worktable mechanism 2, a clamping mechanism 4, a gantry frame 3, a gantry moving mechanism 7, a gantry lifting mechanism 5, and a drilling and tapping mechanism 6. The worktable mechanism 2 is mounted on the frame 1 and is used to support and move the workpiece; the clamping mechanism 4 is connected to the worktable mechanism 2 to achieve stable clamping of the workpiece; the gantry frame 3 is connected to the frame 1 and provides support for the gantry moving mechanism 7 and the gantry lifting mechanism 5; the gantry moving mechanism 7 is mounted on the gantry lifting mechanism 5 and can drive the gantry lifting mechanism 5 to move horizontally; the gantry lifting mechanism 5 is mounted on the gantry moving mechanism 7 and is used to drive the drilling and tapping mechanism 6 to move vertically; the drilling and tapping mechanism 6 is mounted on the gantry lifting mechanism 5 and performs drilling and tapping operations on the workpiece.

[0034] Specifically, the worktable mechanism 2 includes a worktable servo motor 21, a worktable lead screw 22, a worktable nut 23, a worktable slide rail 24, a worktable slider 25, and a tooling table 26. The worktable servo motor 21 is connected to the frame 1 and to the worktable lead screw 22. The rotation of the worktable servo motor 21 drives the worktable lead screw 22 to rotate. The worktable nut 23 is threadedly connected to the worktable lead screw 22. When the worktable lead screw 22 rotates, the worktable nut 23 moves along the lead screw axis. The worktable slide rail 24 is connected to the frame 1. Two worktable slide rails 24 are arranged in parallel opposite directions. Three worktable sliders 25 are slidably connected on each worktable slide rail 24 to provide guidance and support for the movement of the tooling table 26. The tooling table 26 is connected to the worktable nut 23 and the worktable sliders 25 respectively. Driven by the worktable nut 23 and the worktable sliders 25, the tooling table 26 moves in the horizontal direction, thereby moving the workpiece to the appropriate processing position. In addition, the worktable mechanism 2 also includes a worktable bearing 27, which is fixedly connected to one end of the worktable lead screw 22 and to the frame 1. It is used to support the worktable lead screw 22, reduce friction and shaking when the lead screw rotates, and improve the stability of the worktable mechanism 2.

[0035] The clamping mechanism 4 includes a clamping base plate 41 and clamping assemblies. Three clamping assemblies are arranged in a ring on the clamping base plate 41. Each clamping assembly includes a cylinder seat 42, a clamping cylinder 43, a piston rod 44, a rotating chuck 45, and a rotating fixed seat 46. The clamping base plate 41 is fixedly connected to the tooling table 26, the cylinder seat 42 is fixedly connected to the clamping base plate 41, the clamping cylinder 43 is fixedly connected to the cylinder seat 42, and the piston rod 44 is movably connected to the clamping cylinder 43. The piston rod 44 moves by extending and retracting the clamping cylinder 43. One end of the rotating chuck 45 is rotatably connected to the piston rod 44, and the other end is rotatably connected to the rotating fixed seat 46, which is fixedly connected to the clamping base plate 41. The three clamping assemblies clamp the workpiece from multiple directions, providing a more stable clamping force compared to traditional clamps that only clamp one or two positions, effectively preventing workpiece misalignment during processing.

[0036] The gantry moving mechanism 7 includes a gantry moving servo motor 71, a gantry moving lead screw 72, a gantry moving nut, a gantry moving bearing 74, a gantry moving slide rail 75, and a gantry moving slider 76. The gantry moving servo motor 71 is fixedly connected to the gantry frame 3. One end of the gantry moving lead screw 72 is fixedly connected to the gantry moving servo motor 71, and the other end is fixedly connected to the gantry moving bearing 74. The gantry moving nut is threadedly connected to the gantry moving lead screw 72 and connected to the gantry lifting mechanism 5. The gantry moving bearing 74 is fixedly connected to the gantry frame 3, the gantry moving slide rail 75 is fixedly connected to the gantry frame 3, and the gantry moving slider 76 is slidably connected to the gantry moving slide rail 75 and connected to the gantry lifting mechanism 5. Driven by the gantry moving servo motor 71, the gantry moving lead screw 72 rotates, causing the gantry moving nut and the gantry lifting mechanism 5 to move horizontally along the gantry moving slide rail 75, thereby adjusting the horizontal position of the drilling and tapping mechanism 6.

[0037] The gantry lifting mechanism 5 includes a gantry lifting base 51, a gantry lifting servo motor 52, a gantry lifting lead screw 53, a gantry lifting nut, a gantry lifting bearing 55, a gantry lifting slide rail 56, and a gantry lifting slider 57. The gantry lifting base 51 is fixedly connected to the gantry moving slider 76. The gantry lifting servo motor 52 is fixedly connected to the gantry lifting base 51. The gantry lifting lead screw 53 is fixedly connected to the gantry lifting servo motor 52 and is also fixedly connected to the gantry lifting bearing 55. The gantry lifting nut is threadedly connected to the gantry lifting lead screw 53 and is connected to the drilling and tapping mechanism 6. The gantry lifting bearing 55 and the gantry lifting slide rail 56 are both fixedly connected to the gantry lifting base 51. The gantry lifting slider 57 is slidably connected to the gantry lifting slide rail 56 and is connected to the drilling and tapping mechanism 6. Driven by the gantry lifting servo motor 52, the gantry lifting screw 53 rotates, causing the gantry lifting nut and the drilling and tapping mechanism 6 to move vertically along the gantry lifting slide rail 56, thereby adjusting the position of the drilling and tapping mechanism 6 in the vertical direction to adapt to the processing requirements of workpieces of different heights.

[0038] The drilling and tapping mechanism 6 includes a drill and tap base 61, a drill and tap motor 62, and a drill and tap head 63. The drill and tap base 61 is fixedly connected to the gantry lifting nut and the gantry lifting slider 57, respectively. The drill and tap motor 62 is fixedly connected to the drill and tap base 61, and the drill and tap head 63 is fixedly connected to the drill and tap motor 62 and is positioned above the worktable mechanism 2. The drill and tap motor 62 drives the drill and tap head 63 to rotate, performing drilling and tapping operations on the workpiece. The drill and tap head 63 includes a drill and tap head body 631 and a drill and tap cutter 632. The drill and tap head body 631 is fixedly connected to the drill and tap motor 62, and the drill and tap cutter 632 is fixedly connected to the drill and tap head body 631.

[0039] The work process is as follows:

[0040] Workpiece clamping: Place the workpiece to be processed on the fixture table 26, start the clamping cylinder 43 of the clamping mechanism 4, and push the rotating chuck 45 through the piston rod 44. The three rotating chucks 45 clamp the workpiece from different directions and fix the workpiece firmly on the fixture table 26.

[0041] Workpiece positioning: According to the processing requirements, the worktable servo motor 21 is started, which drives the worktable lead screw 22 to rotate, causing the worktable nut 23 and the tooling table 26 to move along the worktable slide rail 24, moving the workpiece to the appropriate processing position. At the same time, according to the processing requirements of the workpiece in the horizontal direction, the gantry moving servo motor 71 is started, which drives the gantry moving lead screw 72 to rotate, causing the gantry moving nut and the gantry lifting mechanism 5 to move horizontally along the gantry moving slide rail 75, adjusting the horizontal position of the drilling and tapping mechanism 6 so that the drill and tap head 63 is aligned with the part of the workpiece to be processed in the horizontal direction.

[0042] Machining Operation: Based on the workpiece's machining height, the gantry lifting servo motor 52 is activated. The gantry lifting servo motor 52 drives the gantry lifting screw 53 to rotate, causing the gantry lifting nut and drilling / tapping mechanism 6 to move vertically along the gantry lifting slide rail 56, lowering the drill / tapping head 63 to the appropriate machining height. Then, the drilling / tapping motor 62 is activated, driving the drill / tapping head 63 to rotate, performing drilling or tapping on the workpiece. During machining, the clamping mechanism 4 maintains stable clamping of the workpiece, ensuring that the workpiece does not shift.

[0043] Processing Completion: After the workpiece is processed, first stop the drilling and tapping motor 62 to stop the drill and tapping head 63 from rotating. Then start the gantry lifting servo motor 52 to raise the drilling and tapping mechanism 6 to a safe height, and then start the gantry moving servo motor 71 to move the drilling and tapping mechanism 6 to a suitable position. Finally, start the clamping cylinder 43 to release the rotating chuck 45 and remove the processed workpiece from the tooling table 26, completing one processing operation.

[0044] The CNC gantry milling machine for machining provided in this application employs three clamping components arranged in a ring to clamp the workpiece from multiple directions. Compared to traditional fixtures that only clamp one or two positions, this provides a more uniform and stable clamping force, effectively preventing workpiece displacement due to cutting forces, vibrations, and other factors during machining, thus ensuring the workpiece's positional accuracy. Because the workpiece is stably clamped and less prone to displacement, the relative position between the tool and the workpiece remains accurate, thereby improving machining accuracy, reducing dimensional errors in the machined workpiece, and meeting high-precision machining requirements. The stable machining process reduces abnormal tool wear, extends tool life, and lowers tool replacement costs.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A CNC gantry milling machine for machining, characterized in that, It includes a frame, a worktable mechanism, a clamping mechanism, a gantry frame, a gantry moving mechanism, a gantry lifting mechanism, and a drilling and tapping mechanism. The worktable mechanism is disposed on the frame, the clamping mechanism is connected to the worktable mechanism, the gantry frame is connected to the frame, the gantry moving mechanism is disposed on the gantry lifting mechanism, and the drilling and tapping mechanism is disposed on the gantry lifting mechanism. The worktable mechanism includes a worktable servo motor, a worktable lead screw, a worktable nut, a worktable slide rail, a worktable slider, and a fixture table. The worktable servo motor is connected to the frame and is connected to the worktable lead screw. The worktable nut is threadedly connected to the worktable lead screw. The worktable slide rail is connected to the frame. The worktable slider is slidably connected to the worktable slide rail. The fixture table is connected to the worktable nut and the worktable slider respectively. The clamping mechanism includes a clamping base plate and clamping assemblies. Three clamping assemblies are provided and are evenly arranged in a ring on the clamping base plate. Each clamping assembly includes a cylinder seat, a clamping cylinder, a piston rod, a rotating chuck, and a rotating fixed seat. The clamping base plate is connected to the tooling table. The cylinder seat is connected to the clamping base plate. The clamping cylinder is connected to the cylinder seat. The piston rod is movably connected to the clamping cylinder. One end of the rotating chuck is rotatably connected to the piston rod, and the other end is rotatably connected to the rotating fixed seat. The rotating fixed seat is connected to the clamping base plate.

2. The CNC gantry milling machine for machining according to claim 1, characterized in that, The worktable slide rails are provided in two parallel and opposite directions, and three worktable sliders are slidably connected on each worktable slide rail.

3. The CNC gantry milling machine for machining according to claim 1, characterized in that, The worktable mechanism also includes a worktable bearing, which is fixedly connected to one end of the worktable lead screw and to the frame.

4. A CNC gantry milling machine for machining according to claim 1, characterized in that, The gantry moving mechanism includes a gantry moving servo motor, a gantry moving lead screw, a gantry moving nut, a gantry moving bearing, a gantry moving slide rail, and a gantry moving slider. The gantry moving servo motor is fixedly connected to the gantry frame. One end of the gantry moving lead screw is fixedly connected to the gantry moving servo motor, and the other end is fixedly connected to the gantry moving bearing. The gantry moving nut is threadedly connected to the gantry moving lead screw and connected to the gantry lifting mechanism. The gantry moving bearing is fixedly connected to the gantry frame. The gantry moving slide rail is fixedly connected to the gantry frame. The gantry moving slider is slidably connected to the gantry moving slide rail and connected to the gantry lifting mechanism.

5. A CNC gantry milling machine for machining according to claim 4, characterized in that, The gantry lifting mechanism includes a gantry lifting base, a gantry lifting servo motor, a gantry lifting screw, a gantry lifting nut, a gantry lifting bearing, a gantry lifting slide rail, and a gantry lifting slider. The gantry lifting base is fixedly connected to the gantry sliding slider. The gantry lifting servo motor is fixedly connected to the gantry lifting base. The gantry lifting screw is fixedly connected to the gantry lifting servo motor and is also fixedly connected to the gantry lifting bearing. The gantry lifting nut is threadedly connected to the gantry lifting screw and is connected to the drilling and tapping mechanism. The gantry lifting bearing and the gantry lifting slide rail are both fixedly connected to the gantry lifting base. The gantry lifting slider is slidably connected to the gantry lifting slide rail and is connected to the drilling and tapping mechanism.

6. A CNC gantry milling machine for machining according to claim 5, characterized in that, The drilling and tapping mechanism includes a drilling and tapping base, a drilling and tapping motor, and a drilling and tapping head. The drilling and tapping base is fixedly connected to the gantry lifting nut and the gantry lifting slider, respectively. The drilling and tapping motor is fixedly connected to the drilling and tapping base, and the drilling and tapping head is fixedly connected to the drilling and tapping motor and is disposed above the worktable mechanism.

7. A CNC gantry milling machine for machining according to claim 6, characterized in that, The drill bit includes a drill bit body and a drill bit cutter. The drill bit body is fixedly connected to the drill motor, and the drill bit cutter is fixedly connected to the drill bit body.

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