Crown block type double-beam five-axis machining center

Abstract

The utility model discloses a crown block type double-beam five-axis machining center, and relates to the technical field of numerical control machine tools. The crown block type double-beam five-axis machining center comprises a workbench, a first stand column and a second stand column are arranged on the two sides of the workbench respectively, the top of the first stand column and the top of the second stand column are slidably connected with a first cross beam and a second cross beam which can move front and back along the X axis, and the first cross beam is parallel to the second cross beam; sliding saddles capable of moving left and right along the Y axis are connected to the first cross beam and the second cross beam in a sliding mode, a spindle box capable of moving up and down along the Z axis is connected to the middles of the sliding saddles in a sliding mode, and a double-pendulum milling head capable of rotating around the Z axis and the Y axis is installed on the spindle box. According to the crown block type double-beam five-axis machining center, double-five-axis operation machining can be achieved, meanwhile, a spacious machining space can be provided, and large complex parts such as aerospace parts can be better machined.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, and in particular to a crane-type double-beam five-axis machining center. Background Technology

[0002] A five-axis machining center is a machine tool with at least five coordinate axes (three linear axes and two rotary axes) that can simultaneously control these five axes for coordinated machining. Through the coordinated movement of the five coordinate axes, the cutting tool can machine the workpiece at any angle and position in space.

[0003] For example, Chinese patent document CN219901058U discloses a gantry-type five-axis machining center, including a worktable with side plates on both sides of the top of the worktable. A crossbeam for driving a milling cutter to move back and forth along the X-axis is slidably connected to the top of the side plates. A saddle for driving the milling cutter to move laterally along the Y-axis is slidably connected to the front of the crossbeam. A ram for driving the milling cutter to move up and down along the Z-axis is slidably connected to the saddle. However, this machine tool uses a gantry-type single-beam design structure, only possessing single five-axis machining capability. It provides a small machining space, which cannot adequately meet the machining needs of large and complex parts in aerospace and other applications, resulting in low machining efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a crane-type double-beam five-axis machining center that can realize double five-axis operation and machining, while providing a spacious machining space, and can better process large and complex parts for aerospace and other applications.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A crane-type double-beam five-axis machining center includes a worktable, with a first column and a second column on each side of the worktable. The top of the first column and the second column are slidably connected to a first crossbeam and a second crossbeam that can move back and forth along the X-axis. The first crossbeam and the second crossbeam are parallel. Saddles that can move left and right along the Y-axis are slidably connected to both the first column and the second crossbeam. A spindle box that can move up and down along the Z-axis is slidably connected to the middle of the saddle. A double-swing milling head that can rotate around the Z-axis and the Y-axis is mounted on the spindle box.

[0007] In some embodiments, two X-axis guide rails are installed on the top of the first column and the second column, and a rack arranged along the X-axis direction is installed between the two X-axis guide rails; a slide plate is installed at the bottom of both ends of the first beam and the second beam, and two sets of X-axis sliders are installed at the bottom of the slide plate and are respectively slidably connected to the two X-axis guide rails; a first drive device is installed on the front and rear sides of the slide plate, and the output shaft of the first drive device is connected to a backlash-eliminating gear. The first drive device is used to drive the backlash-eliminating gear to rotate, and the backlash-eliminating gear meshes with the rack.

[0008] In some embodiments, both the first column and the second column include a wall panel and a wall panel base supported at the bottom of the wall panel. The inner side of the wall panel base is provided with a connecting block that is fixedly connected to the workbench. The wall panel base is provided with a plurality of rectangular mounting holes spaced apart along the length direction. At least one mounting hole is provided with a tool magazine bracket, and the tool magazine bracket is provided with a tool magazine.

[0009] In some embodiments, the first and second crossbeams are box structures with openings at both the top and bottom. Y-axis guide rails are installed on the top and bottom sides of the first and second crossbeams. A second drive device and a Y-axis screw and nut pair arranged along the Y-axis direction are installed on the inner sidewalls of the first and second crossbeams. The Y-axis screw and nut pair is connected to the second drive device in a transmission manner. Several Y-axis sliders that are slidably connected to the Y-axis guide rails are installed on the top and bottom sides of the slide saddle. The outer sidewall of the slide saddle is also provided with a first nut seat that is fixedly connected to the nut of the Y-axis screw and nut pair.

[0010] In some embodiments, the slide saddle is a box structure with openings at both the top and bottom. Two sets of Z-axis sliders are installed on the left inner sidewall and the right inner sidewall of the slide saddle. The right inner sidewall of the slide saddle is also equipped with a third driving device and a Z-axis lead screw and nut pair arranged along the Z-axis direction. The Z-axis lead screw and nut pair is connected to the third driving device in a transmission manner. The spindle box is a box structure. The left outer sidewall and the right outer sidewall of the spindle box are provided with Z-axis guide rails adapted to the Z-axis sliders. The right outer sidewall of the spindle box is also provided with a second nut seat that is fixedly connected to the nut of the Z-axis lead screw and nut pair.

[0011] In some embodiments, the slide saddle includes a left slide saddle body and a right slide saddle body disposed opposite to each other, the left slide saddle body and the right slide saddle body being detachably connected to form a box structure.

[0012] In some embodiments, the first column, the second column, the first crossbeam, the second crossbeam, the slide saddle, and the spindle box are all provided with a number of weight-avoiding holes.

[0013] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0014] This utility model's overhead crane-type double-beam five-axis machining center enables flexible movement of milling cutters in five degrees of freedom, allowing for complete machining in a single operation. This reduces the number of workpiece clamping operations and positioning errors. Furthermore, through the parallel arrangement of the first and second crossbeams, it can achieve dual five-axis machining. At the same time, the overhead crane-type double-beam design provides a spacious machining area, making it better suited for machining large and complex parts in aerospace and other applications, resulting in high machining efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0016] Figure 2 This is a structural schematic diagram from another perspective of an embodiment of this application;

[0017] Figure 3 This is a schematic diagram of the connection structure between the first crossbeam and the first column in an embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the connection structure between the first crossbeam, the slide saddle, and the main spindle box in an embodiment of this application.

[0019] The following are the labels in the diagram: 1. Workbench; 2. First column; 3. Second column; 4. First crossbeam; 5. Second crossbeam; 6. Saddle; 61. Left saddle body; 62. Right saddle body; 7. Spindle box; 71. Z-axis guide rail; 8. Double swing milling head; 9. X-axis guide rail; 10. Rack; 20. Slide plate; 201. X-axis slider; 202. First drive device; 203. Backlash-eliminating gear; 30. Y-axis guide rail; 40. Y-axis lead screw and nut pair; 50. Y-axis slider; 60. Z-axis slider; 70. Z-axis lead screw and nut pair; 80. Weight avoidance hole; 100. Wall panel; 200. Wall panel base; 210. Mounting hole; 220. Connecting block. Detailed Implementation

[0020] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. 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 this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly 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 connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] like Figures 1-4As shown in the embodiment of this application, the overhead crane-type double-beam five-axis machining center includes a worktable 1. A first column 2 and a second column 3 are respectively provided on both sides of the worktable 1. A first crossbeam 4 and a second crossbeam 5 are slidably connected to the top of the first column 2 and the second column 3, for driving the milling cutter to move back and forth along the X-axis. The first crossbeam 4 and the second crossbeam 5 are arranged parallel to each other. A sliding saddle 6 for driving the milling cutter to move left and right along the Y-axis is slidably connected to both the first crossbeam 4 and the second crossbeam 5. A spindle box 7 for driving the milling cutter to move up and down along the Z-axis is slidably connected to the middle of the sliding saddle 6. A double-swing milling head 8, which can rotate around the Z-axis and Y-axis, is mounted on the spindle box 7. This application enables flexible movement of the milling cutter in five degrees of freedom, allowing for complete machining in one operation, reducing the number of workpiece clamping operations and positioning errors. Furthermore, through the parallel arrangement of the first crossbeam 4 and the second crossbeam 5, dual five-axis machining can be achieved, while providing a spacious machining space. This allows for better machining of large and complex parts for aerospace, shipbuilding, and other applications, resulting in high machining efficiency.

[0023] The first column 2 and the second column 3 are each equipped with two X-axis guide rails 9 at their tops, and a rack 10 arranged along the X-axis direction is installed between the two X-axis guide rails 9. Slide plates 20 are installed at the bottom of both ends of the first crossbeam 4 and the second crossbeam 5. Two sets of X-axis sliders 201, which are slidably connected to the two X-axis guide rails 9, are installed at the bottom of the slide plates 20. First drive devices 202 are installed on the front and rear sides of the slide plates 20. The first drive device 202 is a geared motor, and its output shaft is connected to a backlash-eliminating gear 203. The first drive device 202 drives the backlash-eliminating gear 203 to rotate, and the backlash-eliminating gear 203 meshes with the rack 10. The first crossbeam 4, the second crossbeam 5, and the first column 2 and the second column 3 are connected by a gear and rack transmission method using the rack 10. The gears are backlash-eliminating gears 203, which, through special design (such as a double gear structure or elastic element), can eliminate the backlash in gear meshing, ensuring transmission accuracy and smooth operation, enabling the first crossbeam 4 and the second crossbeam 5 to move quickly and achieve high processing efficiency.

[0024] Both the first column 2 and the second column 3 include a wall panel 100 and a wall panel base 200 supported at the bottom of the wall panel 100. The inner side of the wall panel base 200 is provided with a connecting block 220 that is fixedly connected to the worktable 1. The wall panel base 200 has several rectangular mounting holes 210 spaced along its length. At least one mounting hole 210 houses a tool magazine bracket, which in turn houses a tool magazine. By providing several rectangular mounting holes 210 on the wall panel base 200, multiple tool magazines can be installed. Each tool magazine can store different types of tools, enabling automatic tool changing and meeting the needs of complex parts machining.

[0025] The first crossbeam 4 and the second crossbeam 5 are box-shaped structures with openings at both the top and bottom. Y-axis guide rails 30 are installed on the top and bottom sides of the first and second crossbeams 4 and 5. A second drive device and a Y-axis lead screw and nut assembly 40 arranged along the Y-axis direction are installed on the inner walls of the first and second crossbeams 4 and 5. The second drive device is a motor, and the Y-axis lead screw and nut assembly 40 is connected to the second drive device for transmission. Several Y-axis sliders 50, which are slidably connected to the Y-axis guide rails 30, are installed on the top and bottom sides of the sliding saddle 6. The outer wall of the sliding saddle 6 is also provided with a first nut seat that is fixedly connected to the nut of the Y-axis lead screw and nut assembly 40. The sliding saddle 6 and the first crossbeam 4 or the second crossbeam 5 form a box-within-a-box structure, greatly improving rigidity and stability, and ensuring smooth operation of the sliding saddle 6, the first crossbeam 4, and the second crossbeam 5.

[0026] Furthermore, the slide saddle 6 is a box structure with openings at both the top and bottom. Two sets of Z-axis sliders 60 are installed on the left and right inner walls of the slide saddle 6. A third drive device and a Z-axis lead screw and nut assembly 70 arranged along the Z-axis direction are also installed on the right inner wall of the slide saddle 6. The third drive device is a motor, and the Z-axis lead screw and nut assembly 70 is connected to the third drive device for transmission. The spindle box 7 is a box structure. Z-axis guide rails 71 adapted to the Z-axis sliders 60 are provided on the left and right outer walls of the spindle box 7. A second nut seat is also provided on the right outer wall of the spindle box 7, which is fixedly connected to the nut of the Z-axis lead screw and nut assembly 70. The spindle box 7 and the slide saddle 6 form a box-within-a-box structure, greatly improving rigidity and stability, and ensuring smooth operation of the spindle box 7 and the slide saddle 6.

[0027] Furthermore, the slide saddle 6 includes a left slide saddle body 61 and a right slide saddle body 62 arranged opposite to each other. The left slide saddle body 61 and the right slide saddle body 62 are detachably connected to form a box structure. Designing the slide saddle 6 as a left slide saddle body 61 and a right slide saddle body 62 can reduce the assembly difficulty of the spindle box 7 and the slide saddle 6, and also reduce the manufacturing difficulty of the slide saddle 6.

[0028] The first column 2, the second column 3, the first crossbeam 4, the second crossbeam 5, the slide saddle 6, and the spindle box 7 are all provided with several weight-avoiding holes 80. The weight-avoiding holes 80 can reduce material costs and lighten the weight of the first crossbeam 4, the second crossbeam 5, the slide saddle 6, and the spindle box 7, making them lighter and thus reducing the burden on the first drive device 202, the second drive device, and the third drive device.

[0029] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A crane-type double-beam five-axis machining center, characterized in that: The device includes a worktable, on which a first column and a second column are respectively provided on both sides. The top of the first column and the second column are slidably connected to a first crossbeam and a second crossbeam that can move back and forth along the X-axis. The first crossbeam and the second crossbeam are parallel. The first crossbeam and the second crossbeam are slidably connected to a saddle that can move left and right along the Y-axis. The middle of the saddle is slidably connected to a spindle box that can move up and down along the Z-axis. The spindle box is equipped with a double swing milling head that can rotate around the Z-axis and the Y-axis.

2. The overhead crane type double-beam five-axis machining center according to claim 1, characterized in that: The first and second columns are each equipped with two X-axis guide rails at their tops, and a rack is installed between the two X-axis guide rails along the X-axis direction. Slide plates are installed at the bottom of both ends of the first and second crossbeams. Two sets of X-axis sliders are installed at the bottom of the slide plates and are respectively slidably connected to the two X-axis guide rails. First drive devices are installed on the front and rear sides of the slide plates. The output shaft of the first drive device is connected to a backlash-eliminating gear. The first drive device is used to drive the backlash-eliminating gear to rotate, and the backlash-eliminating gear meshes with the rack.

3. The overhead crane type double-beam five-axis machining center according to claim 1, characterized in that: Both the first and second columns include a wall panel and a wall panel base supported at the bottom of the wall panel. The inner side of the wall panel base is provided with a connecting block that is fixedly connected to the workbench. The wall panel base is provided with a plurality of rectangular mounting holes spaced apart along the length direction. At least one of the mounting holes is equipped with a tool magazine bracket, and the tool magazine bracket is provided with a tool magazine.

4. The overhead crane type double-beam five-axis machining center according to claim 1, characterized in that: The first and second crossbeams are box structures with openings at both the top and bottom. Y-axis guide rails are installed on the top and bottom sides of the first and second crossbeams. A second driving device and a Y-axis screw and nut pair arranged along the Y-axis direction are installed on the inner sidewalls of the first and second crossbeams. The Y-axis screw and nut pair is connected to the second driving device. Several Y-axis sliders that are slidably connected to the Y-axis guide rails are installed on the top and bottom sides of the slide saddle. The outer sidewall of the slide saddle is also provided with a first nut seat that is fixedly connected to the nut of the Y-axis screw and nut pair.

5. The overhead crane type double-beam five-axis machining center according to claim 4, characterized in that: The slide saddle is a box structure with openings at both the top and bottom. Two sets of Z-axis sliders are installed on the left and right inner walls of the slide saddle. The right inner wall of the slide saddle is also equipped with a third drive device and a Z-axis lead screw and nut pair arranged along the Z-axis direction. The Z-axis lead screw and nut pair is connected to the third drive device. The spindle box is a box structure. The left and right outer walls of the spindle box are provided with Z-axis guide rails adapted to the Z-axis sliders. The right outer wall of the spindle box is also provided with a second nut seat that is fixedly connected to the nut of the Z-axis lead screw and nut pair.

6. The overhead crane type double-beam five-axis machining center according to claim 5, characterized in that: The slide saddle includes a left slide saddle body and a right slide saddle body arranged opposite each other, and the left slide saddle body and the right slide saddle body are detachably connected to form a box structure.

7. The overhead crane type double-beam five-axis machining center according to claim 1, characterized in that: The first column, the second column, the first crossbeam, the second crossbeam, the slide saddle, and the spindle box are all provided with several weight-avoiding holes.

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