Crane frame-in-frame cradle five-axis vertical machining center

Abstract

The invention discloses a crown block frame-in-frame cradle five-axis vertical machining center which comprises a lathe bed, two wall type stand columns are installed on the lathe bed, a frame-in-frame truss is installed on the two wall type stand columns through Y-axis guide rail driving assemblies, and frame part holes are formed in the frame-in-frame truss. A spindle ram on the vertical machining center is mounted on a saddle, the saddle moves on a frame-in-frame truss along the X axis through an X-axis guide rail driving assembly, the spindle ram moves up and down through an arranged Z-axis lifting assembly, and the frame-in-frame truss moves along the Y axis through an arranged Y-axis guide rail driving assembly. The main shaft ram of a frame-in-frame truss structure is additionally arranged, through the double-guide-rail-pair supporting frame-in-frame type structure of the main shaft ram, a main shaft of a traditional single-cantilever single-guide-rail-pair supporting structure is avoided, the rigidity and stress of the main shaft are greatly improved, and the precision and stability of a machine tool are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of machining centers, in particular to a 5-axis vertical machining center with a crane frame and a frame cradle. Background Art

[0002] The machining center is a highly automated multifunctional CNC machine tool with a tool magazine and automatic tool changing device. The CNC milling machine is an automatic processing equipment developed on the basis of the general milling machine. The processing technology of the two is basically the same, and the structure is somewhat similar. The CNC milling machine is divided into two categories: without a tool magazine and with a tool magazine. Among them, the CNC milling machine with a tool magazine is also called a machining center.

[0003] In the existing vertical machining centers, the spindle is installed on the column or on the crane structure, which is a cantilever structure. The deformation due to its own weight, deformation due to machining force, and deformation due to temperature rise are all relatively large. This structural defect makes the machine tool unable to complete the machining of parts with relatively high precision. At the same time, when the machining center is processing the equipment, the equipment at the bottom is placed in a horizontal position. When the placement position and orientation need to be adjusted, it is inconvenient. For this reason, a 5-axis vertical machining center with a crane frame-in-frame cradle is proposed. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a 5-axis vertical machining center with a crane frame, an inner frame and a cradle, which is used to solve the problem that in the existing vertical machining centers, the spindle, whether installed on a column or a crane structure, is a cantilever structure, and deformation due to deadweight, deformation due to machining force, and deformation due to temperature rise are all relatively large. This structural defect makes it impossible for the machine tool to complete the machining of parts with relatively high precision. At the same time, when the machining center is processing the equipment, the equipment at the bottom is placed in a horizontal position, which is inconvenient when the placement position and orientation need to be adjusted.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A 5-axis vertical machining center with a crane frame-in-frame cradle includes a bed, two wall columns are installed on the bed, a frame-in-frame frame is installed on the two wall columns through a Y-axis guide rail driving assembly, a frame hole is opened on the frame, a saddle is movably installed on the frame hole, the saddle is connected to the frame-in-frame frame through an X-axis guide rail driving assembly, and the saddle is connected through a Z-axis lifting assembly, a processing table is installed above the bed, the processing table is located between the two wall columns, an A-axis assembly is provided on the wall column, the A-axis assembly is connected to the processing table, and a rotating disk is installed on the processing table through a C-axis assembly.

[0007] Preferably, the A-axis assembly includes a servo motor fixedly mounted on one side of a wall column, two cradle frames are fixedly mounted on the top side of the processing table, the output end of the servo motor is connected to a rotating shaft, one end of the rotating shaft rotates through the wall column and is fixedly mounted on one side of the cradle frame.

[0008] Preferably, a mounting hole is opened on one side of the wall column, a bearing is installed in the mounting hole, and one end of the rotating shaft rotates through the bearing.

[0009] Preferably, the C-axis assembly includes a bottom groove opened on the bottom side of the processing table, and a DD direct drive motor is fixedly installed on the bottom groove. The output end of the DD direct drive motor extends to the top of the processing table and is fixedly connected to the bottom side of the rotating disk. A lower groove is opened on the top side of the bed, and the lower groove is located below the processing table.

[0010] Preferably, the Y-axis guide rail drive assembly includes a Y-axis servo motor fixedly mounted on the top side of the wall column, a first ball screw assembly is fixedly mounted on the output end of the Y-axis servo motor, and one side of the first ball screw assembly is fixedly mounted on one side of the frame-in-frame rack.

[0011] Preferably, a linear guide assembly is fixedly installed on the top side of the wall column, a linear guide slider is installed on the bottom side of the frame-in-frame rack, and the linear guide slider is slidably installed on the linear guide assembly.

[0012] Preferably, the X-axis guide rail drive assembly includes an X-axis servo motor fixedly mounted on the top side of the frame-in-frame rack, the output end of the X-axis servo motor is connected to a second ball screw assembly, and one side of the second ball screw assembly is fixedly mounted on one side of the saddle.

[0013] Preferably, two movable slide rails are fixedly installed on the top side of the frame-in-frame rack, and two groups of movable sliders are installed on the bottom side of the saddle, and the two groups of movable sliders are slidably installed on the two groups of movable slide rails respectively.

[0014] Preferably, the Z-axis lifting assembly includes a lifting hole formed on the saddle, a spindle slide is movably mounted on the lifting hole, a Z-axis servo motor is fixedly mounted on one side of the spindle slide, a third ball screw assembly is fixedly mounted on the output end of the Z-axis servo motor, the bottom side of the third ball screw assembly is fixedly mounted on the top side of the saddle, a sliding groove is formed on the inner wall of the lifting hole, a sliding block is fixedly mounted on the outer side of the spindle slide, and the sliding block is slidably mounted in the sliding groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, the overhead crane frame-frame cradle 5-axis vertical machining center, the spindle slide on the vertical machining center is installed on the saddle, the saddle is moved along the X-axis on the frame-frame rack through the X-axis guide drive assembly, the Z-axis lifting assembly is set to realize the up and down movement of the spindle slide, the Y-axis guide drive assembly is set to realize the movement of the frame-frame rack along the Y-axis, and the spindle slide of the frame-frame rack structure is added. Through this double-guide sub-support frame-frame structure for the spindle slide, the spindle of the traditional single-cantilever single-guide sub-support structure is avoided, the rigidity and force of the spindle are greatly improved, and the precision and stability of the machine tool are greatly improved;

[0017] 2. In the present invention, an A-axis assembly is provided, and the operation of the servo motor on the A-axis assembly can drive the rotating shaft to rotate, thereby driving the processing table to rotate under the action of the cradle, thereby realizing the orientation adjustment of the equipment placed on the processing table, and a C-axis assembly is provided, and the operation of the DD direct-drive motor on the C-axis assembly can drive the rotating disk to rotate, thereby realizing the rotation adjustment of the placed equipment, thereby realizing multi-directional adjustment of the equipment, which is convenient for processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a left-side stereoscopic structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the present invention from a right perspective;

[0020] Figure 3 It is a schematic diagram of the structure of the vertical section of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of a partial cross-section of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of a partial cross-section of the present invention;

[0023] Figure 6 For the present invention Figure 1 Schematic diagram of the structure of part A.

[0024] In the figure: 1. bed; 2. wall column; 3. frame-in-frame frame; 4. Y-axis servo motor; 5. first ball screw assembly; 6. linear guide assembly; 7. linear guide slider; 8. frame hole; 9. saddle; 10. X-axis servo motor; 11. second ball screw assembly; 12. movable slide rail; 13. movable slider; 14. lifting hole; 15. spindle slide; 16. Z-axis servo motor; 17. third ball screw assembly; 18. sliding groove; 19. sliding block; 20. processing table; 21. cradle; 22. servo motor; 23. bearing; 24. rotating shaft; 25. bottom groove; 26. DD direct drive motor; 27. rotating disk; 28. lower notch. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of this patent, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0027] Example: Refer to Figure 1-6 The overhead crane frame-frame cradle 5-axis vertical machining center includes a bed 1, two wall columns 2 are installed on the bed 1, a frame-frame rack 3 is installed on the two wall columns 2 through a Y-axis guide rail driving assembly, a frame hole 8 is opened on the frame-frame rack 3, a saddle 9 is movably installed on the frame hole 8, the saddle 9 is connected to the frame-frame rack 3 through an X-axis guide rail driving assembly, and the saddle 9 is connected through a Z-axis lifting assembly, a processing table 20 is installed above the bed 1, the processing table 20 is located between the two wall columns 2, an A-axis assembly is provided on the wall column 2, the A-axis assembly is connected to the processing table 20, and a rotating disk 27 is installed on the processing table 20 through a C-axis assembly.

[0028] As a technical optimization solution of the present invention, the A-axis assembly includes a servo motor 22 fixedly mounted on one side of the wall column 2, two cradle frames 21 are fixedly mounted on the top side of the processing table 20, the output end of the servo motor 22 is connected to a rotating shaft 24, one end of the rotating shaft 24 rotates through the wall column 2 and is fixedly mounted on one side of the cradle frame 21, a mounting hole is opened on one side of the wall column 2, a bearing 23 is installed in the mounting hole, one end of the rotating shaft 24 rotates through the bearing 23, and the C-axis assembly includes a bottom groove 25 opened on the bottom side of the processing table 20, a DD direct drive motor 26 is fixedly mounted on the bottom groove 25, and the output end of the DD direct drive motor 26 extends to the cradle frame 21. The top side of the bed 1 is provided with a lower notch 28, and the lower notch 28 is located below the processing table 20. By setting an A-axis assembly, the servo motor 22 on the A-axis assembly can drive the rotating shaft 24 to rotate, thereby driving the processing table 20 to rotate under the action of the cradle 21, so as to achieve the orientation adjustment of the equipment placed on the processing table 20. The C-axis assembly is set, and the DD direct-drive motor 26 on the C-axis assembly can drive the rotating disk 27 to rotate, thereby achieving the rotation adjustment of the placed equipment, thereby achieving multi-directional adjustment of the equipment, which is convenient for processing.

[0029] As a technical optimization scheme of the present invention, the Y-axis guide rail driving assembly includes a Y-axis servo motor 4 fixedly installed on the top side of the wall column 2, the output end of the Y-axis servo motor 4 is fixedly installed with a first ball screw assembly 5, one side of the first ball screw assembly 5 is fixedly installed on one side of the frame frame 3, a linear guide rail assembly 6 is fixedly installed on the top side of the wall column 2, a linear guide rail slider 7 is installed on the bottom side of the frame frame 3, and the linear guide rail slider 7 is slidably installed on the linear guide rail assembly 6, and the X-axis guide rail driving assembly includes an X-axis servo motor 10 fixedly installed on the top side of the frame frame 3, and the output end of the X-axis servo motor 10 is connected to a second Ball screw assembly 11, one side of the second ball screw assembly 11 is fixedly mounted on one side of the saddle 9, two movable slide rails 12 are fixedly mounted on the top side of the frame frame 3, two groups of movable slide blocks 13 are installed on the bottom side of the saddle 9, and the two groups of movable slide blocks 13 are respectively slidably mounted on the two groups of movable slide rails 12, the Z-axis lifting assembly includes a lifting hole 14 opened on the saddle 9, the spindle slide 15 is movably mounted on the lifting hole 14, a Z-axis servo motor 16 is fixedly mounted on one side of the spindle slide 15, and a third ball screw assembly 17 is fixedly mounted on the output end of the Z-axis servo motor 16, and the bottom side of the third ball screw assembly 17 is fixedly mounted on the saddle 9 On the top side, a sliding groove 18 is provided on the inner wall of the lifting hole 14, a sliding block 19 is fixedly installed on the outer side of the spindle slide 15, and the sliding block 19 is slidably installed in the sliding groove 18. The spindle slide 15 on the vertical machining center is installed on the saddle 9, located in the middle position of the saddle 9, and the saddle 9 is movably installed in the frame hole 8 on the frame frame rack 3. The X-axis servo motor 10 on the X-axis guide rail driving assembly is used to realize the movement of the saddle 9 on the frame frame rack 3. The movable slide rail 12 and the movable slider 13 are set to achieve stability during the movement. The Z-axis lifting assembly is set, and the Z-axis servo motor 16 on the Z-axis lifting assembly is realized. The up and down movement of the spindle slide 15, the set sliding groove 18 and the sliding block 19 can realize the position movement of the spindle slide 15, the set Y-axis guide rail drive assembly, the operation of the Y-axis servo motor 4 on the Y-axis guide rail drive assembly can drive the frame-in-frame rack 3 to move, the set linear guide rail assembly 6 and the linear guide slider 7 can realize the stability and accuracy of the movement, and the spindle slide of the frame-in-frame rack 3 structure is increased. Through this double-guide sub-support frame-in-frame structure for the spindle slide, the traditional single-cantilever single-guide sub-support structure of the spindle is avoided, the rigidity and force of the spindle are greatly improved, and the accuracy and stability of the machine tool are greatly improved.

[0030] When in use: the spindle slide 15 on the vertical machining center is installed on the saddle 9, located in the middle position of the saddle 9, and the saddle 9 is movably installed in the frame hole 8 on the frame frame 3, and the X-axis servo motor 10 on the X-axis guide rail driving assembly is used to realize the movement of the saddle 9 on the frame frame 3 along the X-axis, and the movable slide rail 12 and the movable slider 13 are set to achieve stability during the movement process, and the Z-axis lifting assembly and the Z-axis servo motor 16 on the Z-axis lifting assembly are set to realize the movement of the spindle slide 15 along the Z-axis, and the sliding groove 18 and the sliding block 19 are set to realize the position movement of the spindle slide 15, and the Y-axis guide rail driving assembly and the Y-axis servo motor 4 on the Y-axis guide rail driving assembly are set to drive the frame frame 3 to move along the Y-axis, and the linear guide rail assembly 6 and the linear guide rail slider are set 7. To achieve the stability and accuracy of movement, a spindle slide of a frame-in-frame frame 3 structure is added. Through the double-guide rail sub-support frame-frame structure of the spindle slide, the spindle of the traditional single-cantilever single-guide rail sub-support structure is avoided, which greatly improves the rigidity and force of the spindle, and greatly improves the accuracy and stability of the machine tool. By setting the A-axis assembly, the servo motor 22 on the A-axis assembly is running, which can drive the rotating shaft 24 to rotate, thereby driving the processing table 20 to rotate under the action of the cradle 21, so as to achieve the azimuth adjustment of the equipment placed on the processing table 20. The C-axis assembly is set, and the DD direct-drive motor 26 on the C-axis assembly is running, which can drive the rotating disk 27 to rotate, so as to achieve the rotation adjustment of the placed equipment, so as to achieve multi-directional adjustment of the equipment, which is convenient for processing and easy to use.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A 5-axis vertical machining center with a crane frame and a frame-in-frame cradle, comprising a bed (1), characterized in that: Two wall columns (2) are installed on the bed (1), and a frame-in-frame rack (3) is installed on the two wall columns (2) through a Y-axis guide rail driving assembly. A frame hole (8) is opened on the frame-in-frame rack (3), and a saddle (9) is movably installed on the frame hole (8). The saddle (9) is connected to the frame-in-frame rack (3) through an X-axis guide rail driving assembly, and the saddle (9) is connected through a Z-axis lifting assembly. A processing table (20) is installed above the bed (1), and the processing table (20) is located between the two wall columns (2). An A-axis assembly is provided on the wall column (2), and the A-axis assembly is connected to the processing table (20). A rotating disk (27) is installed on the processing table (20) through a C-axis assembly.

2. The 5-axis vertical machining center with a crane frame and a frame-in-frame cradle according to claim 1 is characterized in that: The A-axis assembly comprises a servo motor (22) fixedly mounted on one side of a wall column (2); two cradle frames (21) are fixedly mounted on the top side of the processing table (20); an output end of the servo motor (22) is connected to a rotating shaft (24); one end of the rotating shaft (24) rotates through the wall column (2) and is fixedly mounted on one side of the cradle frame (21).

3. The 5-axis vertical machining center with a crane frame and a frame cradle according to claim 2 is characterized in that: A mounting hole is provided on one side of the wall column (2), a bearing (23) is installed in the mounting hole, and one end of the rotating shaft (24) rotates through the bearing (23).

4. The 5-axis vertical machining center for the crane frame-frame cradle according to claim 1 is characterized in that: The C-axis assembly comprises a bottom groove (25) formed on the bottom side of the processing table (20), a DD direct drive motor (26) being fixedly mounted on the bottom groove (25), an output end of the DD direct drive motor (26) extending above the processing table (20) and being fixedly connected to the bottom side of a rotating disk (27), a lower notch (28) being formed on the top side of the bed (1), and the lower notch (28) being located below the processing table (20).

5. The 5-axis vertical machining center with a crane frame and a frame cradle according to claim 1 is characterized in that: The Y-axis guide rail driving assembly comprises a Y-axis servo motor (4) fixedly mounted on the top side of the wall column (2); a first ball screw assembly (5) is fixedly mounted on the output end of the Y-axis servo motor (4); and one side of the first ball screw assembly (5) is fixedly mounted on one side of the frame-in-frame rack (3).

6. The 5-axis vertical machining center for the crane frame-frame cradle according to claim 5 is characterized in that: A linear guide assembly (6) is fixedly mounted on the top side of the wall column (2), a linear guide slider (7) is mounted on the bottom side of the frame-in-frame rack (3), and the linear guide slider (7) is slidably mounted on the linear guide assembly (6).

7. The 5-axis vertical machining center with a crane frame, a frame-in-frame cradle according to claim 1, characterized in that: The X-axis guide rail driving assembly comprises an X-axis servo motor (10) fixedly mounted on the top side of the frame-in-frame rack (3); the output end of the X-axis servo motor (10) is connected to a second ball screw assembly (11); one side of the second ball screw assembly (11) is fixedly mounted on one side of the saddle (9).

8. The 5-axis vertical machining center with a crane frame, a frame-in-frame cradle according to claim 7, characterized in that: Two movable slide rails (12) are fixedly installed on the top side of the frame-in-frame rack (3), and two groups of movable slide blocks (13) are installed on the bottom side of the saddle (9). The two groups of movable slide blocks (13) are respectively slidably installed on the two groups of movable slide rails (12).

9. The 5-axis vertical machining center with a crane frame, a frame-in-frame cradle according to claim 1, characterized in that: The Z-axis lifting assembly comprises a lifting hole (14) formed on a saddle (9), a spindle ram (15) movably mounted on the lifting hole (14), a Z-axis servo motor (16) fixedly mounted on one side of the spindle ram (15), a third ball screw assembly (17) fixedly mounted on the output end of the Z-axis servo motor (16), the bottom side of the third ball screw assembly (17) fixedly mounted on the top side of the saddle (9), a sliding groove (18) formed on the inner wall of the lifting hole (14), a sliding block (19) fixedly mounted on the outer side of the spindle ram (15), and the sliding block (19) slidably mounted in the sliding groove (18).

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