Vertical machining center stand column structure for supporting double spindle boxes

Abstract

The invention provides a vertical machining center stand column structure for supporting double spindle boxes, and relates to the field of vertical machining centers, the vertical machining center stand column structure comprises a stand column body, a Z-direction moving structure is arranged on the front side of the stand column body, and the stand column body is in driving connection with the spindle boxes and used for driving the spindle boxes to move up and down; main reinforcing ribs are arranged on the periphery of the inner wall of the cavity structure, and a reinforcing rib plate is arranged in the middle of the cavity structure; a heat dissipation mechanism is arranged on the rear side of the stand column body, and heat dissipation through holes are formed in the stand column body. Flowing gas is blown into the cavity of the stand column body through the heat dissipation mechanism, heat in the stand column body is quickly blown out of the stand column body from the heat dissipation through holes, the flowing gas is continuously conveyed through the heat dissipation mechanism, it is guaranteed that the heat in the stand column body cannot be concentrated, and the heat dissipation performance in the stand column body is improved; the possibility of thermal deformation of the stand column body is reduced, and the product machining precision is further prevented from being affected.

Description

Technical Field

[0001] This invention relates to the field of vertical machining center technology, and more specifically, to a column structure for a vertical machining center that supports dual spindle boxes. Background Technology

[0002] Twin-spindle vertical machining centers are highly efficient and precise mechanical equipment with advantages such as improved production efficiency, high machining accuracy, and multiple functions. In the modern machining industry, twin-spindle vertical machining centers are widely used in aerospace, automobile manufacturing, and other fields because they can process two workpieces simultaneously, greatly improving machining efficiency. As the core supporting component of a vertical machining center, the performance of the column directly affects the product machining accuracy, stability, and equipment lifespan.

[0003] Currently, existing columns have insufficient internal heat dissipation. The heat generated during long-term operation cannot be effectively dissipated and accumulates in the column, which may cause thermal deformation and further affect the product processing accuracy. Summary of the Invention

[0004] The present invention aims to solve the problem of insufficient heat dissipation performance inside the column in the prior art, which leads to the inability to effectively dissipate the heat generated during long-term operation and causes thermal deformation of the column.

[0005] To solve the above problems, the present invention provides a vertical machining center column structure supporting dual spindle boxes, including a column body, a Z-axis moving structure provided on the front side of the column body, and the column body is driven to drive the spindle boxes to move up and down. The column body is a hollow structure, and the inner wall of the hollow structure is provided with main reinforcing ribs around its perimeter, and a reinforcing rib plate is provided in the middle of the hollow structure. An X-axis vibration damping structure is provided between the front and rear sides of the column body; a Y-axis vibration damping structure is provided between the left and right sides of the column body and the reinforcing ribs; and a Z-axis vibration damping structure is provided between the upper and lower sides of the column body. A heat dissipation mechanism is provided on the rear side of the column body for blowing flowing gas into the cavity of the column body, and heat dissipation through holes are provided on the column body.

[0006] The present invention provides a vertical machining center column structure supporting dual spindle boxes, which, compared with the prior art, has, but is not limited to, the following beneficial effects: This vertical machining center column structure supporting dual spindle boxes utilizes a hollow column body design. Main reinforcing ribs and reinforcing plates provide stable structural support. Heat dissipation holes are created in the column body to initially dissipate heat generated during prolonged operation. A cooling mechanism then blows flowing gas into the cavity of the column body, working in conjunction with the heat dissipation holes to rapidly expel heat from the column body to the outside. The continuous flow of gas through the cooling mechanism ensures that heat within the column body is not completely dissipated. The design concentrates heat dissipation within the column body, improving its internal heat dissipation performance and reducing the possibility of thermal deformation, thus further preventing any impact on product processing accuracy. Vibration is reduced in the X-direction through an X-axis damping structure, in the Y-direction through a Y-direction damping structure, and in the Z-direction through a Z-direction damping structure. This allows for comprehensive vibration reduction of the column body in space, effectively suppressing vibrations and deformations generated during processing, increasing the stiffness of the column body in all directions, and enhancing support stability.

[0007] Furthermore, there are two Z-axis moving structures, corresponding one-to-one with two spindle boxes. Each Z-axis moving structure includes a lead screw and a motor. One end of the lead screw is rotatably mounted with a transmission seat, which is fixedly mounted on the upper front side of the column body. The other end of the lead screw is rotatably mounted with a lead screw bracket, which is fixedly mounted on the lower front side of the column body. The motor is fixedly mounted on the top of the transmission seat, and the power output shaft of the motor is connected to one end of the lead screw. The spindle box is threadedly connected to the lead screw, and the spindle box is slidably connected to the column body.

[0008] Furthermore, a connecting frame is provided on the side of the spindle box close to the column body, and a screw nut that is threadedly connected to the screw is fixedly installed on the connecting frame; The lead screw is symmetrically provided with linear rails on its left and right sides. Two of the linear rails are fixedly installed on the front side wall of the column body. Six sliders are fixedly installed on the side of the spindle box close to the column body, and three sliders are slidably installed on one linear rail.

[0009] Furthermore, the parallelism error between the two rails is within ±0.0015mm, and the straightness error of the rail itself is within ±0.001mm.

[0010] Furthermore, a large pre-drilled hole is provided on the front side of the transmission seat, and a cover plate that fits over the large pre-drilled hole is installed on the front side of the transmission seat.

[0011] Furthermore, the main reinforcing ribs include trapezoidal reinforcing ribs, triangular reinforcing ribs, and "X"-shaped reinforcing ribs, which together form an orthogonal mesh structure distributed around the inner wall of the cavity structure.

[0012] Furthermore, the X-direction vibration damping structure, Y-direction vibration damping structure, and Z-direction vibration damping structure are identical in structure. The X-direction vibration damping structure includes two sleeves, which are fixedly connected to the front inner wall and the rear inner wall of the column body, respectively. The two sleeves of the left-side Y-direction vibration damping structure are fixedly connected to the left inner wall of the column body and the left inner wall of the reinforcing rib, respectively. The two sleeves of the right-side Y-direction vibration damping structure are fixedly connected to the right inner wall of the column body and the right inner wall of the reinforcing rib, respectively. The two sleeves of the Z-direction vibration damping structure are fixedly connected to the top and bottom inner walls of the column body, respectively. A damping component is movably inserted between the two sleeves. The damping component includes a damping rod and a damping cylinder. The other end of the damping rod extends movably into the damping cylinder. A buffer block is slidably disposed in the damping cylinder. The buffer block is fixedly connected to the damping rod. Damping springs are disposed on both the upper and lower sides of the buffer block. The damping springs are sleeved on the damping rod.

[0013] Furthermore, the heat dissipation mechanism includes a diversion tube frame, the output end of which is connected to the cavity structure, and air inlet pipes are provided on both the left and right sides of the diversion tube frame. Valves are provided on the air inlet pipes, and the input end of the air inlet pipes is connected to an external air supply device.

[0014] Furthermore, the flow divider includes several hollow horizontal tubes, and two adjacent hollow horizontal tubes are connected by several evenly distributed hollow vertical tubes. The output end of the air inlet tube is connected to the corresponding hollow vertical tube. The front sidewall of the hollow horizontal tube is evenly connected with a flow divider tube, and the output end of the flow divider tube is connected to the hollow structure.

[0015] Furthermore, the support legs of the column body are provided with mounting cavities, and the bottom of the mounting cavity is provided with mounting through holes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the column structure of a vertical machining center supporting dual spindle boxes according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the Z-axis moving structure according to an embodiment of the present invention; Figure 3 For the present invention Figure 2 Front view; Figure 4 This is a schematic diagram of the spindle box structure according to an embodiment of the present invention; Figure 5This is a schematic diagram showing the connection state between the column body and the heat dissipation mechanism in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the column body according to an embodiment of the present invention; Figure 7 For the present invention Figure 6 Front half-section view; Figure 8 For the present invention Figure 6 Rear half-section view; Figure 9 This is a schematic diagram of the cavity structure of the column body according to an embodiment of the present invention. Figure 1 ; Figure 10 This is a schematic diagram of the cavity structure of the column body according to an embodiment of the present invention. Figure 2 ; Figure 11 This is a schematic diagram of the cavity structure of the column body according to an embodiment of the present invention. Figure 3 ; Figure 12 This is a schematic diagram of the cavity structure of the column body according to an embodiment of the present invention. Figure 4 ; Figure 13 This is a schematic diagram of the heat dissipation mechanism according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the X-direction vibration reduction structure according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Column body; 101. Mounting cavity; 102. Mounting through hole; 2. Spindle box; 201. Connecting frame; 3. Z-axis moving structure; 301. Lead screw; 302. Motor; 303. Transmission seat; 3031. Reserved large hole; 304. Lead screw bracket; 305. Lead screw nut; 306. Linear guide; 307. Slider; 308. Cover plate; 4. Heat dissipation mechanism; 401. Hollow horizontal tube; 402. Hollow vertical tube; 4 03. Diverter pipe; 404. Inlet pipe; 405. Valve; 5. Main reinforcing rib; 501. Trapezoidal reinforcing rib; 502. Triangular reinforcing rib; 503. "X" shaped reinforcing rib; 6. X-direction vibration damping structure; 601. Sleeve; 602. Vibration damping rod; 603. Vibration damping cylinder; 604. Vibration damping spring; 605. Buffer block; 7. Y-direction vibration damping structure; 8. Z-direction vibration damping structure; 9. Heat dissipation through hole; 10. Reinforcing rib plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit the use of open-ended terms such as "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings are used to distinguish different objects, not to describe a specific order or hierarchy. 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, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0021] Furthermore, in the attached diagram, the X-axis represents the vertical direction, that is, the front-to-back position, and the positive direction of the X-axis (that is, the direction the arrow points to) represents the front, and the negative direction of the X-axis (that is, the direction opposite to the positive direction of the X-axis) represents the back. In the attached diagram, the Y-axis represents the horizontal direction, that is, the left-to-right position, and the positive direction of the Y-axis (that is, the direction the arrow points to) represents the left, and the negative direction of the Y-axis (that is, the direction opposite to the positive direction of the Y-axis) represents the right. In the attached diagram, the Z-axis represents the vertical direction, that is, the up-to-down position, and the positive direction of the Z-axis (that is, the direction the arrow points to) represents the up, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents the down.

[0022] It should also be noted that the meanings of the aforementioned X-axis, Y-axis and Z-axis are only for the convenience of describing the present invention and simplifying the description, and are not intended to 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 the present invention.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium; or 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.

[0024] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, components, or groups of features, integers, steps, or components.

[0025] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0026] See Figure 1 , Figure 5 , Figure 6 and Figure 9 An embodiment of the present invention provides a column structure for a vertical machining center supporting a dual spindle box, comprising a column body 1, a Z-axis moving structure 3 provided on the front side of the column body 1, and the column body 1 being driven to the spindle box 2 for driving the spindle box 2 to move up and down. The column body 1 is a hollow structure. The inner wall of the hollow structure is provided with main reinforcing ribs 5 around the perimeter, and a reinforcing rib plate 10 is provided in the middle of the hollow structure. An X-direction vibration damping structure 6 is provided between the front and rear sides inside the column body 1. A Y-direction vibration damping structure 7 is provided between the left and right sides inside the column body 1 and the reinforcing rib plate 10 respectively. A Z-direction vibration damping structure 8 is provided between the upper and lower sides inside the column body 1. A heat dissipation mechanism 4 is provided on the rear side of the column body 1, which is used to blow flowing gas into the cavity of the column body 1. A heat dissipation through hole 9 is provided on the column body 1.

[0027] In this embodiment, the vertical machining center column structure supporting the dual spindle boxes is designed with a hollow column body 1. Main reinforcing ribs 5 and reinforcing rib plates 10 provide stable structural support for the column body 1. Heat dissipation holes 9 are opened on the column body 1 to initially dissipate the heat generated during long-term operation. Then, a heat dissipation mechanism 4 blows flowing gas into the cavity of the column body 1. Combined with the heat dissipation holes 9, this rapidly dissipates the heat inside the column body 1 to the outside. The heat dissipation mechanism 4 continuously supplies flowing gas to ensure the column body 1... The heat is not concentrated, which improves the internal heat dissipation performance of the column body 1, reduces the possibility of thermal deformation of the column body 1, and further avoids affecting the product processing accuracy; the X-direction vibration damping structure 6 dampens the vibration generated in the X direction on the column body 1, the Y-direction vibration damping structure 7 dampens the vibration generated in the Y direction on the column body 1, and the Z-direction vibration damping structure 8 dampens the vibration generated in the Z direction on the column body 1, thereby facilitating all-round vibration damping of the column body 1 in space, effectively suppressing the vibration and deformation generated during processing, improving the stiffness of the column body 1 in all directions, and improving the support stability.

[0028] See Figures 1-3 Optionally, there are two Z-axis moving structures 3, corresponding one-to-one with the two spindle boxes 2. The Z-axis moving structure 3 includes a lead screw 301 and a motor 302. One end of the lead screw 301 is rotatably mounted with a transmission seat 303, which is fixedly mounted on the upper front side of the column body 1. The other end of the lead screw 301 is rotatably mounted with a lead screw bracket 304, which is fixedly mounted on the lower front side of the column body 1. The motor 302 is fixedly mounted on the top of the transmission seat 303, and the power output shaft of the motor 302 is connected to one end of the lead screw 301. The spindle box 2 is threadedly connected to the lead screw 301, and the spindle box 2 is slidably connected to the column body 1.

[0029] In this embodiment, the motor 302 provides driving force to drive the lead screw 301 to rotate in the forward or reverse direction on the transmission seat 303 and the lead screw bracket 304. Through the threaded connection between the spindle box 2 and the lead screw 301 and the sliding connection between the spindle box 2 and the column body 1, the spindle box 2 can be easily moved up and down when the lead screw 301 rotates.

[0030] It should be noted that the motor 302 can rotate in both forward and reverse directions. The motor 302 is existing technology and can be purchased from the market. This application uses it directly without changing its structure and function.

[0031] See Figure 2 , Figure 4Optionally, a connecting frame 201 is provided on the side of the spindle box 2 close to the column body 1, and a screw nut 305 that is threadedly connected to the screw 301 is fixedly installed on the connecting frame 201. The lead screw 301 is symmetrically provided with linear guides 306 on its left and right sides. The two linear guides 306 are fixedly installed on the front side wall of the column body 1. The spindle box 2 is fixedly installed with six sliders 307 on the side close to the column body 1, and every three sliders 307 are slidably installed on one linear guide 306.

[0032] In this embodiment, a screw nut 305 threadedly connected to a screw 301 is fixedly installed on the connecting bracket 201 on the spindle box 2, and two linear guides 306 are fixedly installed on the front side wall of the column body 1. A slider 307 that slides with the linear guide 306 is fixedly installed on the spindle box 2. Thus, when the screw 301 rotates, the transmission connection between the spindle box 2 and the screw 301 is realized through the threaded connection between the screw nut 305 and the screw 301. The sliding connection between the spindle box 2 and the column body 1 is realized through the sliding of the slider 307 on the linear guide 306. This facilitates the stable up-and-down movement of the spindle box 2 on one side of the column body 1.

[0033] See Figure 2 Optionally, the parallelism error between the two guide rails 306 is within ±0.0015mm, and the straightness error of the guide rail 306 itself is within ±0.001mm.

[0034] In this embodiment, by precisely machining the parallelism between the two linear guides 306 and the straightness of the linear guides 306 themselves, the error is kept very small, thereby greatly enhancing the load-bearing capacity of the column body 1 in the horizontal and vertical directions, effectively dispersing the cutting force, gravity and inertial force generated when the dual spindle boxes 2 are working, ensuring that the spindle box 2 moves smoothly and accurately, and greatly improving the overall rigidity and stability of the column body 1.

[0035] See Figure 3 Optionally, a pre-reserved large hole 3031 is provided on the front side of the transmission seat 303, and a cover plate 308 that covers the pre-reserved large hole 3031 is installed on the front side of the transmission seat 303.

[0036] In this embodiment, the reserved large hole 3031 facilitates the installation, connection and disassembly of the power output shaft of the motor 302 and the lead screw 301. The reserved large hole 3031 is then covered and sealed by the cover plate 308 to reduce the entry of external dust into the transmission seat 303 and affect the connection and transmission between the power output shaft of the motor 302 and the lead screw 301.

[0037] See Figures 7-12Optionally, the main reinforcing rib 5 includes trapezoidal reinforcing rib 501, triangular reinforcing rib 502 and "X" shaped reinforcing rib 503. The trapezoidal reinforcing rib 501, triangular reinforcing rib 502 and "X" shaped reinforcing rib 503 together form an orthogonal mesh structure distributed around the inner wall of the cavity structure.

[0038] In this embodiment, the trapezoidal reinforcing ribs 501, triangular reinforcing ribs 502, and "X"-shaped reinforcing ribs 503, which together form an orthogonal mesh structure, effectively enhance the strength of the column body 1, improve the column body 1's ability to resist complex stresses, and further reduce the deformation of the column body 1 during the processing.

[0039] See Figures 7-9 and Figure 14 Optionally, the X-direction vibration damping structure 6, the Y-direction vibration damping structure 7, and the Z-direction vibration damping structure 8 have the same structure. The X-direction vibration damping structure 6 includes two sleeves 601, which are fixedly connected to the inner front side wall and the inner rear side wall of the column body 1, respectively. The two sleeves 601 in the left Y-direction vibration damping structure 7 are fixedly connected to the inner left side wall of the column body 1 and the left side wall of the reinforcing rib plate 10, respectively. The two sleeves 601 in the right Y-direction vibration damping structure 7 are fixedly connected to the inner right side wall of the column body 1 and the right side wall of the reinforcing rib plate 10, respectively. The two sleeves 601 in the Z-direction vibration damping structure 8 are fixedly connected to the inner top and the inner bottom of the column body 1, respectively. A damping component is movably inserted between the two sleeves 601. The damping component includes a damping rod 602 and a damping cylinder 603. The other end of the damping rod 602 extends movably into the damping cylinder 603. A buffer block 605 is slidably disposed in the damping cylinder 603. The buffer block 605 is fixedly connected to the damping rod 602. Damping springs 604 are provided on both the upper and lower sides of the buffer block 605. The damping springs 604 are sleeved on the damping rod 602.

[0040] In this embodiment, for the X-direction vibration damping structure 6, the Y-direction vibration damping structure 7, and the Z-direction vibration damping structure 8, when the column body 1 vibrates, the vibration is transmitted to the damping rod 602 in the X, Y, and Z directions, respectively. This causes the damping rod 602 to tend to move or move along the length of the damping cylinder 603 between the two sleeves 601, thereby causing the buffer block 605 to tend to compress or compress the two damping springs 604. This transmits the vibration to the two damping springs 604, and the vibration energy is offset by the elastic buffer of the damping springs 604, thus achieving the effect of vibration damping. This achieves all-round vibration damping of the column body 1 in space, effectively suppressing the vibration and deformation generated during the processing.

[0041] See Figure 5 and Figure 13Optionally, the heat dissipation mechanism 4 includes a diversion pipe frame, the output end of which is connected to the cavity structure, and an air inlet pipe 404 is provided on both the left and right sides of the diversion pipe frame. A valve 405 is provided on the air inlet pipe 404, and the input end of the air inlet pipe 404 is connected to an external air supply device.

[0042] In this embodiment, a strong airflow is delivered to the inlet pipe 404 through an air supply device (such as an air pump), and the valve 405 is opened so that the strong airflow enters the split pipe frame through the inlet pipe 404. When there is sufficient airflow in the split pipe frame, the valve 405 on the other inlet pipe 404 can be closed, and only one inlet pipe 404 is used to deliver strong airflow to the split pipe frame. When there is insufficient airflow in the split pipe frame, both valves 405 are opened, and two inlet pipes 404 are used to deliver strong airflow from both sides of the split pipe frame into its interior, improving applicability. Finally, the strong airflow is delivered to the cavity structure through the split pipe frame for blowing and heat dissipation.

[0043] See Figure 5 and Figure 13 Optionally, the flow divider includes several hollow horizontal tubes 401, and two adjacent hollow horizontal tubes 401 are connected by several evenly distributed hollow vertical tubes 402. The output end of the air inlet pipe 404 is connected to the corresponding hollow vertical tube 402. The front side wall of the hollow horizontal tube 401 is evenly connected with a flow divider 403, and the output end of the flow divider 403 is connected to the hollow structure.

[0044] In this embodiment, the strong airflow output from the diversion pipe 403 is diverted and transported to each cavity horizontal pipe 401 through the cavity vertical pipe 402. After sufficient strong airflow is input into the diversion pipe frame, the strong airflow in the diversion pipe frame is evenly diverted and transported to the cavity of the column body 1 through each diversion pipe 403. The heat inside the column body 1 is blown to the outside through each heat dissipation hole 9 on the column body 1, which facilitates effective heat dissipation and reduces the possibility of thermal deformation of the column body 1.

[0045] See Figure 2 , Figure 5 and Figure 6 Optionally, the support legs of the column body 1 are provided with mounting cavities 101, and mounting through holes 102 are provided at the bottom of the inner side of the mounting cavity 101.

[0046] In this embodiment, the mounting cavity 101 is used with screws through the mounting through hole 102 to facilitate the fixing and disassembly of the column body 1 on the machine tool bed.

[0047] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A column structure for supporting dual spindle boxes in a vertical machining center, characterized in that, Includes a column body (1), the front side of which is provided with a Z-axis moving structure (3), and the column body (1) is driven to connect with the spindle box (2) for driving the spindle box (2) to move up and down; The column body (1) is a hollow structure, and the inner wall of the hollow structure is provided with main reinforcing ribs (5) around the perimeter, and a reinforcing rib plate (10) is provided in the middle of the hollow structure. An X-direction vibration damping structure (6) is provided between the front and rear sides of the column body (1), a Y-direction vibration damping structure (7) is provided between the left and right sides of the column body (1) and the reinforcing rib plate (10), and a Z-direction vibration damping structure (8) is provided between the upper and lower sides of the column body (1). A heat dissipation mechanism (4) is provided on the rear side of the column body (1) for blowing flowing gas into the cavity of the column body (1). A heat dissipation through hole (9) is provided on the column body (1).

2. The vertical machining center column structure supporting dual spindle boxes according to claim 1, characterized in that, The number of Z-axis moving structures (3) is two, corresponding one-to-one with the two spindle boxes (2). The Z-axis moving structure (3) includes a lead screw (301) and a motor (302). One end of the lead screw (301) is rotatably mounted with a transmission seat (303), which is fixedly mounted on the upper front side of the column body (1). The other end of the lead screw (301) is rotatably mounted with a lead screw bracket (304), which is fixedly mounted on the lower front side of the column body (1). The motor (302) is fixedly mounted on the top of the transmission seat (303), and the power output shaft of the motor (302) is connected to one end of the lead screw (301). The spindle box (2) is threadedly connected to the lead screw (301), and the spindle box (2) is slidably connected to the column body (1).

3. The vertical machining center column structure supporting dual spindle boxes according to claim 2, characterized in that, A connecting frame (201) is provided on the side of the spindle box (2) close to the column body (1), and a screw nut (305) that is threadedly connected to the screw (301) is fixedly installed on the connecting frame (201). The lead screw (301) is symmetrically provided with linear rails (306) on its left and right sides. Two linear rails (306) are fixedly installed on the front side wall of the column body (1). Six sliders (307) are fixedly installed on the side of the spindle box (2) close to the column body (1), and every three sliders (307) are slidably installed on one linear rail (306).

4. The vertical machining center column structure supporting dual spindle boxes according to claim 3, characterized in that, The parallelism error between the two said guide rails (306) is within ±0.0015mm, and the straightness error of the guide rail (306) itself is within ±0.001mm.

5. The vertical machining center column structure supporting dual spindle boxes according to claim 2, characterized in that, The transmission seat (303) has a reserved large hole (3031) on its front side, and a cover plate (308) that covers the reserved large hole (3031) is installed on the front side of the transmission seat (303).

6. The vertical machining center column structure supporting dual spindle boxes according to claim 1, characterized in that, The main reinforcing rib (5) includes a trapezoidal reinforcing rib (501), a triangular reinforcing rib (502) and an "X"-shaped reinforcing rib (503). The trapezoidal reinforcing rib (501), the triangular reinforcing rib (502) and the "X"-shaped reinforcing rib (503) together form an orthogonal mesh structure distributed around the inner wall of the cavity structure.

7. The vertical machining center column structure supporting dual spindle boxes according to claim 1, characterized in that, The X-direction vibration damping structure (6), Y-direction vibration damping structure (7), and Z-direction vibration damping structure (8) have the same structure. The X-direction vibration damping structure (6) includes two sleeves (601). The two sleeves (601) in the X-direction vibration damping structure (6) are fixedly connected to the inner front side wall and inner rear side wall of the column body (1), respectively. The two sleeves (601) in the left-side Y-direction vibration damping structure (7) are fixedly connected to the inner left side wall of the column body (1) and the left side wall of the reinforcing rib plate (10), respectively. The two sleeves (601) in the right-side Y-direction vibration damping structure (7) are fixedly connected to the inner right side wall of the column body (1) and the right side wall of the reinforcing rib plate (10), respectively. The two sleeves (601) in the Z-direction vibration damping structure (8) are fixedly connected to the inner top and inner bottom of the column body (1), respectively. A damping component is movably inserted between the two sleeves (601). The damping component includes a damping rod (602) and a damping cylinder (603). The other end of the damping rod (602) extends movably into the damping cylinder (603). A buffer block (605) is slidably disposed in the damping cylinder (603). The buffer block (605) is fixedly connected to the damping rod (602). Damping springs (604) are disposed on both the upper and lower sides of the buffer block (605). The damping springs (604) are sleeved on the damping rod (602).

8. The vertical machining center column structure supporting dual spindle boxes according to claim 1, characterized in that, The heat dissipation mechanism (4) includes a diversion pipe frame, the output end of which is connected to the cavity structure, and an air inlet pipe (404) is provided on both the left and right sides of the diversion pipe frame. A valve (405) is provided on the air inlet pipe (404), and the input end of the air inlet pipe (404) is connected to an external air supply device.

9. The vertical machining center column structure supporting dual spindle boxes according to claim 8, characterized in that, The diversion frame includes several hollow horizontal tubes (401), and two adjacent hollow horizontal tubes (401) are connected by several evenly distributed hollow vertical tubes (402). The output end of the air inlet pipe (404) is connected to the corresponding hollow vertical tube (402). The front side wall of the hollow horizontal tube (401) is evenly connected with a diversion pipe (403), and the output end of the diversion pipe (403) is connected to the hollow structure.

10. The vertical machining center column structure supporting dual spindle boxes according to claim 1, characterized in that, The support legs of the column body (1) are provided with mounting cavities (101), and the bottom of the mounting cavity (101) is provided with mounting through holes (102).

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