Portal frame of gantry machine tool

Abstract

The utility model relates to the technical field of portal frames, and discloses a portal frame of a portal machine tool. The gantry beam is installed at the top ends of the first gantry stand column and the second gantry stand column, two first sliding rails are installed at the top end of the gantry beam, and sliding strip holes are formed in the gantry beam. The two gantry sliding saddles are installed in the sliding strip holes in a combined mode, an installation groove is formed in the middle of each gantry sliding saddle, the top ends of the gantry sliding saddles extend outwards to form bearing blocks, and first sliding blocks are installed at the bottoms of the bearing blocks and connected with the first sliding rails; a first sliding sleeve is installed in the middle of the outer wall of one gantry sliding saddle and connected with a first lead screw, the first lead screw is connected with a first motor through a coupler, and the first motor is installed on the side wall of the first gantry stand column. The five-face machining spindle solves the problem that an existing five-face machining spindle is installed on one side of the gantry cross beam to run, and stress is not uniform in the running process, and due to the design that the gantry sliding saddle penetrates through the middle of the gantry cross beam, stress of the gantry cross beam is uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of gantry frames, in particular to a gantry frame of a gantry machine tool. Background Art

[0002] With the continuous improvement of the requirements for part complexity and machining accuracy in the aerospace, automotive manufacturing, energy, and mold industries, the five-sided machining ability has become an important development trend of gantry machining centers. The traditional advantages of gantry machining centers lie in their strong load-bearing capacity and stable machining performance, which are suitable for heavy industry machining with large cutting amounts. There is no need to frequently replace tooling or re-clamp workpieces, thereby reducing the machining preparation time and improving production efficiency.

[0003] As shown in the attached Figure 1 In the existing gantry frame shown, the existing five-sided machining spindle runs on one side of the gantry crossbeam. The square ram spindle box is located on one side of the gantry crossbeam for a long time. Due to its own gravity, it will have a certain forward tilt towards the side of the square ram spindle box, resulting in uneven force during operation, which in turn affects the machining accuracy and machining efficiency. Summary of the Utility Model

[0004] In view of the above problems, the utility model proposes a gantry frame of a gantry machine tool to solve the problems that the existing five-sided machining spindle runs on one side of the gantry crossbeam, resulting in uneven force during operation, which in turn affects the machining accuracy and low machining efficiency. To achieve the above object, a gantry frame of a gantry machine tool of the utility model includes:

[0005] A gantry base, which is installed on the ground;

[0006] A first gantry column;

[0007] A second gantry column, and the first gantry column and the second gantry column are connected to both sides of the gantry base;

[0008] A gantry crossbeam, which is installed on the tops of the first gantry column and the second gantry column. Two first slide rails are installed on the top of the gantry crossbeam, and a sliding strip hole is arranged inside the gantry crossbeam;

[0009] A gantry saddle, two gantry saddles are assembled and installed in the sliding strip hole. An installation groove is formed in the middle of the two gantry saddles. A receiving block extends outward from the top of the gantry saddle. A first slider is installed at the bottom of the receiving block, and the first slider is connected to the first slide rail. A first sliding sleeve is installed in the middle of the outer wall of a gantry saddle. The first sliding sleeve is connected to a first lead screw. The first lead screw is connected to a first motor through a coupling, and the first motor is installed on the side wall of the first gantry column;

[0010] A square ram spindle box, which is installed in the installation groove, and the top of the square ram spindle box is connected to a second motor;

[0011] The pentahedron machining spindle head is installed at the bottom of the square ram spindle box.

[0012] Preferably, a second sliding block is installed at the bottom of the side wall of the gantry saddle, and the second sliding block is connected to the second sliding rail on the inner wall of the sliding bar hole.

[0013] Preferably, the gantry base further comprises:

[0014] The third slide rails, four third slide rails are installed on the top of the gantry base;

[0015] A third motor, which is mounted on one end of the top surface of the gantry base and is arranged between two third slide rails in the middle;

[0016] A workbench, a third slider is embedded in the bottom of the workbench, the third slider is connected to the third slide rail, a second sliding sleeve is also installed at the bottom of the workbench, the second sliding sleeve is connected to the second screw rod, and the second screw rod is connected to the output end of the third motor through a coupling.

[0017] Preferably, two fourth motors are installed on the top of the gantry saddle, the output ends of the fourth motors are connected to the closed slide, and the closed slide is connected to the square slide headstock.

[0018] Preferably, the first slide rail and the second slide rail are ball-type linear slide rails.

[0019] Preferably, the first sliding sleeve is welded to the middle part of the outer wall of the gantry saddle, and the second sliding sleeve is welded to the bottom of the workbench.

[0020] Preferably, the first sleeve and the second sleeve are inner-circulation ball sleeves, and the first screw rod and the second screw rod are ball screws.

[0021] Preferably, the gantry crossbeam is mounted on the top of the first gantry column and the second gantry column by screws.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] The gantry design of this device has a strong supporting structure, similar to the solidity of a bridge pier, to improve the overall rigidity and stability. The design of the gantry slide saddle passing through the middle of the gantry beam makes the gantry beam evenly stressed.

[0024] The square ram spindle box is fully surrounded by a gantry crossbeam and a gantry saddle to support the structural design. It has highly rigid side walls and internal support structures to withstand large cutting forces and heavy loads during machining. The gantry saddle and square ram spindle box are installed in a "box in box" design, which has strong rigidity and can effectively resist lateral forces and torques during machining. It can effectively prevent the spindle box from tilting forward due to gravity, thus ensuring machining accuracy and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic structural diagram of a gantry in the prior art.

[0026] Figure 2 Schematic structural diagram of the gantry of the gantry machine tool of the present utility model.

[0027] Figure 3 Front view structural schematic diagram of the gantry of the gantry machine tool of the present utility model.

[0028] Figure 4 Schematic structural diagram of the connection between the gantry saddle and the gantry crossbeam of the present utility model.

[0029] In the figure: 1, gantry base; 2, first gantry column; 3, second gantry column; 4, gantry crossbeam; 5, first slide rail; 6, sliding strip hole; 7, gantry saddle; 8, installation groove; 9, receiving block; 10, first slider; 11, first sliding sleeve; 12, first lead screw; 13, first motor; 14, square ram spindle box; 15, second motor; 16, five-sided machining spindle head; 17, second slider; 18, second slide rail; 19, third slide rail; 20, third motor; 21, workbench; 22, third slider; 23, second sliding sleeve; 24, second lead screw; 25, fourth motor. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "set" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The embodiments of the present utility model will be described below according to its overall structure.

[0032] Please refer to Figures 2 - 4 , the present utility model provides a technical solution: a gantry of a gantry machine tool, including:

[0033] A gantry base 1, which is installed on the ground; as the support foundation of the entire machine tool, it is usually made of high-density cast iron to ensure sufficient rigidity and stability. The gantry base 1 is designed to disperse the weight and resist the forces and vibrations generated during the machining process.

[0034] The first gantry column 2;

[0035] The second gantry column 3, and the first gantry column 2 and the second gantry column 3 are connected to both sides of the gantry base 1;

[0036] A gantry crossbeam 4, which is installed on the tops of the first gantry column 2 and the second gantry column 3. Two first slide rails 5 are installed on the top of the gantry crossbeam 4, and a sliding bar hole is provided inside the gantry crossbeam 4;

[0037] Gantry saddles 7, two gantry saddles 7 are assembled and installed in the sliding bar hole 6. An installation groove 8 is formed in the middle of the two gantry saddles 7. A receiving block 9 extends outward from the top of the gantry saddle 7. A first slider 10 is installed at the bottom of the receiving block 9, and the first slider 10 is connected to the first slide rail 5; a first sliding sleeve 11 is installed in the middle of the outer wall of one gantry saddle 7, the first sliding sleeve 11 is connected to the first lead screw 12, the first lead screw 12 is connected to the first motor 13 through a coupling, and the first motor 13 is installed on the side wall of the first gantry column 2;

[0038] The square ram spindle box 14 is installed in the installation groove 8, and the top of the square ram spindle box 14 is connected to the second motor 15;

[0039] The five-sided machining spindle head 16 is installed at the bottom of the square ram spindle box 14.

[0040] Working principle: The first motor 13 drives the first lead screw 12 to rotate, and the first sliding sleeve 11 drives the gantry saddle 7 to move on the gantry crossbeam 4; the fourth motor 25 drives the square ram spindle box 14 to move, and the third motor 20 drives the workbench 21 to move, completing the working process in sequence.

[0041] Functions of the first gantry column 2 and the second gantry column 3: The first gantry column 2 and the second gantry column 3 are designed similar to the piers of a bridge. The pier-style first gantry column 2 and second gantry column 3 have a large cross-section and a heavy structure, which can provide extremely high static and dynamic rigidity. This design helps to resist the cutting force and vibration generated during the machining process, enhancing the overall stability and rigidity of the machine tool.

[0042] Functions of the gantry crossbeam 4: The two ends of the gantry crossbeam 4 are fixed by the first gantry column 2 and the second gantry column 3 to form a stable support structure; the first slide rail 5 is installed on the gantry crossbeam 4, which is a high-precision linear guide rail for carrying moving components such as the gantry saddle 7 and the square ram spindle box 14 to ensure their precise movement during the machining process, forming the Y-axis movement platform. The gantry crossbeam 4 has extremely high rigidity to support the movement of the gantry saddle 7 without deformation.

[0043] Functions of the gantry saddle 7: The gantry saddle 7 is mainly used to provide precise positioning and stable support during the machining process, adopting the "box-in-box" design; the first slide rail 5 on the gantry crossbeam 4 and the gantry saddle 7 are symmetrical, suppressing the cutting force in the X direction when the square ram spindle box 14 is machined. Therefore, the "box-in-box" structure has strong rigidity and can effectively resist the cutting side force and torque in the X axis during the machining process, ensuring the machining accuracy. The gantry saddle 7 connects the gantry crossbeam 4 and the square ram spindle box 14, moves along the Y axis on the gantry crossbeam 4, and supports the square ram spindle box 14 to move in the Z axis.

[0044] The gantry saddle 7 is designed with a symmetric structure. The design of the gantry crossbeam 4 and the gantry saddle 7 makes the gravity of the square ram spindle box 14 vertically downward, with uniform force, so that the square ram spindle box 14 always remains centered in the middle of the first gantry column 2 and the second gantry column 3, without the tendency to tilt forward or backward. This enables the machine tool to withstand a large cutting force during the machining process, especially during heavy cutting and high-speed machining, maintaining machining accuracy and stability, and ensuring machining accuracy and surface quality. The first gantry column 2 and the second gantry column 3 are fixed on the gantry base 1, supporting the upper structure of the machining area, namely the gantry crossbeam 4, the gantry saddle 7, the square ram spindle box 14, and the five-sided machining spindle head 16, and providing a linear movement path for the Z-axis.

[0045] Another preferred way:

[0046] A second slider 17 is installed at the bottom of the side wall of the gantry saddle 7. The second slider 17 is connected to the second slide rail 18 on the inner wall of the slide bar hole 6, increasing the running stability and accuracy of the gantry saddle 7, and avoiding the scraping phenomenon between the gantry saddle 7 and the gantry crossbeam 4 during the rigid machining process.

[0047] Another preferred way:

[0048] The gantry base 1 further includes:

[0049] The third slide rail 19. Four third slide rails 19 are installed at the top end of the gantry base 1. The four third slide rails 19 adopt a roller linear guide rail structure to support the movement of the gantry workbench 21 without deformation.

[0050] The third motor 20. The third motor 20 is installed at one end of the top surface of the gantry base 1 and is arranged between the middle two third slide rails 19.

[0051] The workbench 21. The third slider 22 is embedded at the bottom of the workbench 21. The third slider 22 is connected to the third slide rail 19. A second sliding sleeve 23 is also installed at the bottom of the workbench 21. The second sliding sleeve 23 is connected to the second lead screw 24. The second lead screw 24 is connected to the output end of the third motor 20 through a coupling.

[0052] The function of the workbench 21: The workbench 21 is the basis for workpiece machining. It provides a stable platform for placing and fixing workpieces. The workbench 21 is usually made of cast iron or high-strength steel plate to ensure sufficient rigidity and hardness to withstand the cutting force during the machining process. Through the cooperation of the third slide rail 19 and the third slider 22, the workbench 21 is effectively supported, increasing its stability. At the same time, through the cooperation of the second lead screw 24 and the second sliding sleeve 23, its axial operation is more stable. The design of four third slide rails 19 increases the contact area between the gantry saddle 7 and the gantry crossbeam 4, reducing the chatter of the gantry saddle 7 and the square ram spindle box 14 during work, making the operation smoother, and improving the accuracy and efficiency of the machined products.

[0053] Another preferred method:

[0054] Two fourth motors 25 are installed on the top of the gantry slide saddle 7. The output end of the fourth motor 25 is connected to the closed slide, and the closed slide is connected to the square slide ram spindle box 14.

[0055] Another preferred method:

[0056] The first slide rail 5 and the second slide rail 18 are ball-type linear slide rails, and the first slider 10 and the second slider 17 are ball sliders.

[0057] The first sleeve 11 is welded to the middle of the outer wall of the gantry saddle 7, and the second sleeve 23 is welded to the bottom of the workbench 21. The first sleeve 11 and the second sleeve 23 are inner circulation ball sleeves, and the first screw rod 12 and the second screw rod 24 are ball screws.

[0058] Another preferred method:

[0059] The gantry crossbeam 4 is mounted on the top of the first gantry column 2 and the top of the second gantry column 3 by screws.

[0060] The gantry design of the device has a strong supporting structure, similar to the solidity of a bridge pier, to improve the overall rigidity and stability. The design of the gantry slide saddle 7 passing through the middle of the gantry cross beam 4 makes the gantry cross beam 4 evenly stressed.

[0061] The square ram spindle box 14 is fully surrounded by a support structure designed through the gantry crossbeam 4 and the gantry saddle 7. It has high-rigidity side walls and internal support structures to withstand large cutting forces and heavy loads during machining. The gantry saddle 7 and the square ram spindle box 14 are installed in a "box in box" design, which has strong rigidity and can effectively resist lateral forces and torques during machining, and can effectively prevent the spindle box from tilting forward due to gravity, thereby ensuring machining accuracy and stability.

[0062] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

Claims

1. A gantry of a gantry machine tool, characterized in that: include: A gantry base (1), wherein the gantry base (1) is installed on the ground; First gantry post (2); A second gantry column (3), wherein the first gantry column (2) and the second gantry column (3) are connected to two sides of the gantry base (1); A gantry crossbeam (4), the gantry crossbeam (4) being mounted on the top of the first gantry column (2) and the second gantry column (3), two first slide rails (5) being mounted on the top of the gantry crossbeam (4), and a slide bar hole (6) being arranged in the gantry crossbeam (4); A gantry saddle (7), wherein two gantry saddles (7) are assembled and installed in a sliding bar hole (6), and an installation groove (8) is formed in the middle of the two gantry saddles (7). A receiving block (9) extends outward from the top of the gantry saddle (7), and a first slider (10) is installed at the bottom of the receiving block (9), and the first slider (10) is connected to the first slide rail (5); a first sliding sleeve (11) is installed in the middle of the outer wall of the gantry saddle (7), and the first sliding sleeve (11) is connected to the first screw rod (12), and the first screw rod (12) is connected to the first motor (13) through a coupling, and the first motor (13) is installed on the side wall of the first gantry column (2); A square ram spindle box (14), wherein the square ram spindle box (14) is installed in the installation groove (8), and the top of the square ram spindle box (14) is connected to a second motor (15); A pentahedron machining spindle head (16) is installed at the bottom of a square ram spindle box (14).

2. The gantry of the gantry machine tool according to claim 1, characterized in that: A second sliding block (17) is installed at the bottom of the side wall of the gantry sliding saddle (7), and the second sliding block (17) is connected to a second sliding rail (18) on the inner wall of the sliding bar hole (6).

3. The gantry of the gantry machine tool according to claim 1, characterized in that: The gantry base (1) further comprises: A third slide rail (19), four of the third slide rails (19) are mounted on the top of the gantry base (1); A third motor (20), the third motor (20) being mounted on one end of the top surface of the gantry base (1) and disposed between two third slide rails (19) in the middle; A workbench (21), wherein a third slider (22) is embedded in the bottom of the workbench (21), wherein the third slider (22) is connected to a third slide rail (19), and a second sliding sleeve (23) is also installed at the bottom of the workbench (21), wherein the second sliding sleeve (23) is connected to a second screw rod (24), and the second screw rod (24) is connected to an output end of a third motor (20) via a coupling.

4. The gantry of the gantry machine tool according to claim 1, characterized in that: Two fourth motors (25) are installed on the top of the gantry saddle (7), and the output end of the fourth motor (25) is connected to a closed slide, and the closed slide is connected to the square ram spindle box (14).

5. The gantry of the gantry machine tool according to claim 1, characterized in that: The first slide rail (5) and the second slide rail (18) are ball-type linear slide rails.

6. The gantry of the gantry machine tool according to claim 3, characterized in that: The first sliding sleeve (11) is welded to the middle of the outer wall of the gantry sliding saddle (7), and the second sliding sleeve (23) is welded to the bottom of the workbench (21).

7. The gantry of the gantry machine tool according to claim 1, characterized in that: The first sliding sleeve (11) and the second sliding sleeve (23) are inner-circulating ball sliding sleeves, and the first screw rod (12) and the second screw rod (24) are ball screw rods.

8. The gantry of the gantry machine tool according to claim 1, characterized in that: The gantry crossbeam (4) is mounted on the top of the first gantry column (2) and the second gantry column (3) by means of screws.

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