Gantry machining device and machine tool

Abstract

The utility model provides a kind of gantry machining device and machine tool, gantry machining device includes first beam column, second beam column, beam body and machining device, beam body includes first beam body and second beam body, first beam body and second beam body are side by side along the thickness direction of beam body, and first beam body and second beam body are welded connection along the thickness direction of beam body, first beam body and / or second beam body are section bar.The utility model discloses gantry machining device by first beam body and second beam body being side by side welded along the thickness direction of beam body, and at least one of them is section bar, the combination mode of the forming characteristics of section bar and split beam welding is used, the optimization of beam body structure is realized, without complex custom processing and a large number of correction process, simplify the manufacturing process of beam body, improve the structural stability and adaptability of gantry machining device.

Description

Technical Field

[0001] This utility model relates to the field of machine tools, and more specifically, to a gantry machining device and machine tool. Background Technology

[0002] In the field of modern machining, gantry machining centers are core equipment for achieving high-precision machining of large and heavy workpieces. Their structural stability and machining efficiency directly determine the production quality. The beam, as a key load-bearing component of the gantry machining center, must simultaneously meet the performance requirements of high rigidity and low deformation to ensure the precision stability of the machining center during high-speed movement and cutting operations.

[0003] In existing technologies, the beams of gantry machining equipment mostly adopt a welded structure made of all-steel plates, formed by cutting and welding multiple steel plates. This structure has certain drawbacks: the fit of the steel plates needs to be precisely adjusted during splicing, resulting in large welding gaps, leading to a large amount of welding filler and high labor costs; the heat input from extensive welding can easily cause bending, twisting, and other deformations in the beam, affecting the accuracy of subsequent guide rail installation and requiring additional correction; moreover, the solid steel plate structure has a large self-weight, increasing the load-bearing pressure on the beams and columns, which not only increases the overall energy consumption of the machine but may also affect the service life of the equipment due to long-term heavy loads. In addition, the all-steel plate welding relies on customized cutting and complex splicing processes, resulting in a long manufacturing cycle and making it difficult to meet the needs of rapid response production. Utility Model Content

[0004] The purpose of this utility model is to provide a gantry machining device with low welding workload, minimal deformation, short manufacturing cycle, and lightweight construction, as well as a machine tool incorporating this device. The gantry machining device optimizes the beam structure by configuring the beam body as a first beam and a second beam welded side-by-side along the thickness direction, with at least one being a profile. Utilizing the forming characteristics of the profile and the combination of beam welding, the beam body structure is optimized, eliminating the need for complex custom processing and numerous straightening procedures, simplifying the beam body manufacturing process, and improving the structural stability and adaptability of the gantry machining device. To achieve the above objectives, this utility model provides the following technical solution:

[0005] On one hand, the present invention provides a gantry processing device, including a first beam column, a second beam column, a beam body disposed on the first beam column and the second beam column, and a processing device disposed on the beam body. The beam body includes a first beam body and a second beam body, the first beam body and the second beam body are arranged side by side along the thickness direction of the beam body, and the first beam body and the second beam body are welded together along the thickness direction of the beam body; wherein, the first beam body and / or the second beam body are profiles.

[0006] In some embodiments, the profile is a standard square tube, which includes a top plate, a bottom plate, and a first vertical plate and a second vertical plate connecting the top plate and the bottom plate, wherein the top plate, bottom plate, first vertical plate, and second vertical plate form a square frame structure; or,

[0007] The profile is an H-beam, which includes a top plate, a bottom plate, and a vertical plate connecting the top plate and the bottom plate, the top plate, bottom plate, and vertical plate forming an H-shaped structure; or,

[0008] The profile is a channel steel, which includes a top plate, a bottom plate, and a vertical plate connecting the top plate and the bottom plate. The top plate, bottom plate, and vertical plate form a channel-shaped structure.

[0009] In some embodiments, the gantry machining device further includes a third beam, wherein the first beam and the third beam are steel plates, the second beam is an H-beam, the first beam and the third beam are respectively disposed on the front and rear sides of the second beam, and the top plate and the bottom plate of the second beam are welded to the first beam and the third beam.

[0010] In some embodiments, the gantry machining device further includes a third beam, wherein the first beam and the second beam are channel steel, the third beam is a steel plate, the third beam is disposed between the first beam and the second beam, and the third beam is welded to the top and bottom plates of the first beam and the second beam.

[0011] In some embodiments, the first beam body includes a first upper beam block and a first lower beam block, which are arranged side by side along the height direction of the beam body and are connected by welding to each other; the second beam body includes a second upper beam block and a second lower beam block, which are arranged side by side along the height direction of the beam body and are connected by welding to each other; wherein, the ends of the first beam body and / or the second beam body are provided with end plates.

[0012] In some embodiments, the front side of the beam is a first mounting surface, the top surface of the beam is a second mounting surface, a first guide rail is provided at the lower part of the first mounting surface, a second guide rail is provided at the front part above the second mounting surface, the normals of the working surfaces of the first guide rail and the second guide rail are orthogonal to each other, and the length directions of the first guide rail and the second guide rail are parallel to the length direction of the beam, and at least part of the processing device is supported above the second guide rail.

[0013] In some embodiments, a power device is provided on the upper part of the first mounting surface. The power device includes a motor fixed to the first mounting surface, a lead screw driven by the motor, and a lead screw mounting seat provided at the end of the lead screw. The lead screw mounting seat is fixed to the first mounting surface, and the processing device is connected to the lead screw by a nut.

[0014] In some embodiments, the first beam-column includes a first column and a first base located at the lower end of the first column, the cross-sectional area of ​​the first base in the horizontal plane being larger than the cross-sectional area of ​​the first column in the horizontal plane; the second beam-column includes a second column and a second base located at the lower end of the second column, the cross-sectional area of ​​the second base in the horizontal plane being larger than the cross-sectional area of ​​the second column in the horizontal plane; wherein, a first fixing rib is respectively connected between the front side of the first column and the upper side of the first base, and between the front side of the second column and the upper side of the second base; the lower side of the beam body is respectively connected to the first column and the side of the second column near the processing device with a second fixing rib;

[0015] The beam, the first column, and the second column have a cavity structure inside. The rear side of the beam is provided with several weight-reducing holes, and the rear and sides of the first and second columns are respectively provided with weight-reducing holes.

[0016] On the other hand, this utility model provides a machine tool, including a base and any of the above-described gantry machining devices. The gantry machining device is disposed on the base. The machining device includes a slide saddle, a spindle box slidably disposed on the slide saddle, and a spindle disposed in the spindle box. The slide slidably disposed on the beam, and the working end of the spindle faces the base.

[0017] In some embodiments, the bottom of the first beam and the second beam are respectively provided with a plurality of sliders, and the top two sides of the base are respectively provided with third guide rails, and the gantry processing device is slidably mounted on the third guide rails via the sliders.

[0018] The beneficial effects of this utility model are as follows: This utility model provides a gantry machining device with less welding workload, less deformation, shorter manufacturing cycle, and lighter weight, as well as a machine tool including the device. The gantry machining device optimizes the beam structure by setting the beam body as a first beam and a second beam welded side-by-side along the thickness direction, with at least one of them being a profile. By utilizing the forming characteristics of the profile and the combination of beam welding, the overall deformation of the beam body is controlled within a small range. This facilitates ensuring the installation accuracy of the guide rails in different processing scenarios, adapts to the processing needs of various large workpieces, eliminates the need for complex custom processing and numerous straightening procedures, simplifies the manufacturing and maintenance process of the beam body, and improves the structural stability and adaptability of the gantry machining device. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the gantry machining device of this utility model;

[0021] Figure 2 This is a side view of a standard square tube when the profile is a standard square tube;

[0022] Figure 3 This is a schematic diagram of another embodiment of the gantry machining device of this utility model;

[0023] Figure 4 This is a side view of the beam when the profile is H-beam;

[0024] Figure 5 This is a side view of the beam body when the profile is channel steel;

[0025] Figure 6 This is a structural schematic diagram of the gantry machining device of this utility model from another angle.

[0026] The attached figures are labeled as follows:

[0027] 1-First beam-column, 2-Second beam-column, 3-Beam body, 4-Processing device, 5-Power device, 6-First fixed rib, 7-Second fixed rib

[0028] 11-First column, 12-First base, 21-Second column, 22-Second base, 31-First beam, 32-Second beam, 33-Third beam, 34-Sealing plate, 36-First mounting surface, 37-Second mounting surface, 41-Slide saddle, 42-Spindle box, 43-Spindle, 51-Motor, 52-Lead screw, 53-Lead screw mounting seat

[0029] a-Top slab, b-Bottom slab, c1-First vertical slab, c2-Second vertical slab, c-Vertical slab, 311-First upper beam block, 312-First lower beam block, 321-Second upper beam block, 322-Second lower beam block, 361-First guide rail, 371-Second guide rail Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0031] It should be noted that in the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more features.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection or a connection that can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements, an indirect connection, or an interaction between two elements.

[0035] The following disclosure provides many different implementation methods or examples for different solutions to implement this utility model.

[0036] On the one hand, such as Figures 1 to 6 As shown, this embodiment of the utility model provides a gantry machining device. Figure 1 As shown, the gantry machining device includes a first beam column 1, a second beam column 2, a beam body 3 mounted on the first beam column 1 and the second beam column 2, and a machining device 4 mounted on the beam body 3. The first beam column 1 and the second beam column 2 are the supporting structures of the gantry machining device, used to support the top beam body 3 and maintain overall stability; the beam body 3, mounted on the first beam column 1 and the second beam column 2, serves as the mounting foundation for the machining device 4; the machining device 4, containing components such as the spindle box and cutting tools used to perform machining operations, is mounted on the beam body 3, forming a complete machining execution system.

[0037] The beam body 3 includes a first beam body 31 and a second beam body 32. The first beam body 31 and the second beam body 32 are arranged side by side along the thickness direction of the beam body 3, and the first beam body 31 and the second beam body 32 are welded together along the thickness direction of the beam body 3. While ensuring the connection strength, compared with the splicing of a whole thick steel plate, the length and filling amount of a single weld can be reduced, the welding heat input can be reduced, and thus deformation can be reduced. Among them, the first beam body 31 and / or the second beam body 32 are profiles. The regularity of the profile simplifies the processing procedures, such as reducing the steel plate cutting and leveling processes. Its structural characteristics, such as hollow structure, can achieve lightweighting and simplify the splicing process, shorten the overall manufacturing cycle, and thus improve production efficiency.

[0038] like Figure 2 As shown, when the profile is a standard square tube, the standard square tube includes a top plate a, a bottom plate b, and a first vertical plate c1 and a second vertical plate c2 connecting the top plate a and the bottom plate b. The top plate a, bottom plate b, first vertical plate c1, and second vertical plate c2 form a square frame structure, which can be integrally cast, that is, the four parts enclose each other to form a closed square frame structure, which works together to bear the load and has high torsional resistance; as shown Figure 4 As shown, when the profile is an H-beam, the H-beam includes a top plate a, a bottom plate b, and a vertical plate c connecting the top plate a and the bottom plate b. The top plate a, bottom plate b, and vertical plate c form an H-shaped structure, which can be integrally cast and has strong lateral bending resistance; for example... Figure 5 As shown, when the profile is a channel steel, the channel steel includes a top plate a, a bottom plate b, and a vertical plate c connecting the top plate a and the bottom plate b. The top plate a, bottom plate b, and vertical plate c form a channel structure, which is convenient to splice with other components. It can also be integrally cast, which can better suit the scenarios that require lateral connection.

[0039] like Figure 3 and Figure 4As shown, as a preferred embodiment, the gantry machining device may further include a third beam 33, with the first beam 31 and the third beam 33 being steel plates, and the second beam 32 being an H-beam. The first beam 31 and the third beam 33 are respectively located on the front and rear sides of the second beam 32, and the top and bottom plates of the second beam 32 are welded to the first beam 31 and the third beam. When the second beam 32 is an H-beam, the third beam 33 and the first beam 31 work together to form a complete beam structure. The first beam 31 and the third beam 33 serve as auxiliary support components for the second beam 32, enhancing the overall thickness-direction rigidity of the beam 3 and improving its torsional resistance. The second beam 32 bears the main loads of the beam, such as the self-weight of the machining device 4 and cutting forces. Utilizing its H-section, it ensures that the structure is not easily deformed under heavy loads. Meanwhile, the H-beam of the second beam body 32 is a standard profile, which does not require complicated splicing and adjustment when welding with the steel plate. The welding gap is small, which reduces the amount of welding filler and time, and lowers the manufacturing cost. The welding heat input is low, and the symmetry of the H-beam structure itself can greatly reduce bending, twisting and other deformations after welding, and reduce the workload of subsequent straightening processes.

[0040] like Figure 5 As shown, in a preferred embodiment, the gantry machining device may further include a third beam 33. The first beam 31 and the second beam 32 are channel steel, and the third beam 33 is a steel plate. The third beam 33 is positioned between the first beam 31 and the second beam 32, and is welded to the top and bottom plates of the first beam 31 and the second beam 32. The first beam 31 and the second beam 32 are symmetrically distributed on both sides, and the third beam 33 is located between them, forming a symmetrical "channel steel-steel plate-channel steel" structure through welding, thus creating a rigid whole. When the beam 3 is subjected to lateral or vertical loads, the first beam 31 and the second beam 32 are subjected to balanced forces, avoiding stress concentration on one side. The top and bottom plates of the third beam 33 and the first beam 31, as well as the top and bottom plates of the second beam 32, provide a flat welding surface with high welding strength. This allows the load of the processing device to be evenly transferred to the channel steel on both sides, and then distributed to the foundation through the beams and columns, avoiding local overload. No additional processing is required during connection, simplifying the positioning process.

[0041] like Figure 6As shown, the first beam 31 may include a first upper beam block 311 and a first lower beam block 312, which are arranged side by side along the height direction of the beam 3 and are connected by welding. The second beam 32 includes a second upper beam block 321 and a second lower beam block 322, which are arranged side by side along the height direction of the beam 3 and are connected by welding. The structures of the upper and lower beam blocks can be welded separately and then spliced ​​together, reducing the heat input of a single welding operation and facilitating the control of thermal deformation of the beam 3. Furthermore, by adjusting the height ratio of the upper and lower beam blocks, it can flexibly adapt to gantry processing devices of different specifications. For example, Figure 2 , 4 and Figure 5 As shown, the ends of the first beam body 31 and / or the second beam body 32 are provided with sealing plates 34 to prevent the ends from sagging or twisting when the processing device is under heavy load. The flatness of the end face of the sealing plate 34 can also serve as a positioning reference for the connection between the beam body 3 and the first beam column 1 and the second beam column 2, which facilitates the calibration of the horizontality and verticality of the beam body 3 during installation.

[0042] like Figure 1 As shown, the front side of the beam body 3 is the first mounting surface 36, and the top surface of the beam body 3 is the second mounting surface 37. A first guide rail 361 is provided at the lower part of the first mounting surface 36, and a second guide rail 371 is provided at the front part above the second mounting surface 37. The normals of the working surfaces of the first guide rail 361 and the second guide rail 371 are orthogonal to each other, and the length directions of the first guide rail 361 and the second guide rail 371 are parallel to the length direction of the beam body 3. At least part of the machining device 4 is supported above the second guide rail 371. The second guide rail 371 bears the vertical load of the machining device, such as its own weight and the vertical component of the cutting force, limiting the vertical offset of the machining device 4. The first guide rail 361 bears the horizontal lateral component of the cutting force, limiting the swing or offset of the machining device in the front-back direction. The orthogonal normals of the working surfaces of the first guide rail 361 and the second guide rail 371 strictly limit the movement of the machining device 4 along the length direction of the beam body 3, avoiding skewness or jamming, and improving the load-bearing capacity and stability of the gantry machining device while ensuring high-precision movement.

[0043] like Figure 1As shown, a power unit 5 is provided on the upper part of the first mounting surface 36. The power unit 5 includes a motor 51 fixed on the first mounting surface 36, a lead screw 52 driven by the motor 51, and a lead screw mounting seat 53 provided at the end of the lead screw 52. The lead screw mounting seat 53 is fixed on the first mounting surface 36, and the processing device 4 is connected to the lead screw 52 by a nut. The power unit 5 provides a continuous and controllable driving force to the processing device 4, and works with the first guide rail 361 and the second guide rail 371 to achieve high-precision linear motion along the length of the beam body 3. The power unit 5 is installed on the upper part of the first mounting surface 36, close to the center of gravity of the processing device 4, and the line of action of the driving force passes through or is close to the center of gravity, avoiding the overturning moment generated by the processing device 4 when starting or stopping at high speed, and ensuring motion stability.

[0044] like Figure 1 and 6 As shown, the first beam-column 1 includes a first column 11 and a first base 12 located at the lower end of the first column 11. The cross-sectional area of ​​the first base 12 in the horizontal plane is larger than that of the first column 11 in the horizontal plane. The second beam-column 2 includes a second column 21 and a second base 22 located at the lower end of the second column 21. The cross-sectional area of ​​the second base 22 in the horizontal plane is larger than that of the second column 21 in the horizontal plane, which increases the contact area with the base and reduces the pressure per unit area. First fixing ribs 6 are respectively connected between the front side of the first column 11 and the upper side of the first base 12, and between the front side of the second column 21 and the upper side of the second base 22. Second fixing ribs 7 are respectively connected to the lower side of the beam body 3 and the side of the first column 11 and the second column 21 closest to the processing device 4. When the processing device 4 moves along the beam body 3, the load is transmitted to the first beam column 1 and the second beam column 2 through the beam body 3. The first fixed rib 6 can resist the overturning moment generated when the processing device is eccentrically loaded, and reduce the forward tilting tendency of the first beam column 1 and the second beam column 2 due to the load. The second fixed rib 7 can resist the bending deformation of the connection node between the beam body 3 and the first beam column 1 and the second beam column 2, and prevent the beam body 3 from deforming due to its own weight or load, so as to ensure that the first beam column 1 and the second beam column 2 have no relative displacement under dynamic load.

[0045] Meanwhile, the interiors of beam 3, first column 11, and second column 21 are chamber structures. Several weight-reduction holes are provided on the rear side of beam 3, and weight-reduction holes are provided on the rear and sides of first column 11 and second column 21, respectively. Through lightweight design, the chamber structure and weight-reduction holes reduce the inertial mass of beams and columns, improving the overall flexibility of the gantry machining device.

[0046] On the other hand, this utility model also provides a machine tool, including a base and any of the aforementioned gantry machining devices. The gantry machining device is mounted on the base. The machining device 4 includes a slide saddle 41, a spindle box 42 slidably mounted on the slide saddle 41, and a spindle 43 mounted within the spindle box 42. The slide saddle 41 is slidably mounted on the beam 3, and the working end of the spindle 43 faces the base. Since this machine tool has the aforementioned gantry machining device, it also has the corresponding effects of the gantry machining device, which will not be elaborated further here.

[0047] Several sliders are respectively installed at the bottom of the first beam column 1 and the second beam column 2, and third guide rails are respectively installed on both sides of the top of the base. The gantry machining device is slidably mounted on the third guide rails by the sliders, realizing the overall movement of the gantry machining device.

[0048] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gantry machining device, comprising a first beam column (1), a second beam column (2), a beam body (3) disposed on the first beam column (1) and the second beam column (2), and a machining device (4) disposed on the beam body (3), characterized in that, The beam body (3) includes a first beam body (31) and a second beam body (32), the first beam body (31) and the second beam body (32) are arranged side by side along the thickness direction of the beam body (3), and the first beam body (31) and the second beam body (32) are welded together along the thickness direction of the beam body (3); wherein, the first beam body (31) and / or the second beam body (32) are profiles.

2. The gantry machining apparatus according to claim 1, characterized in that, The profile is a standard square tube, which includes a top plate (a), a bottom plate (b), and a first vertical plate (c1) and a second vertical plate (c2) connecting the top plate (a) and the bottom plate (b). The top plate (a), bottom plate (b), first vertical plate (c1), and second vertical plate (c2) form a square frame structure; or, The profile is an H-beam, which includes a top plate (a), a bottom plate (b), and a vertical plate (c) connecting the top plate (a) and the bottom plate (b). The top plate (a), bottom plate (b), and vertical plate (c) form an H-shaped structure; or, The profile is a channel steel, which includes a top plate (a), a bottom plate (b), and a vertical plate (c) connecting the top plate (a) and the bottom plate (b). The top plate (a), bottom plate (b), and vertical plate (c) form a channel structure.

3. The gantry machining apparatus according to claim 2, characterized in that, It also includes a third beam (33), the first beam (31) and the third beam (33) are steel plates, the second beam (32) is an H-beam, the first beam (31) and the third beam (33) are respectively disposed on the front side and the rear side of the second beam (32), and the top plate and bottom plate of the second beam (32) are welded to the first beam (31) and the third beam (33).

4. The gantry machining apparatus according to claim 2, characterized in that, It also includes a third beam (33), wherein the first beam (31) and the second beam (32) are channel steel, the third beam (33) is a steel plate, the third beam (33) is disposed between the first beam (31) and the second beam (32), and the third beam (33) is welded to the top and bottom plates of the first beam (31) and the top and bottom plates of the second beam (32).

5. The gantry machining apparatus according to any one of claims 1-4, characterized in that, The first beam body (31) includes a first upper beam block (311) and a first lower beam block (312), the first upper beam block (311) and the first lower beam block (312) are arranged side by side along the height direction of the beam body (3), and the first upper beam block (311) and the first lower beam block (312) are connected by welding to each other; the second beam body (32) includes a second upper beam block (321) and a second lower beam block (322), the second upper beam block (321) and the second lower beam block (322) are arranged side by side along the height direction of the beam body (3), and the second upper beam block (321) and the second lower beam block (322) are connected by welding to each other; wherein, the ends of the first beam body (31) and / or the second beam body (32) are provided with sealing plates (34).

6. The gantry machining apparatus according to any one of claims 1-4, characterized in that, The front side of the beam body (3) is a first mounting surface (36), and the top surface of the beam body (3) is a second mounting surface (37). A first guide rail (361) is provided at the lower part of the first mounting surface (36), and a second guide rail (371) is provided at the front part above the second mounting surface (37). The normals of the working surfaces of the first guide rail (361) and the second guide rail (371) are orthogonal to each other, and the length directions of the first guide rail (361) and the second guide rail (371) are parallel to the length direction of the beam body (3). At least part of the processing device (4) is supported above the second guide rail (371).

7. The gantry machining apparatus according to claim 6, characterized in that, A power device (5) is provided on the upper part of the first mounting surface (36). The power device (5) includes a motor (51) fixed on the first mounting surface (36), a lead screw (52) driven by the motor (51), and a lead screw mounting seat (53) provided at the end of the lead screw (52). The lead screw mounting seat (53) is fixed on the first mounting surface (36). The processing device (4) is connected to the lead screw (52) by a nut.

8. The gantry machining apparatus according to any one of claims 1-4, characterized in that, The first beam column (1) includes a first column (11) and a first base (12) located at the lower end of the first column (11), the cross-sectional area of ​​the first base (12) in the horizontal plane is greater than the cross-sectional area of ​​the first column (11) in the horizontal plane; the second beam column (2) includes a second column (21) and a second base (22) located at the lower end of the second column (21), the cross-sectional area of ​​the second base (22) in the horizontal plane is greater than the cross-sectional area of ​​the second column (21) in the horizontal plane; wherein, a first fixed rib plate (6) is respectively connected between the front side of the first column (11) and the upper side of the first base (12) and between the front side of the second column (21) and the upper side of the second base (22); the lower side of the beam body (3) is respectively connected to the side of the first column (11) and the second column (21) near the processing device (4) with a second fixed rib plate (7); The interior of the beam body (3), the first column (11) and the second column (21) is a cavity structure. The rear side of the beam body (3) is provided with several weight-reducing holes, and the rear and sides of the first column (11) and the second column (21) are respectively provided with weight-reducing holes.

9. A machine tool, comprising a base, characterized in that, It also includes the gantry machining device according to any one of claims 1 to 8, the gantry machining device is disposed on the base, the machining device (4) includes a slide saddle (41), a spindle box (42) slidably disposed on the slide saddle (41) and a spindle (43) disposed in the spindle box (42), the slide saddle (41) is slidably disposed on the beam body (3), and the working end of the spindle (43) faces the base.

10. The machine tool according to claim 9, characterized in that, The bottom of the first beam (1) and the second beam (2) are respectively provided with several sliders, and the top two sides of the base are respectively provided with third guide rails. The gantry processing device is slidably mounted on the third guide rails through the sliders.

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