Bending-resistant beam for a gantry machining center
Patent Information
- Application Number
- CN202522001747.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-09-17
AI Technical Summary
[0004]本实用新型的目的在于提供桥式龙门加工中心抗弯横梁，用以解决现有技术的横梁中间容易下沉以影响加工精度的技术问题
[0004]本实用新型的目的在于提供桥式龙门加工中心抗弯横梁，用以解决现有技术的横梁中间容易下沉以影响加工精度的技术问题。
Smart Images
Figure CN224779893U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the anti-bending crossbeam of a bridge-type gantry machining center. Background Technology
[0002] The crossbeam is a key moving component of a gantry machining center, carrying the slide and ram along the bed. With the rapid development of aerospace, aircraft, shipbuilding, and machinery industries, bridge-type gantry machining centers are widely used in the machining of various large and complex spatial curved surface parts. To meet the high-speed, high-precision, and high-efficiency machining requirements of component technological innovation and industrial upgrading, the crossbeam not only needs to bear its own weight, the weight of key components such as the slide, ram, and power head, but also needs to have good dynamic performance to achieve rapid and stable operation of the machining center, thereby ensuring the accuracy of component machining and meeting the technical requirements of the components.
[0003] Because of their long length, existing crossbeams inevitably sag in the middle, especially when the ram moves to the middle position, where the sag is greatest. Since the ram is located at the front of the crossbeam, it also applies a torsional moment, which seriously affects its machining accuracy. Furthermore, the sag of the crossbeam is also affected by its own weight, making it difficult to improve its bending resistance by increasing the crossbeam's cross-sectional area. This makes the problem of preventing the crossbeam from bending and sag even more difficult to solve. Utility Model Content
[0004] The purpose of this utility model is to provide a bending-resistant crossbeam for a bridge-type gantry machining center, in order to solve the technical problem that the crossbeam in the prior art is prone to sinking in the middle, which affects the machining accuracy.
[0005] The technical solution of this utility model is as follows: A bridge-type gantry machining center anti-bending crossbeam includes a crossbeam body. The crossbeam body includes parallel front and rear vertical plates. The upper and lower sides of the front and rear vertical plates are connected by a top plate and a bottom plate, respectively. Guide rails for sliding of the slide table are installed on the front vertical plate and the top plate. A reinforcing vertical plate is provided between the front and rear vertical plates. The upper and lower sides of the reinforcing vertical plate are connected to the top plate and the bottom plate, respectively. The reinforcing vertical plate is connected to the front vertical plate by vertically arranged connecting ribs on multiple layers of plates. The reinforcing vertical plate is connected to the rear vertical plate by a layer of plates. Vertically arranged connecting ribs connect the upper and lower areas of the reinforced vertical plate and the front vertical plate, respectively, to form a bending-resistant box girder. The bending-resistant box girder has a trapezoidal structure that is larger at the top and smaller at the bottom, and includes a front side plate, a rear side plate, a bottom side plate, and a bottom inclined plate. The front and rear side plates are parallel to the front vertical plate, and the bottom side plate is parallel to the bottom plate. One end of the bottom inclined plate is connected to the bottom side plate, and the other end is connected to the bottom plate. The bottom and rear sides of the bending-resistant box girder are respectively provided with prestressed tensioning components. The prestressed tensioning components include tensioning seats that are symmetrically fixed relative to the bending-resistant box girder and tensioning rods for tensioning between the two tensioning seats.
[0006] The beneficial effects of this technical solution: When using the anti-bending beam of the bridge-type gantry machining center, due to the weight of the beam itself, as well as the weight of components such as the slide, ram, and power head, and the relatively long length of the beam, the middle of the beam tends to sag. This technical solution adds a reinforcing vertical plate to the traditional double-layer vertical plate, utilizing the strong horizontal bending resistance of the vertical plate to achieve the first level of anti-sag. Furthermore, the connection between the reinforcing vertical plate and the front and rear vertical plates requires more vertically installed connecting ribs, which further enhance the bending resistance. More importantly, this technical solution incorporates an anti-bending box girder, which increases the vertical height to form... The second-level anti-bending and anti-sinking structure, especially its front and rear side plates which are vertically oriented, significantly enhances bending resistance. Finally, the prestressed tensioning components form the third level of anti-bending and anti-sinking structure. By pre-applying tensile stress, it preemptively compensates for potential sinking forces caused by the subsequent installation of components such as the sliding platform, ram, and power head, ensuring the beam is less prone to sinking. Furthermore, the asymmetrical arrangement of the box girder near the front maximizes bending resistance in the front region of the beam without excessively increasing weight, as this is the area where the sliding platform, ram, and power head are installed, making it the area with the highest weight concentration. Compared to existing technologies, this solution increases the weight of the beam, but it significantly enhances its anti-bending and anti-sinking capabilities, thereby improving the overall stiffness of the beam. It exhibits superior bending, torsional, and seismic resistance, significantly improving the machining accuracy of the gantry machining center.
[0007] Based on the above scheme, the following further improvement is made: the thickness of the bottom side plate is greater than the thickness of the front and rear side plates. Since the bottom side plate is the main tension plate that bears the sag of the crossbeam, increasing its thickness can improve the load-bearing capacity and bending resistance.
[0008] Based on the above scheme, the following improvements are made: the front side plate and the front vertical plate are staggered in the front-rear direction, and the front side plate is located below and in front of the front vertical plate. The front side plate and the front vertical plate are connected by a front inclined plate.
[0009] Based on the above scheme, the following improvements are made: both ends of the tension rod have threaded sections, and tension bolts are screwed onto the threaded sections.
[0010] Based on the above scheme, the following improvements are made: multiple weight-reducing holes are provided on the front side plate, front vertical plate, front inclined plate, and rear vertical plate.
[0011] Based on the above scheme, the following improvements are made: the two ends of the rear vertical plate and the reinforcing vertical plate are connected by triangular stiffeners.
[0012] Based on the above scheme, further improvements are made as follows: the bending box girder and the crossbeam body are cast as a single piece. Attached Figure Description
[0013] Figure 1 This is a front three-dimensional structural diagram of a specific embodiment of the anti-bending crossbeam of the bridge-type gantry machining center of this utility model. Figure 2 for Figure 1 Corresponding rear three-dimensional structure diagram; Figure 3 for Figure 2 Corresponding upper three-dimensional structure diagram; Figure 4 for Figure 1 The main view; Figure 5 for Figure 4 Sectional view at point AA; Figure 6 for Figure 1 Top view; Figure 7 This is the front view of the prestressed jacking mechanism; In the diagram: 1-Crossbeam body, 11-Front vertical plate, 12-Rear vertical plate, 13-Reinforcing vertical plate, 14-Top plate, 15-Bottom plate, 16-Guide rail, 17-Connecting rib, 18-Bending box girder, 181-Front side plate, 182-Rear side plate, 183-Bottom side plate, 184-Bottom inclined plate, 185-Front inclined plate, 19-Weight reduction hole, 110-Triangular rib plate, 2-Prestressed tensioning assembly, 21-Tensioning seat, 22-Tensioning rod, 221-Threaded section, 23-Tensioning nut, 3-Prestressed jacking mechanism, 31-Pulling seat, 32-Pulling rod, 33-Pulling nut, 34-Installation strip. Detailed Implementation
[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0016] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0017] The features and performance of this utility model will be further described in detail below with reference to the embodiments.
[0018] A specific embodiment of the anti-bending crossbeam of the bridge-type gantry machining center of this utility model: as follows Figure 1-7 As shown, the anti-bending beam of the bridge-type gantry machining center includes a beam body 1. The beam body 1 includes parallel front and rear vertical plates. The upper and lower sides of the front and rear vertical plates are connected by a top plate 14 and a bottom plate 15, respectively. Guide rails 16 for sliding of the slide table are installed on the front vertical plate 11 and the top plate 14. A reinforcing vertical plate 13 is provided between the front and rear vertical plates. The upper and lower sides of the reinforcing vertical plate 13 are connected to the top plate 14 and the bottom plate 15, respectively. The reinforcing vertical plate 13 is connected to the front vertical plate 11 by vertically arranged connecting ribs 17 on a multi-layered plate surface. The reinforcing vertical plate 13 is connected to the rear vertical plate 12 by vertically arranged connecting ribs 17 on a single layer of plate surface. A bending-resistant box girder 18 is provided in the area below the front vertical plate 11 and the strong vertical plate 13. The bending-resistant box girder 18 has a trapezoidal structure with a larger top and a smaller bottom, including a front side plate 181, a rear side plate 182, a bottom side plate 183, and a bottom inclined plate 184. The front and rear side plates are parallel to the front vertical plate 11, the bottom side plate 183 is parallel to the bottom plate 15, and one end of the bottom inclined plate 184 is connected to the bottom side plate 183 and the other end is connected to the bottom plate 15. The bottom and rear sides of the bending-resistant box girder 18 are respectively provided with prestressed tensioning components 2. The prestressed tensioning components 2 include tensioning seats 21 that are symmetrically fixed relative to the bending-resistant box girder 18 and tensioning rods 22 for tensioning between the two tensioning seats 21.
[0019] The thickness of the bottom side plate 183 is greater than that of the front and rear side plates. Since the bottom side plate 183 is the main tension plate bearing the sag of the crossbeam, increasing its thickness improves its load-bearing capacity and bending resistance. The front side plate 181 and the front vertical plate 11 are staggered in the front-rear direction, with the front side plate 181 located below and in front of the front vertical plate 11. The front side plate 181 and the front vertical plate 11 are connected by a front inclined plate 185. The tension rod 22 has threaded sections 221 at both ends, with tension bolts screwed onto these sections. Multiple spaced weight-reducing holes 19 are provided on the front side plate 181, the front vertical plate 11, the front inclined plate 185, and the rear vertical plate 12. The rear vertical plate 12 is connected to the reinforcing vertical plate 13 at both ends by triangular stiffeners 110. The bending box girder 18 is integrally cast with the crossbeam body 1.
[0020] A prestressed jacking mechanism 3 is installed on the top plate 14. The prestressed jacking mechanism 3 includes jacking seats 31 symmetrically arranged in the left and right directions relative to the top plate 14. An installation strip 34 is installed between the two jacking seats 31. The installation strip 34 has a threaded hole. Two symmetrical jacking rods 32 are rotatably assembled in the threaded hole. Jacking nuts 33 are fixed at both ends of the jacking rods 32. The axial position of the jacking rods 32 is adjusted by screwing the jacking nuts 33, thereby applying a thrust to the two jacking seats 31 respectively. The jacking seats 31 apply the thrust to the top plate 14, thereby preventing the crossbeam from sinking by applying the thrust in advance.
[0021] When using the anti-bending beam of the bridge-type gantry machining center, due to the weight of the beam itself, as well as the weight of components such as the slide, ram, and power head, and the relatively long length of the beam, the middle of the beam tends to sag. This technical solution adds a reinforcing vertical plate 13 to the traditional double-layer vertical plate. The strong horizontal bending resistance of the vertical plate achieves the first level of anti-sag. Furthermore, the connection between the reinforcing vertical plate 13 and the front and rear vertical plates requires more vertically arranged connecting ribs 17, which further enhance the bending resistance. More importantly, this technical solution incorporates an anti-bending box girder 18, which increases the vertical height to form the second level of anti-bending effect. The secondary bending and anti-sinking structure, especially with its front and rear side plates having a certain vertical height, significantly improves bending resistance. Finally, the prestressed tensioning assembly 2 forms a tertiary bending and anti-sinking structure. By pre-applying tensile stress, it preemptively compensates for potential sinking forces caused by the subsequent installation of components such as the sliding platform, ram, and power head, ensuring the beam is less prone to sinking. Furthermore, the asymmetrical arrangement of the bending box girder 18 near the front maximizes the bending resistance of the front area of the beam without excessively increasing weight, as the front of the beam houses the sliding platform, ram, and power head, making it the area with the highest weight concentration. Compared to existing technologies, this solution increases the weight of the beam, but significantly enhances its bending and anti-sinking capabilities, thereby improving the overall stiffness of the beam. It exhibits superior bending, torsional, and seismic resistance, significantly improving the machining accuracy of the gantry machining center.
[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.
Claims
1. A bridge-type gantry machining center's anti-bending crossbeam, comprising a crossbeam body, the crossbeam body including parallel front and rear vertical plates, the upper and lower sides of the front and rear vertical plates being connected by a top plate and a bottom plate respectively, and guide rails for sliding a slide table being installed on the front vertical plate and the top plate, characterized in that... A reinforcing vertical plate is provided between the front and rear vertical plates. The upper and lower sides of the reinforcing vertical plate are connected to the top plate and the bottom plate, respectively. The reinforcing vertical plate is connected to the front vertical plate by vertically arranged connecting ribs on multiple layers of the plate surface. The reinforcing vertical plate is connected to the rear vertical plate by vertically arranged connecting ribs on a single layer of the plate surface. A bending box girder is provided in the corresponding lower area between the reinforcing vertical plate and the front vertical plate. The bending box girder has a trapezoidal structure that is larger at the top and smaller at the bottom, including a front side plate, a rear side plate, a bottom side plate, and a bottom inclined plate. The front and rear side plates are parallel to the front vertical plate, and the bottom side plate is parallel to the bottom plate. One end of the bottom inclined plate is connected to the bottom side plate, and the other end is connected to the bottom plate. Prestressed tensioning components are provided on the bottom and rear sides of the bending box girder. The prestressed tensioning components include tensioning seats that are symmetrically fixed relative to the bending box girder and tensioning rods for tensioning between the two tensioning seats.
2. The anti-bending crossbeam of the bridge-type gantry machining center according to claim 1, characterized in that, The thickness of the bottom side plate is greater than the thickness of the front and rear side plates.
3. The anti-bending crossbeam of the bridge-type gantry machining center according to claim 1, characterized in that, The front side panel and the front vertical panel are staggered in the front-rear direction, with the front side panel located below and in front of the front vertical panel. The front side panel and the front vertical panel are connected by a front inclined plate.
4. The anti-bending crossbeam of the bridge-type gantry machining center according to claim 1, characterized in that, The tension rod has threaded sections at both ends, and tension bolts are screwed onto the threaded sections.
5. The anti-bending crossbeam of the bridge-type gantry machining center according to claim 3, characterized in that, Multiple weight-reducing holes are provided at intervals on the front side plate, front vertical plate, front inclined plate, and rear vertical plate.
6. The anti-bending crossbeam of the bridge-type gantry machining center according to claim 1, characterized in that, The rear vertical plate and the reinforcing vertical plate are connected at both ends by triangular stiffeners.
7. The anti-bending crossbeam of the bridge-type gantry machining center according to claim 1, characterized in that, The bending-resistant box girder and the crossbeam body are cast as a single piece.