Bridge type gantry machining center prestressed pushing bending resistant crossbeam

Abstract

The utility model relates to a bridge type gantry machining center prestress pushing bending resistance crossbeam, solve the problem that the middle of crossbeam is easy to sink to influence machining accuracy. Crossbeam body includes the front, rear vertical board of parallel setting, the upper and lower two sides of front, rear vertical board are connected through the roof and the bottom respectively, be equipped with a layer of reinforcing vertical board between front, rear vertical board, the upper and lower two sides of reinforcing vertical board are connected with roof and bottom respectively, reinforcing vertical board and front vertical board are connected through the connecting rib of multilayer board surface vertical setting, reinforcing vertical board and rear vertical board are connected through the connecting rib of a layer of board surface vertical setting, the roof of top of reinforcing vertical board and front vertical board between the upper place is equipped with prestress pushing mechanism, and prestress pushing mechanism includes two pushing seats of symmetrical setting in the roof along left and right directions, and is equipped with pushing rod between two pushing seats, and pushing rod can contract and expand along the length direction to realize the pushing cooperation with two pushing seats to push the prestress of roof along left and right directions.

Description

Technical Field

[0001] This utility model relates to a prestressed jacking and bending-resistant crossbeam for 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 prestressed jacking anti-bending 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 prestressed jacking and bending-resistant crossbeam for a bridge-type gantry machining center includes a crossbeam body, which 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 a 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 plate surface. The reinforcing vertical plate is connected to the rear vertical plate by vertically arranged connecting ribs on a single layer of plate surface. A prestressed jacking mechanism is provided on the top plate above the reinforcing vertical plate and the front vertical plate. The prestressed jacking mechanism includes two jacking seats symmetrically arranged in the left and right direction on the top plate. A jacking rod is provided between the two jacking seats. The jacking rod can extend and retract along the length direction to achieve jacking cooperation with the two jacking seats, so as to apply prestressed jacking in the left and right direction to the top plate.

[0006] Based on the above scheme, the following improvements are made: an installation strip is provided between the two push seats, the installation strip is fixedly installed on the top plate, the installation strip has a guide hole corresponding to the push rod, the outer end of the guide hole has an internal thread hole, the push rod has a corresponding external thread section, and the end of the push rod is fixed with a push nut.

[0007] Based on the above scheme, the following improvements are made: the two pusher seats are cast integrally with the top plate.

[0008] Based on the above scheme, the following improvements are made: the push rods include two sets arranged in parallel, and each set includes two rods arranged coaxially.

[0009] Based on the above scheme, further improvements are made as follows: a prestressing tensioning mechanism is provided on the base plate, which includes two tensioning seats symmetrically fixed on the base plate and a tensioning rod tensioning between the two tensioning seats.

[0010] The beneficial effects of this application are as follows: Due to the weight of the crossbeam itself, as well as the weight of components such as the slide, ram, and power head, and the relatively long length of the crossbeam, there is a tendency for the middle of the crossbeam to sink. This technical solution adds a reinforcing vertical plate to the traditional double-layer vertical plate, utilizing the strong bending resistance of the vertical plate in the horizontal direction to achieve the first level of anti-sinking. Furthermore, the connection between the reinforcing vertical plate and the front and rear vertical plates requires more vertically arranged connecting ribs on the plate surface, which have a further bending resistance effect. More importantly, the setting of the prestressed jacking mechanism can pre-apply prestress to both sides on the top plate so that when the crossbeam has a tendency to sink later, this pre-applied prestress can be used to offset it, thereby achieving the purpose of preventing the crossbeam from sinking. Attached Figure Description

[0011] Figure 1 This is a front three-dimensional structural diagram of a specific embodiment of the prestressed jacking and bending-resistant crossbeam of a bridge-type gantry machining center according to the present invention; 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

[0012] 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.

[0013] 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.

[0014] 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.

[0015] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0016] A specific embodiment of the prestressed jacking and bending-resistant crossbeam of the bridge-type gantry machining center of this utility model is as follows: Figure 1-7As shown, a prestressed jacking and bending-resistant crossbeam for a bridge-type gantry machining center includes a crossbeam body 1. The crossbeam 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 a 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 also connected to the rear vertical plate 12 by vertically arranged connecting ribs 17 on a multi-layered plate surface. A bending-resistant box girder 18 is provided in the area below the connection between the reinforcing vertical plate 13 and the front vertical plate 11. The bending-resistant box girder 18 has a trapezoidal structure that is larger at the top and smaller at the 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.

[0017] A prestressed jacking mechanism 3 is provided on the top plate 14 above the reinforcing vertical plate 13 and the front vertical plate 11. The prestressed jacking mechanism 3 includes two jacking seats 31 symmetrically arranged in the left-right direction on the top plate 14. A jacking rod 32 is provided between the two jacking seats 31. The jacking rod 32 can extend and retract along its length to achieve jacking engagement with the two jacking seats 31, so as to apply jacking prestress to the top plate 14 in the left-right direction. An installation strip 34 is provided between the two jacking seats 31. The installation strip 34 is fixedly installed on the top plate 14. The installation strip 34 has a guide hole corresponding to the jacking rod 32. The outer end of the guide hole has a section of internal thread. The jacking rod 32 has a corresponding section of external thread. A jacking nut 33 is fixed to the end of the jacking rod 32. The two jacking seats 31 are integrally cast with the top plate 14. The jacking rod 32 includes two sets arranged in parallel, each set including two coaxial rods.

[0018] 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.

[0019] 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.

[0020] In other embodiments, no bending box girder is provided at the bottom of the crossbeam, and the prestressed tensioning mechanism is directly set on the base plate.

[0021] In the use of a prestressed jacking anti-bending beam for a bridge-type gantry machining center, the beam's own weight, along with the weight of components such as the slide, ram, and power head, and the beam's relatively long length, cause a tendency for the middle of the beam to sink. This technical solution addresses this by adding a reinforcing vertical plate 13 to the traditional double-layer vertical plate. The strong horizontal bending resistance of the vertical plate provides the first level of anti-sinking protection. 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. This forms the second level of bending and anti-sinking structure, especially since its front and rear side plates are vertically oriented, significantly improving bending resistance. Finally, the prestressed tensioning assembly 2 forms the third level of 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 prestressed jacking and bending-resistant crossbeam for a bridge-type gantry machining center, 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 of 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 the multi-layer plate surface. The reinforcing vertical plate is connected to the rear vertical plate by vertically arranged connecting ribs on the single layer plate surface. A prestressed jacking mechanism is provided on the top plate above the reinforcing vertical plate and the front vertical plate. The prestressed jacking mechanism includes two jacking seats symmetrically arranged in the left and right direction on the top plate. A jacking rod is provided between the two jacking seats. The jacking rod can extend and retract along the length direction to achieve jacking cooperation with the two jacking seats, so as to apply jacking prestress in the left and right direction to the top plate.

2. The prestressed jacking and bending-resistant crossbeam of a bridge-type gantry machining center according to claim 1, characterized in that, An installation strip is provided between the two push rods. The installation strip is fixedly installed on the top plate. The installation strip has a guide hole corresponding to the push rod. The outer end of the guide hole has an internal threaded hole. The push rod has a corresponding external threaded section. The end of the push rod is fixed with a push nut.

3. The prestressed jacking and bending-resistant crossbeam of a bridge-type gantry machining center according to claim 1, characterized in that, The two pushers are cast integrally with the top plate.

4. The prestressed jacking and bending-resistant crossbeam of a bridge-type gantry machining center according to claim 2, characterized in that, The push rods consist of two sets arranged side by side, each set consisting of two rods arranged coaxially.

5. The prestressed jacking and bending-resistant crossbeam of a bridge-type gantry machining center according to claim 1, characterized in that, The base plate is equipped with a prestressing tensioning mechanism, which includes two tensioning seats symmetrically fixed on the base plate and a tensioning rod tensioning between the two tensioning seats.

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