Horizontal machining center movable cross beam

Abstract

A horizontal machining center movable cross beam comprises a steel pipe base, first and second bearing steel pipes, a screw rod, a driving device and a steel pipe frame, the first and second bearing steel pipes are horizontally welded on one side of the steel pipe base and arranged side by side, the steel pipe frame is located on the other side of the steel pipe base and comprises a first connecting steel pipe, a second connecting steel pipe, a third connecting steel pipe and a first steel pipe frame body and a second steel pipe frame body with openings, two ends of the first connecting steel pipe are respectively welded with the first steel pipe frame body, the third connecting steel pipe and the steel pipe base, and two ends of the second connecting steel pipe are respectively welded with the second steel pipe frame body, the third connecting steel pipe and the steel pipe base. Compared with the prior art, the movable cross beam can improve the torsional resistance on the basis of ensuring the strength and rigidity of the movable cross beam, and further improve the machining precision.

Description

Technical Field

[0001] This invention relates to the field of horizontal CNC machine tool design technology, specifically to a moving crossbeam of a horizontal machining center. Background Technology

[0002] Currently, most of the existing horizontal machining centers with moving beams use cast iron for their crossbeams, which makes quality defect control quite difficult. In addition, the cast iron crossbeams have a large mass, resulting in a low operating response speed during equipment operation, which does not meet the needs of some current high-speed machining.

[0003] In addition, under the weight of the moving crossbeam itself and the load of the front spindle component, the moving crossbeam itself deforms. For example, it may deform due to insufficient rigidity and insufficient torsional resistance. For example, in equipment that uses a tilting milling head component for machining, since the tilting milling head component is located on one side of the moving crossbeam, and under the gravity of both, the moving crossbeam is subjected to asymmetrical forces. The moving crossbeam is very prone to bending and twisting, which leads to deformation of the moving crossbeam. This not only reduces the smoothness of the movement of the tilting milling head component, thereby reducing the machining effect, but also reduces the machining accuracy of the tilting milling head component. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a moving crossbeam for a horizontal machining center.

[0005] To achieve the above objectives, the present invention discloses a moving crossbeam of a horizontal machining center, including a steel pipe base, wherein the steel pipe base is provided with the following components:

[0006] The first and second bearing steel pipes are horizontally welded to one side of the steel pipe seat and arranged side by side. The sides of the first and second bearing steel pipes away from the steel pipe seat are both welded to a slide rail, which is used to slide and connect the processing device.

[0007] A lead screw and a drive device are provided. The lead screw is mounted on a steel pipe seat and is located on the same side between the first bearing steel pipe and the second bearing steel pipe. The drive device is used to drive the lead screw to rotate, thereby moving the processing device.

[0008] A steel pipe frame includes a first connecting steel pipe, a second connecting steel pipe, a third connecting steel pipe, and a first steel pipe frame body and a second steel pipe frame body with openings. One end of the first connecting steel pipe is welded to the first steel pipe frame body, and the other end of the first connecting steel pipe is welded to one end of the third connecting steel pipe and to a position on the steel pipe seat opposite to the first bearing steel pipe. One end of the second connecting steel pipe is welded to the second steel pipe frame body, and the other end of the second connecting steel pipe is welded to the other end of the third connecting steel pipe and to a position on the steel pipe seat opposite to the second bearing steel pipe. The two ends of the opening of the first steel pipe frame body are welded to the other side of the steel pipe seat and to a position opposite to the first bearing steel pipe. The two ends of the opening of the second steel pipe frame body are welded to the other side of the steel pipe seat and to a position opposite to the second bearing steel pipe.

[0009] Preferably, the two ends of the opening of the first steel pipe frame correspond to the two ends of the first bearing steel pipe, and at least one of the third connecting steel pipes is located in the middle position near the steel pipe seat.

[0010] Preferably, the top view projection of the first steel pipe frame is C-shaped.

[0011] More preferably, the first steel pipe frame includes a horizontal steel pipe located in the middle, inclined steel pipes welded to both sides of the horizontal steel pipe, and a fourth connecting steel pipe welded to the end of the inclined steel pipe away from the horizontal steel pipe. The end of the fourth connecting steel pipe away from the inclined steel pipe is welded to a steel pipe seat, and the length of the fourth connecting steel pipe is less than the distance between the other side of the steel pipe seat and the horizontal steel pipe.

[0012] In a further preferred embodiment, the top surface of the first steel pipe frame is flush with the top surface of the steel pipe seat, and a first reinforcing bar is welded across the top surface of the fourth connecting steel pipe and the steel pipe seat.

[0013] More preferably, at least one fifth connecting steel pipe is welded between the horizontal steel pipe and the second steel pipe frame.

[0014] More preferably, there are multiple fifth connecting steel pipes, and the multiple fifth connecting steel pipes are welded to a position close to the horizontal steel pipe.

[0015] Preferably, the spacing between two adjacent third connecting steel pipes is 378–383 mm.

[0016] Preferably, the thickness of both the first and second bearing steel pipes is 2 to 8 mm.

[0017] Preferably, a second reinforcing bar is provided between the steel pipe seat and the first and / or second bearing steel pipe.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The steel pipe base, first bearing steel pipe, second bearing steel pipe and steel pipe frame of the present invention are all made of hollow steel pipe material. This reduces the overall mass of the structure while ensuring the strength and rigidity of the overall structure of the moving crossbeam. When the moving crossbeam is installed on the processing equipment, it is beneficial to improve the processing response speed of the structure connected to the moving crossbeam, so that the processing equipment can be used for high-speed processing equipment and improve the applicability of the processing equipment.

[0020] The steel pipes are mounted on the side opposite to the first and second bearing steel pipes on the steel pipe base. The steel pipe support acts on the first and second bearing steel pipes through the steel pipe base, so that the first and second bearing steel pipes form a relatively uniform structure and a relatively uniform stress field distribution, thereby improving the torsional resistance of the first and second bearing steel pipes and effectively alleviating the torsional deformation of the first and second bearing steel pipes. This is conducive to improving the smoothness of the movement of the processing device and the processing accuracy.

[0021] A third connecting steel pipe is installed between the first and second steel pipe frames. The two ends of the third connecting steel pipe are not only used to connect the first and second steel pipe frames, making the overall structure of the steel pipe frame more stable, but also to provide auxiliary support for the first and second load-bearing steel pipes, improving their strength and rigidity, which is conducive to improving the smoothness of the movement of the processing device and the processing accuracy. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the moving crossbeam of the horizontal machining center of the present invention (including the machining device);

[0023] Figure 2 This is a schematic diagram of the structure of the moving crossbeam of the horizontal machining center of the present invention;

[0024] Figure 3 This is a schematic diagram of the steel pipe frame structure;

[0025] Steel pipe seat 1;

[0026] First load-bearing steel pipe 2;

[0027] Second load-bearing steel pipe 3;

[0028] Lead screw 4;

[0029] Processing device 5;

[0030] Steel pipe frame 6; First connecting steel pipe 61; Second connecting steel pipe 62; Third connecting steel pipe 63; First steel pipe frame body 64; Horizontal steel pipe 641; Diagonal steel pipe 642; Fourth connecting steel pipe 643; Second steel pipe frame body 65; Fifth connecting steel pipe 66;

[0031] Slide rail 7;

[0032] First slab reinforcement 8;

[0033] Second reinforcement bar 9. Detailed Implementation

[0034] In the description of this invention, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of the different embodiments or examples, without contradiction.

[0037] The following is in conjunction with the appendix Figure 1-3 The technical solution of the present invention will be further described below.

[0038] In this embodiment, the horizontal machining center moving crossbeam of the present invention is used in a horizontal machine tool. The horizontal machine tool includes a worktable and a gantry structure. The gantry structure includes two columns and a moving crossbeam. The bottoms of the two columns are slidably mounted on the worktable, and the tops of the two columns are fixed to the moving crossbeam, which is horizontally positioned at the top of the columns. A machining device 5 (such as a tilting milling head component) is mounted on the moving crossbeam, and the machining device is located on one side of the moving crossbeam. Under operating conditions, the gantry structure is driven to move on the worktable, and the machining device also moves on the moving crossbeam, thereby moving the machining device to the position where machining is required.

[0039] In this embodiment, a horizontal machining center moving crossbeam is described, see [link to previous section]. Figure 1-3The system includes a steel pipe base 1, on which a first supporting steel pipe 2, a second supporting steel pipe 3, a lead screw 4, a drive device, and a steel pipe frame are mounted. The steel pipe base 1 has a square front view projection. The first supporting steel pipe 2 and the second supporting steel pipe 3 are of the same specifications and are horizontally welded to the top and bottom of the same side of the steel pipe base 1 (referred to as the front side; the opposite side is the rear side). Slide rails 7 are welded to the sides of both the first supporting steel pipe 2 and the second supporting steel pipe 3 away from the steel pipe base 1, and the slide rails 7 are used for sliding connection of the processing device. The steel pipe base 1 also has a bearing seat and a bearing mounted on the bearing seat. The lead screw 4 is connected to the front side of the steel pipe base 1 through the bearing seat and the bearing, and is located between the first supporting steel pipe 2 and the second supporting steel pipe 3. The drive device is preferably a motor. Under operating conditions, the motor drives the lead screw 4 to rotate, and the lead screw 4 drives the processing device to move left and right. The steel pipe frame 6 includes a first connecting steel pipe 61, a second connecting steel pipe 62, a third connecting steel pipe 63, and a first steel pipe frame body 64 and a second steel pipe frame body 65 with openings. One end of the first connecting steel pipe 61 is welded to the first steel pipe frame body 64, and the other end of the first connecting steel pipe 61 is welded to one end of the third connecting steel pipe 63, at a position on the rear side of the steel pipe seat 1 opposite to the first supporting steel pipe 2. One end of the second connecting steel pipe 62 is welded to the second steel pipe frame body 65, and the other end of the second connecting steel pipe 62 is welded to the other end of the third connecting steel pipe 63, at a position on the rear side of the steel pipe seat 1 opposite to the second supporting steel pipe 3. The two ends of the opening of the first steel pipe frame body 64 are respectively welded to the rear side of the steel pipe seat 1 at a position opposite to the first supporting steel pipe 2. The two ends of the opening of the second steel pipe frame body 65 are welded to the rear side of the steel pipe seat 1 at a position opposite to the second supporting steel pipe 3. In this embodiment, the above-mentioned steel pipe structures are all welded from square steel pipes.

[0040] The moving crossbeam of this invention, including its steel pipe base 1, first bearing steel pipe 2, second bearing steel pipe 3, and steel pipe frame, all utilize hollow steel pipe materials. This ensures the overall strength and rigidity of the moving crossbeam while reducing the mass of the gantry structure. When the moving crossbeam is installed on the columns of the gantry structure, it improves the processing response speed between the gantry structure and the worktable, enabling the horizontal machine tool to be used with high-speed processing equipment and expanding the applicability of the processing equipment. The steel pipes are mounted on the side opposite to the first and second bearing steel pipes on the steel pipe base 1. The steel pipe frame acts on the first and second bearing steel pipes through the steel pipe base 1, resulting in a relatively uniform structure and stress field distribution among the first and second bearing steel pipes. This improves the torsional resistance of the first and second bearing steel pipes and effectively alleviates their torsional deformation, which helps improve the smoothness of the processing device's movement and processing accuracy. A third connecting steel pipe 63 is set between the first steel pipe frame 64 and the second steel pipe frame 65. The two ends of the third connecting steel pipe 63 are not only used to connect the first and second steel pipe frames, making the overall structure of the steel pipe frame more stable, but also to provide auxiliary support for the first and second load-bearing steel pipes, improving the strength and rigidity of the first and second load-bearing steel pipes. This is beneficial to improving the smoothness of the movement and processing accuracy of the processing device, and can also increase the natural frequency of the structure, making it less prone to resonance during operation.

[0041] See Figure 1-3 The left and right ends of the first steel pipe frame 64 are located near the left and right ends of the first bearing steel pipe 2, and the left and right ends of the second steel pipe frame are located near the left and right ends of the second bearing steel pipe. At least one third connecting steel pipe 63 is located near the middle position of the steel pipe seat 1. On the moving crossbeam, since the strength and rigidity of the ends of the first and second bearing steel pipes are higher than those of the middle position, the two ends of the steel pipe frame (i.e., the two ends of the first and second steel pipe frames) are welded to the steel pipe seat 1 at positions opposite to the ends of the first and second bearing steel pipes. This ensures that most of the weight of the steel pipe frame is transferred to the ends of the first and second bearing steel pipes through the steel pipe seat 1, and a small portion is transferred to the middle position of the first and second bearing steel pipes through the third connecting steel pipe 63 via the steel pipe seat 1, thus ensuring...

[0042] The rigidity of the first and second load-bearing steel pipes is increased, thereby improving their bending resistance and effectively alleviating their bending deformation. This is beneficial for further improving the smoothness of the processing device's movement and the processing accuracy.

[0043] See Figure 1-3The top view projection of the first steel pipe frame 64 and the second steel pipe frame 65 is C-shaped. The structures of the first steel pipe frame 64 and the second steel pipe frame 65 are the same. Specifically, taking the first steel pipe frame 64 as an example, the first steel pipe frame 64 includes a horizontal steel pipe 641 located in the middle, inclined steel pipes 642 welded to the left and right sides of the horizontal steel pipe 641, and a fourth connecting steel pipe 643 welded to the end of the inclined steel pipe 642 away from the horizontal steel pipe 641. The end of the fourth connecting steel pipe 643 away from the inclined steel pipe 642 is welded to the rear side of the steel pipe seat 1. The length of the fourth connecting steel pipe 643 is less than the distance between the rear side of the steel pipe seat 1 and the horizontal steel pipe 641. The steel pipe base 1 is designed as a C-shaped structure, and the space between the first steel pipe frame 64 and the rear side of the steel pipe base 1 is hollow. This not only reduces the overall weight and improves the processing response speed of the gantry structure, but also ensures that the first steel pipe frame 64 can act on the first bearing steel pipe 2, so that the first bearing steel pipe 2 forms a relatively uniform structure and a relatively uniform stress field distribution, thereby improving the torsional resistance of the first bearing steel pipe 2 and improving the smoothness of the movement of the processing device and the processing accuracy.

[0044] See Figure 1-3 The top surface of the first steel pipe frame 64 is flush with the top surface of the steel pipe seat 1. A first reinforcing bar 8 is welded across the top surfaces of the fourth connecting steel pipe 643 and the steel pipe seat 1. The first reinforcing bar 8 located on the top surfaces of the fourth connecting steel pipe 643 and the steel pipe seat 1 is located at the left and right ends of the moving crossbeam. This improves the torsional resistance of the moving crossbeam. At the same time, placing the first reinforcing bar 8 at this position also avoids its weight reducing the rigidity and bending resistance of the first load-bearing steel pipe 2.

[0045] See Figure 1-3At least one fifth connecting steel pipe 66 is welded between the horizontal steel pipe 641 of the first steel pipe frame 64 and the horizontal steel pipe 641 of the second steel pipe frame 65 to connect the two. In this embodiment, there are three fifth connecting steel pipes 66, all of which are used to connect the horizontal steel pipes 641 of the first and second steel pipe frames and are arranged vertically. By setting the fifth connecting steel pipes 66 between the horizontal steel pipe 641 and the second steel pipe frame 65, not only are the horizontal steel pipe 641 and the second steel pipe frame 65 connected, that is, the first steel pipe frame 64 and the second steel pipe frame 65 are connected. This not only improves the overall structural stability of the steel pipe frame, but also ensures that the steel pipe frame can provide sufficient torque, so that the load-bearing steel pipe and the steel pipe frame have a more uniform stress field distribution, thus improving its torsional resistance. Furthermore, the spacing between two adjacent third connecting steel pipes 63 is 378–383 mm. The third connecting steel pipes 63 not only provide sufficient torque, improving the torsional resistance of the first and second load-bearing steel pipes, but also reduce the overall mass of the steel pipe frame, effectively minimizing the impact of the steel pipe frame on the rigidity of the first and second load-bearing steel pipes. In addition, this distance facilitates welding of the third connecting steel pipes 63, avoiding the inability to fully weld the welding surfaces due to insufficient space.

[0046] See Figure 1-3 In the moving crossbeam of this invention, the weight of the processing device mainly acts on the first and second bearing steel pipes. Therefore, the strength, bending resistance, and torsional resistance of the first and second bearing steel pipes are significantly affected, making them prone to deformation and reducing the movement and processing accuracy of the processing device. Based on this, finite element simulations of the first and second bearing steel pipes with different thicknesses revealed the following (specific simulation parameters are shown in Table 1): First, as the wall thickness of either the first bearing pipe 2 or the second bearing pipe 3 increases, the structural stiffness increases, but the rate of increase decreases. Second, when the wall thickness of the first bearing pipe 2 is small, the wall thickness of the second bearing pipe 3 has little impact on the overall structural deformation and stress. However, appropriately increasing the wall thickness of both the first and second bearing pipes can effectively reduce structural stress, which is better than simply increasing the wall thickness of the second bearing pipe. Considering overall structural quality control, the wall thickness of the first bearing pipe 2 is selected as 8mm, and the wall thickness of the second bearing pipe 3 is selected as 3mm. 8mm is a manufacturing limitation; 2mm steel pipes are difficult to weld and more prone to welding defects.

[0047] Table 1: Simulation data of first and second load-bearing steel pipes with different wall thicknesses

[0048]

[0049]

[0050] See Figure 1-3There are multiple third connecting steel pipes 63, preferably three in this embodiment. The three third connecting steel pipes 63 are spaced apart and opposite to the fifth connecting steel pipe 66. The fifth connecting steel pipe 66 connects the first and second steel pipe frames, which not only improves the stability of the overall structure formed by the two, but also, the fifth connecting steel pipe 66 is connected to the steel pipe seat 1, which further improves the strength and torsional performance of the steel pipe seat 1. The strength and torsional performance of the first and second bearing steel pipes are further improved through the steel pipe seat 1.

[0051] See Figure 1-3 The steel pipe seat 1 is provided with a second rib 9 at an interval between it and the first bearing steel pipe 2 and / or the second bearing steel pipe, which further improves the torsional strength of the first and second bearing steel pipes.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A horizontal machining center moving crossbeam, characterized by, The steel pipe seat is provided with the following components: The first and second bearing steel pipes are horizontally welded to one side of the steel pipe seat and arranged side by side, and the side away from the steel pipe seat of the first and second bearing steel pipes is welded to the slide rail used for slidingly connecting the processing device; The screw rod is arranged on the steel pipe seat and on the same side between the first and second bearing steel pipes, and the driving device is used for driving the screw rod to rotate so as to drive the processing device to move; The steel pipe frame comprises a first connecting steel pipe, a second connecting steel pipe, a third connecting steel pipe, a first steel pipe frame body and a second steel pipe frame body with openings, one end of the first connecting steel pipe is welded to the first steel pipe frame body, the other end of the first connecting steel pipe is welded to one end of the third connecting steel pipe and a position on the steel pipe seat opposite to the first bearing steel pipe, one end of the second connecting steel pipe is welded to the second steel pipe frame body, the other end of the second connecting steel pipe is welded to the other end of the third connecting steel pipe and a position on the steel pipe seat opposite to the second bearing steel pipe, both ends of the opening of the first steel pipe frame body are welded to the other side of the steel pipe seat and positions opposite to the first bearing steel pipe, and both ends of the opening of the second steel pipe frame body are welded to the other side of the steel pipe seat and positions opposite to the second bearing steel pipe; Both ends of the opening of the first steel pipe frame body correspond to the positions of both ends of the first bearing steel pipe, and at least one third connecting steel pipe is located close to the middle position of the steel pipe seat; The top view of the first steel pipe frame body is in the shape of C; The first steel pipe frame body comprises a horizontal steel pipe located at the middle position, inclined steel pipes welded to both sides of the horizontal steel pipe, and a fourth connecting steel pipe welded to the end of the inclined steel pipe away from the horizontal steel pipe, the end of the fourth connecting steel pipe away from the inclined steel pipe is welded to the steel pipe seat, and the length of the fourth connecting steel pipe is smaller than the distance between the other side of the steel pipe seat and the horizontal steel pipe; At least one fifth connecting steel pipe is welded between the horizontal steel pipe and the second steel pipe frame body; There are multiple fifth connecting steel pipes, and the multiple fifth connecting steel pipes are welded to positions close to the horizontal steel pipe.

2. The horizontal machining center dynamic crossbeam according to claim 1, characterized in that: The top surface of the first steel pipe frame body is flush with the top surface of the steel pipe seat, and the top surface of the fourth connecting steel pipe and the steel pipe seat is welded with a first plate bar crossing both.

3. The horizontal machining center dynamic crossbeam according to claim 1, characterized in that: The distance between two adjacent third connecting steel pipes is 378-383 mm.

4. The horizontal machining center dynamic crossbeam according to claim 1, characterized in that: The thickness of the first and second bearing steel pipes is 2-8 mm.

5. The horizontal machining center dynamic crossbeam according to claim 1, characterized in that: A second plate bar is arranged between the steel pipe seat and the first and / or second bearing steel pipes.

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