Multi-channel machine tool

Abstract

The invention provides a multi-channel machine tool which comprises a machine tool cross beam, at least two sliding seats and main shaft assemblies assembled on the sliding seats, a first guide rail is arranged on the top face of the machine tool cross beam, and the first guide rail extends in the length direction of the machine tool cross beam; the bottom end of each sliding seat is connected with the first guide rail in a sliding mode so that each sliding seat can be supported on the top face of the machine tool cross beam in a sliding mode, and each main shaft assembly can be connected to the side vertical face, close to one side of an operation area of the multi-channel machine tool, of each sliding seat in a lifting mode. On one hand, the overall rigidity of the machine tool can be remarkably improved, then the deformation resistance of the machine tool in the using process is improved, the machining precision of the machine tool is improved, and the perpendicularity in the Y-Z direction can be conveniently adjusted in the assembling process; and on the other hand, all the sliding seats share the same first guide rail, the top movement space of the machine tool cross beam can be effectively utilized, the width of the cross beam is shortened, compact layout is achieved, and meanwhile the multi-station machining function is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of machine tool design technology, and specifically relates to a multi-channel machine tool. Background Technology

[0002] In recent years, with the rapid iteration and upgrading of components in 3C electronic products (such as mobile phones and tablets) and new energy vehicles, the supporting processing industry has placed higher demands on precision manufacturing equipment, leading to a continuous increase in market demand for CNC drilling and tapping centers. However, traditional drilling and tapping equipment generally adopts a single-spindle structure, which can only process a single workpiece at a time. When faced with the need to process multiple varieties and small batches of the same type of parts, companies often need to deploy multiple machines to operate in parallel—taking three traditional drilling and tapping machines as an example, this not only occupies a large amount of factory space but also requires multiple operators, resulting in low equipment utilization, high labor costs, long production cycles, and overall efficiency that cannot meet the pace of modern intelligent manufacturing.

[0003] To address the aforementioned pain points, the three-channel drilling and tapping vertical machining center has emerged. Designed for the precision manufacturing field, this center integrates high-precision machining, high-efficiency production capacity, multi-axis linkage control, and an intelligent management system. Through X / Y / Z three-axis linkage technology, it achieves collaborative operation of "one machine, three workstations." A single unit can replace the functions of three traditional drilling and tapping machines. In a single setup, it can complete multiple precision processes such as milling, drilling, irregular hole machining, plane milling, chamfering, grooving, and tapping. It is particularly suitable for the efficient and complex machining of 3C precision components such as mobile phone frames, laptop shells, and structural parts. Multi-channel parallel machining equipment not only significantly improves machining cycle time and yield rate but also achieves a manufacturing upgrade from "single-point breakthrough" to "system integration," providing a solution for the high-flexibility and high-efficiency production needs of the intelligent manufacturing era.

[0004] The patent with publication number CN120734792A discloses a three-channel high-speed drilling and tapping center. This method simply assembles three machine tools independently on the same base and packages them into one machine tool. However, the independent channels cannot share the same stroke, and the structural size cannot be further compressed.

[0005] Patent CN107825226A discloses a three-channel engraving machine. The X-axis slide of the engraving machine is mounted on the machine tool crossbeam in a vertical wall-mounted manner. However, the vertical wall-mounted structure of the slide and spindle assembly makes the overall rigidity of the machine relatively weak. During the assembly process, it is not conducive to adjusting the perpendicularity of the YZ axis of the machine tool, that is, the perpendicularity of the Z-axis (e.g., the spindle box) movement path to the Y-axis (e.g., the worktable) movement path. Summary of the Invention

[0006] Therefore, the present invention provides a multi-channel machine tool that can overcome the shortcomings of related technologies, such as the insufficiently compact overall structure design of multi-channel machine tools and the vertical wall-mounted installation of the slide and spindle assembly on the machine tool crossbeam, which results in weak overall rigidity and makes it difficult to adjust the verticality of the machine tool in the YZ direction during assembly.

[0007] To address the aforementioned problems, the present invention provides a multi-channel machine tool, comprising a machine tool beam, at least two slides, and spindle assemblies assembled on each slide. A first guide rail is provided on the top surface of the machine tool beam, extending along the length of the machine tool beam. The bottom end of each slide is slidably connected to the first guide rail so that each slide is slidably supported on the top surface of the machine tool beam. Each spindle assembly is vertically connected to the side surface of each slide near the working area of ​​the multi-channel machine tool.

[0008] In some embodiments, the top surface of the machine tool beam is further provided with a second guide rail that is parallel and spaced apart from the first guide rail, and the bottom end of each slide is slidably connected to the second guide rail.

[0009] In some embodiments, the top surface of the machine tool beam has a first platform and a second platform, wherein the second platform is located on the side of the first platform away from the working area, and the height of the second platform is greater than the height of the first platform, the first guide rail is connected to the first platform, and the second guide rail is connected to the second platform.

[0010] In some embodiments, the height difference between the second guide rail and the first guide rail is h, the center distance between the second guide rail and the first guide rail is l, 0.15≤h / l≤0.8; and / or, the bottom end face of the slide has an upwardly extending notch in the area corresponding to the second platform.

[0011] In some embodiments, a linear motor stator is provided on the top surface of the machine tool beam, and a linear motor mover is connected to the bottom end face of each slide, with the linear motor stator located between the first guide rail and the second guide rail.

[0012] In some embodiments, the multi-channel machine tool further includes a bed, with each end of the machine tool crossbeam supported on the bed via a column, and the machine tool crossbeam and the column being integrally cast.

[0013] In some embodiments, multiple support columns are spaced apart on the top surface of the bed and the bottom end face of the machine tool beam, with each support column spaced between two columns.

[0014] In some embodiments, the bed is made of marble, and the machine tool beam and the column are made of cast iron; and / or, the machine tool beam has a first reinforcing rib, and the column has a second reinforcing rib, the shape of the first reinforcing rib is different from the shape of the second reinforcing rib, and the torsional and shear resistance of the first reinforcing rib is higher than that of the second reinforcing rib, and the bending and compressive resistance of the second reinforcing rib is higher than that of the first reinforcing rib.

[0015] In some embodiments, the side wall of the slide away from the work area is an inclined surface, and the inclined surface slopes from bottom to top towards the side of the work area.

[0016] In some embodiments, the slide includes a first vertical plate, a second vertical plate, and a third vertical plate arranged in parallel and spaced apart along the width direction of the first guide rail; a plurality of fourth vertical plates arranged in parallel and spaced apart along the length direction of the first guide rail; and a first horizontal plate, a second horizontal plate, and a third horizontal plate arranged in parallel and spaced apart along the height direction of the first guide rail. The first vertical plate, the second vertical plate, the third vertical plate, the fourth vertical plate, the first horizontal plate, the second horizontal plate, and the third horizontal plate are vertically and crosswise connected to form a truss structure, and the main shaft assembly is assembled on the side surface of the first vertical plate.

[0017] In some embodiments, each of the first vertical plate, second vertical plate, third vertical plate, fourth vertical plate, first horizontal plate, second horizontal plate, and third horizontal plate is provided with a weight-reducing hole that passes through the respective opposite side surfaces of the plate.

[0018] In some embodiments, the widths of the first horizontal plate, the second horizontal plate, and the third horizontal plate decrease from bottom to top in the width direction of the first guide rail, and the heights of the first vertical plate, the second vertical plate, and the third vertical plate decrease in the direction away from the work area.

[0019] In some embodiments, the spindle assembly includes a spindle and a spindle housing fitted radially outward therefrom, the spindle assembly being slidably connected to the slide via the spindle housing, the width of the cross-section of the spindle housing increasing in the direction away from the working area.

[0020] In some embodiments, the outer wall of the spindle box is provided with multiple box-body reinforcing ribs, and each of the box-body reinforcing ribs is arranged at intervals along the height of the spindle box.

[0021] The multi-channel machine tool provided by this invention has the following beneficial effects: On the one hand, the sliding supports of the multi-channel machine tool are mounted on the top surface of the machine tool beam in a sliding support manner, that is, the bullhead mounting support structure, compared with the wall-mounted connection method in the existing technology, can significantly improve the overall rigidity of the machine tool, thereby improving the machine tool's resistance to deformation during use, improving the machining accuracy of the machine tool, and facilitating the adjustment of the verticality of the machine tool in the Y and Z directions during assembly. On the other hand, the shared first guide rail of each sliding support can effectively utilize the top movement space of the machine tool beam, shorten the beam width, achieve a compact layout while ensuring multi-station machining functions. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the multi-channel machine tool in an embodiment of the present invention; Figure 2 yes Figure 1 A front view of a multi-channel machine tool; Figure 3 yes Figure 1 Left view of a multi-channel machine tool; Figure 4 yes Figure 3 A structural diagram with some components omitted. Figure 5 yes Figure 1 A three-dimensional structural diagram of the slide block; Figure 6 yes Figure 1 A three-dimensional structural diagram of the spindle box in the middle; Figure 7 yes Figure 6 Top view of the spindle box; Figure 8 yes Figure 1 A top view of the machine tool beam (top-mounted components). Figure 9 yes Figure 8 A schematic diagram of the structure of a machine tool beam without the linear motor stator assembled thereon; Figure 10 yes Figure 9 Cross-sectional view of AA in the middle; Figure 11 This is a comparison of the overall rigidity analysis (stress cloud diagram) of wall-mounted sliding arrangement (existing technology) and horizontal arrangement (this application) structures when subjected to loads in the X-axis direction. Figure 12 This is a comparison of the overall rigidity analysis (stress cloud diagram) of wall-mounted sliding block (existing technology) and horizontally arranged (this application) structures when subjected to loads in the Y-axis direction. Figure 13 This is a comparison of the overall rigidity analysis (stress cloud diagram) of wall-mounted sliding block type (existing technology) and horizontally arranged type (this application) structures when subjected to loads in the Z-axis direction. Figure 14 This is a schematic diagram showing the variation trend of the slide block of the present invention under different h / l and m / k when subjected to force in the X direction. The blue fluctuation curve in the figure is the measured experimental data, and the red dotted line is the fitted trend curve. Figure 15 This is a schematic diagram showing the variation trend of the slide block of the present invention under different h / l and m / k when subjected to force in the Y direction. The blue fluctuation curve in the figure is the measured experimental data, and the red dotted line is the fitted trend curve. Figure 16 This is a schematic diagram showing the variation trend of the slide block under different h / l and m / k when subjected to force in the Z direction. The blue fluctuation curve in the figure represents the measured experimental data, and the red dotted line represents the fitted trend curve.

[0024] The attached figures are labeled as follows: 1. Machine tool crossbeam; 11. First guide rail; 12. Second guide rail; 13. First reinforcing rib; 2. Slide; 21. First vertical plate; 22. Second vertical plate; 23. Third vertical plate; 24. First horizontal plate; 25. Second horizontal plate; 26. Third horizontal plate; 27. Fourth vertical plate; 28. Weight reduction hole; 3. Spindle assembly; 31. Spindle; 32. Spindle box; 321. Box reinforcing rib; 33. Spindle lifting drive component; 34. Lifting guide rail; 4. Bed; 41. Support column; 5. Column; 51. Second reinforcing rib; 61. Linear motor stator; 62. Linear motor mover; 7. Worktable; 71. Worktable longitudinal movement drive component; 72. Third guide rail. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0027] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0028] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0029] See also Figures 1 to 16 As shown, according to an embodiment of the present invention, a multi-channel machine tool is provided, specifically, for example, a multi-channel drilling and tapping vertical machining center, including a machine tool beam 1, at least two slides 2, and a spindle assembly 3 assembled on each slide 2. Figure 1 In one specific embodiment shown, three slides 2 are provided, and three corresponding spindle assemblies 3 are also provided. Thus, the multi-channel machine tool is specifically a three-channel machine tool. It can be understood that each spindle assembly 3 can perform machining independently. A first guide rail 11 is provided on the top surface of the machine tool beam 1. The first guide rail 11 extends along the length direction (i.e., the X-axis direction) of the machine tool beam 1. The bottom end of each slide 2 is slidably connected to the first guide rail 11 so that each slide 2 is slidably supported on the top surface of the machine tool beam 1. Each spindle assembly 3 can be vertically connected to the side surface of each slide 2 near the working area of ​​the multi-channel machine tool.

[0030] In this technical solution, on the one hand, each slide 2 of the multi-channel machine tool is mounted on the top surface of the machine tool beam 1 in a sliding support manner, that is, the bullhead mounting support structure is compared with the wall-mounted connection method in the prior art, which can significantly improve the overall rigidity of the machine tool, thereby improving the machine tool's resistance to deformation during use, improving the machining accuracy of the machine tool, and facilitating the adjustment of the verticality of the machine tool in the YZ direction during assembly; on the other hand, each slide 2 shares the same first guide rail 11, which can effectively utilize the top movement space of the machine tool beam 1, shorten the beam width, achieve a compact layout while ensuring multi-station machining functions.

[0031] In some embodiments, the top surface of the machine tool beam 1 is also provided with a second guide rail 12 that is parallel and spaced apart from the first guide rail 11, and the bottom end of each slide 2 is slidably connected to the second guide rail 12.

[0032] In this technical solution, a second guide rail 12 is further provided on the top surface of the machine tool beam 1, which is parallel and spaced apart from the first guide rail 11. The bottom end of each slide 2 is simultaneously slidably connected to the first guide rail 11 and the second guide rail 12, which can further improve the positional stability of each slide 2 and the smoothness and reliability of X-axis sliding.

[0033] In some embodiments, the top surface of the machine tool beam 1 has a first platform (not labeled in the figure) and a second platform (not labeled in the figure), wherein the second platform is located on the side of the first platform away from the working area, which is the area on the side where the worktable 7 is set, and the height of the second platform is greater than the height of the first platform. The first guide rail 11 is connected to the first platform, and the second guide rail 12 is connected to the second platform. Correspondingly, the bottom end face of the slide 2 forms an upwardly extending notch (not labeled in the figure) with the area corresponding to the second platform, so as to compensate for the height difference between the two guide rails and ensure horizontal support for the bottom end face of the slide 2.

[0034] In this technical solution, a first plane and a second plane of different heights are set on the top surface of the machine tool crossbeam 1, and the height of the first plane near the working area is lower than that of the second plane. The first guide rail 11 and the second guide rail 12 are respectively set on the two planes. This realizes the sliding setting of the high and low rails of the slide 2. This allows the weight of the moving part, i.e., the slide 2, to be transferred to the bearing part, i.e., the machine tool crossbeam 1. At the same time, due to the notch setting of the slide 2, its mass is lighter and its inertia is smaller. It can more easily obtain high speed, high acceleration and higher response speed, so that a lower specification servo transmission mechanism can be selected, thereby reducing the product manufacturing cost.

[0035] In some embodiments, the height difference between the second guide rail 12 and the first guide rail 11 is h, and the center distance (i.e., span) between the second guide rail 12 and the first guide rail 11 is l, where 0.15 ≤ h / l ≤ 0.8. See details... Figures 14 to 16 As shown, it has been verified that when the ratio of the height difference h of the guide rails to the span l of the two guide rails is greater than 0.15, the ratio of the structure's mass m to its stiffness k begins to decrease sharply and gradually tends to stabilize. Therefore, it can be considered that the ratio of the height difference of the guide rails to the span of the guide rails can be taken within the range of 0.15 to 0.8, depending on the actual design conditions, in order to maximize the balance between the structure's mass and stiffness. Specifically, from Figures 14 to 16 As shown in the figure, the sharp drop in the curve, that is, the sharp decrease in m / k, indicates that the ratio of the guide rail height difference h to the guide rail span l is not the preferred range for obtaining a lightweight and high-rigidity structure in the range of 0 to 0.15. After 0.15, the change is gradual, and small structural changes will not cause a large change in specific stiffness. Since this curve is a theoretical calculation value, assembly, processing, and overall dimensions need to be considered during the design. Therefore, an optimal range of 0.15 to 0.8 is selected to facilitate structural design.

[0036] In some embodiments, a linear motor stator 61 is provided on the top surface of the machine tool beam 1, and a linear motor mover 62 is connected to the bottom end face of each slide 2. The linear motor stator 61 is located between the first guide rail 11 and the second guide rail 12. In a preferred embodiment, the aforementioned linear motor stator 61 is a plurality of magnetic plates (permanent magnets) spaced apart along the length direction of the machine tool beam 1, while the linear motor mover 62 is an energized coil and an iron core for winding the coil. In this way, the lateral displacement of each slide 2 can be independently controlled by controlling the energization of each corresponding coil.

[0037] In this technical solution, the existing structure of multiple ball screws driving the lateral movement of each slide is no longer used. Instead, a linear drive motor is used to drive and adjust the lateral displacement of each slide 2 and the spindle assembly 3 assembled on it. Multiple linear motor movers 62 share the same linear motor stator 61. The lateral movement control of each slide 2 is achieved by controlling the on and off of the coils in each linear motor mover 62. This can further shorten the length of the machine tool beam 1, reduce the overall size of the machine, and thus reduce the floor space occupied by the equipment.

[0038] In some embodiments, the multi-channel machine tool further includes a bed 4, with each end of the machine tool crossbeam 1 supported on the bed 4 via a column 5. The machine tool crossbeam 1 and the column 5 are integrally cast. Integrating the machine tool crossbeam 1 and the column 5 into one piece can effectively reduce the connection surfaces of components, improve connection reliability, and further enhance structural rigidity.

[0039] In some embodiments, multiple support columns 41 are spaced apart on the top surface of the bed 4 and the bottom end surface of the machine tool beam 1, with each support column 41 spaced between two columns 5. It is understood that each support column 41 is supported between the machine tool beam 1 and the bed 4.

[0040] In this technical solution, by further setting support columns 41 on the bottom end face of the machine tool beam 1 to form a multi-point support system design for the machine tool beam 1, the structural stability of the machine tool beam 1 can be further improved.

[0041] In the illustrated embodiment, there are two support columns 41, which are spaced apart along the length of the machine tool beam 1. This divides the space between the two columns 5 into three tool magazine openings (not indicated in the figure), enabling the beam structure of the present invention to meet the working requirements of a three-spindle machine tool.

[0042] In some embodiments, the bed 4 is made of marble, the machine tool beam 1 and the column 5 are made of cast iron, and in some embodiments, the spindle box 31 and the slide 2 are made of cast iron and are integrally cast during manufacturing.

[0043] In this technical solution, the machine tool's supporting components, namely the bed 4, are made of marble with high vibration resistance and low thermal expansion coefficient. After being connected with the machine tool crossbeam 1 and column 5 which are integrally formed by casting, a composite foundation structure is formed. This fully combines the good vibration resistance of marble with the high strength and impact resistance of casting, which can improve the structural strength and impact resistance of moving parts (i.e., slide 2, etc.) and improve the dynamic stability of the whole machine.

[0044] The machine tool crossbeam 1 has a first reinforcing rib 13, and the column 5 has a second reinforcing rib 51. The shape of the first reinforcing rib 13 is different from that of the second reinforcing rib 51. The torsional and shear resistance of the first reinforcing rib 13 is higher than that of the second reinforcing rib 51, and the bending and compressive resistance of the second reinforcing rib 51 is higher than that of the first reinforcing rib 13.

[0045] In this technical solution, a first reinforcing rib 13 and a second reinforcing rib 51 of different shapes are respectively provided in the machine tool crossbeam 1 and the column 5. The torsional and shear resistance of the first reinforcing rib 13 is higher than that of the second reinforcing rib 51, and the bending and compressive resistance of the second reinforcing rib 51 is higher than that of the first reinforcing rib 13. This makes the machine tool crossbeam 1 have higher torsional and shear resistance and the column 5 have higher bending and compressive resistance. This makes the mechanical properties of the machine tool crossbeam 1 and the column 5 match their respective load-bearing conditions, thereby effectively improving the overall rigidity of the machine tool crossbeam structure of the present invention. This effectively avoids the problem of large elastic deformation of the crossbeam structure under heavy load or high-speed cutting conditions, which would cause the tool trajectory to deviate from the theoretical path and reduce the machining accuracy and surface quality.

[0046] In some embodiments, the first reinforcing rib 13 is triangular in shape; specifically, the first reinforcing rib 13 is an equilateral triangle, and the second reinforcing rib 51 is rectangular in shape.

[0047] In this technical solution, the first reinforcing rib 13 is designed in the shape of a triangle. The triangular reinforcing rib has high torsional and shear resistance and is geometrically stable, which can significantly suppress the local deformation of the machine tool beam 1 under local loads (such as the spindle box of the moving part). The second reinforcing rib 51 is designed in the shape of a rectangle, which is a closed structure. The rectangular reinforcing rib has high bending and compressive resistance, and is especially suitable for the overall load-bearing conditions of the beam structure. In this technical solution, the triangular first reinforcing rib 13 and the rectangular second reinforcing rib 51 can work together to improve the overall stiffness of the beam structure, and at the same time improve the dynamic performance of the beam structure.

[0048] In some implementation methods, see details. Figure 10 As shown, the machine tool crossbeam 1 has multiple first cavities (not labeled in the figure), each first cavity dividing the solid structure within the machine tool crossbeam 1 into multiple first reinforcing ribs 13; the column 5 has multiple second cavities (not labeled in the figure), each second cavity dividing the solid structure within the column 5 into multiple second reinforcing ribs 51. Projected onto a vertical plane parallel to the length of the machine tool crossbeam 1, the first cavities are triangular, and the second cavities are rectangular. In some embodiments, a plane perpendicular to the length of the machine tool crossbeam 1 and passing through the midpoint of the length of the machine tool crossbeam 1 is a first plane (not labeled in the figure). Each first cavity is symmetrical about the first plane, that is, along the length of the machine tool crossbeam 1, each first cavity formed therein and the first reinforcing ribs 13 formed by the intervals between the first cavities are both symmetrical about the first plane.

[0049] In some embodiments, the side wall of the slide 2 away from the working area is an inclined surface, and the inclined surface slopes from bottom to top towards the working area, which can further reduce the mass of the slide 2.

[0050] In some implementation methods, see details. Figure 5 As shown, the slide block 2 includes a first vertical plate 21, a second vertical plate 22, and a third vertical plate 23 arranged in parallel and spaced along the width direction of the first guide rail 11; a plurality of fourth vertical plates 27 arranged in parallel and spaced along the length direction of the first guide rail 11; and a first horizontal plate 24, a second horizontal plate 25, and a third horizontal plate 26 arranged in parallel and spaced along the height direction of the first guide rail 11. The first vertical plate 21, the second vertical plate 22, the third vertical plate 23, the fourth vertical plate 27, the first horizontal plate 24, the second horizontal plate 25, and the third horizontal plate 26 are vertically and crosswise connected to form a truss structure. The main shaft assembly 3 is assembled on the side surface of the first vertical plate 21.

[0051] In this technical solution, the vertical and horizontal plates with parallel intervals form a three-dimensional vertically intersecting structure in three-dimensional space, forming a slide 2 structure with multiple partitioned cavities inside. This structure can reduce the overall mass of the slide 2 while maintaining sufficient structural rigidity.

[0052] In some embodiments, each of the first vertical plate 21, the second vertical plate 22, the third vertical plate 23, the fourth vertical plate 27, the first horizontal plate 24, the second horizontal plate 25, and the third horizontal plate 26 is provided with a weight-reducing hole 28 that passes through the respective opposite side surfaces of the plate. The aforementioned weight-reducing hole 28 can be designed into shapes such as circles, rectangles, ellipses, and triangles according to actual needs. By providing weight-reducing holes 28 on each plate, the overall mass of the slide block 2 can be further reduced.

[0053] In some embodiments, the widths of the first horizontal plate 24, the second horizontal plate 25, and the third horizontal plate 26 in the width direction of the first guide rail 11 decrease from bottom to top, and the heights of the first vertical plate 21, the second vertical plate 22, and the third vertical plate 23 in the direction away from the working area decrease. This allows the center of mass (center of gravity) of the slide block 2 to be close to one side of the first guide rail 11, thereby making the driving force of the drive system as close as possible to the center of gravity of the structure. For example, when the X-axis is driven by a lead screw, the multiple sets of lead screw transmission systems on the crossbeam need to be staggered and arranged in parallel along the length direction of the crossbeam, and cannot be placed in the middle of the guide rail span, resulting in an offset. In order to make the driving force as close as possible to the center of gravity of the structure, the aforementioned high and low guide rail structure of this application is adopted.

[0054] The outer vertical surface of the first vertical plate 21 is slidably connected to the spindle box 32 through the lifting guide rail 34. The top of the outer vertical surface of the first vertical plate 21 is also provided with a fixing seat (not marked in the figure) for fixing the spindle lifting drive component 33 (e.g., a lead screw motor). The spindle lifting drive component 33 is used to drive the spindle box 32 to move up and down along the guiding direction of the lifting guide rail 34, that is, in the Z direction.

[0055] In some embodiments, the spindle assembly 3 includes a spindle 31 and a spindle housing 32 fitted radially outward therefrom. The spindle assembly 3 is slidably connected to the slide block 2 via the spindle housing 32. The width of the cross-section of the spindle housing 32 increases in the direction away from the working area; that is, the cross-section of the spindle housing 32 is approximately A-shaped. Commonly used spindle housings have an overall "U"-shaped cross-section. When increasing the guide rail span of the spindle housing, its external dimensions increase simultaneously, resulting in unnecessary weight gain. In this application, using an "A"-shaped cross-section allows for a smaller increase in the size of the area on the spindle housing where the spindle is mounted when designing the guide rail span, while increasing the guide rail span to improve structural rigidity and support stability.

[0056] In some embodiments, the outer wall surface of the spindle box 32 is provided with multiple box-body reinforcing ribs 321, and each of the box-body reinforcing ribs 321 is arranged at intervals along the height of the spindle box 32, which can significantly improve the bending and torsional strength of the spindle box 32.

[0057] See also Figures 11 to 13 As shown, the overall rigidity of the machine tool in this application is significantly improved by employing a machine tool crossbeam 1 and column 5 made of cast iron through integrated injection molding, a bed 4 made of marble material, and a slide 2 supported by high and low rails. See details... Figures 11 to 13 As shown, Figure 11 The diagram shows the deformation of the spindle end under the same X-direction load (data labels in the figure) in the prior art solution (left side) and the solution of the present invention (right side). The deformation of the spindle end in the left solution is greater than that in the right solution, indicating that the solution of the present invention (right side) is more rigid. Figure 12 The diagram shows the deformation of the spindle end when subjected to the same Y-direction load (data labels in the figure) in the prior art solution (left side) and the solution of the present invention (right side). The deformation of the spindle end in the left solution is greater than that in the right solution, indicating that the solution of the present invention (right side) is more rigid. Figure 13 The diagram shows the deformation of the spindle end under the same Z-axis load (data labels in the figure) in the prior art solution (left side) and the solution of the present invention (right side). The deformation of the spindle end in the left solution is greater than that in the right solution, indicating that the solution of the present invention (right side) is more rigid.

[0058] The working area of ​​the aforementioned bed 4 is provided with multiple worktables 7 on the top surface. The number of worktables 7 is equal to the number of spindle assemblies 3 and they are arranged in a one-to-one correspondence. A third guide rail 72 is provided between the bottom surface of each worktable 7 and the top surface of the bed 4, and a worktable longitudinal movement drive component 71 is provided. Each worktable longitudinal movement drive component 71 can be a ball screw module, etc., to drive each worktable 7 to slide back and forth along the longitudinal direction, that is, the Y direction.

[0059] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A multi-channel machine tool, characterized in that, The machine tool includes a crossbeam (1), at least two slides (2), and a spindle assembly (3) assembled on each slide (2). A first guide rail (11) is provided on the top surface of the crossbeam (1). The first guide rail (11) extends along the length of the crossbeam (1). The bottom end of each slide (2) is slidably connected to the first guide rail (11) so that each slide (2) is slidably supported on the top surface of the crossbeam (1). Each spindle assembly (3) is vertically connected to the side surface of each slide (2) near the working area of ​​the multi-channel machine tool.

2. The multi-channel machine tool according to claim 1, characterized in that, The top surface of the machine tool beam (1) is also provided with a second guide rail (12) that is parallel and spaced apart from the first guide rail (11), and the bottom end of each slide (2) is also slidably connected to the second guide rail (12).

3. The multi-channel machine tool according to claim 2, characterized in that, The top surface of the machine tool beam (1) has a first platform and a second platform, wherein the second platform is located on the side of the first platform away from the working area, and the height of the second platform is greater than the height of the first platform. The first guide rail (11) is connected to the first platform, and the second guide rail (12) is connected to the second platform.

4. The multi-channel machine tool according to claim 3, characterized in that, The height difference between the second guide rail (12) and the first guide rail (11) is h, the center distance between the second guide rail (12) and the first guide rail (11) is l, 0.15≤h / l≤0.8; and / or, the bottom end face of the slide (2) forms an upwardly extending notch in the area corresponding to the second platform.

5. The multi-channel machine tool according to claim 2, characterized in that, The top surface of the machine tool beam (1) is also provided with a linear motor stator (61), and the bottom end face of each slide (2) is connected with a linear motor mover (62). The linear motor stator (61) is located between the first guide rail (11) and the second guide rail (12).

6. The multi-channel machine tool according to any one of claims 1 to 5, characterized in that, It also includes a bed (4), with each end of the machine tool beam (1) supported on the bed (4) via a column (5), and the machine tool beam (1) and the column (5) are cast integrally.

7. The multi-channel machine tool according to claim 6, characterized in that, Multiple support columns (41) are spaced apart on the top surface of the bed (4) and the bottom end face of the machine tool beam (1), with each support column (41) spaced between two columns (5).

8. The multi-channel machine tool according to claim 6, characterized in that, The bed (4) is made of marble, and the machine tool crossbeam (1) and the column (5) are made of cast iron; and / or, the machine tool crossbeam (1) has a first reinforcing rib (13), and the column (5) has a second reinforcing rib (51). The shape of the first reinforcing rib (13) is different from that of the second reinforcing rib (51), and the torsional and shear resistance of the first reinforcing rib (13) is higher than that of the second reinforcing rib (51). The bending and compressive resistance of the second reinforcing rib (51) is higher than that of the first reinforcing rib (13).

9. The multi-channel machine tool according to claim 3, characterized in that, The side wall of the slide (2) away from the work area is an inclined surface, and the inclined surface is inclined from bottom to top towards the side of the work area.

10. The multi-channel machine tool according to claim 9, characterized in that, The slide (2) includes a first vertical plate (21), a second vertical plate (22) and a third vertical plate (23) arranged in parallel along the width direction of the first guide rail (11), a plurality of fourth vertical plates (27) arranged in parallel along the length direction of the first guide rail (11), and a first horizontal plate (24), a second horizontal plate (25) and a third horizontal plate (26) arranged in parallel along the height direction of the first guide rail (11). The first vertical plate (21), the second vertical plate (22), the third vertical plate (23), the fourth vertical plate (27), the first horizontal plate (24), the second horizontal plate (25) and the third horizontal plate (26) are vertically and cross-connected to form a truss structure. The main shaft assembly (3) is assembled on the side surface of the first vertical plate (21).

11. The multi-channel machine tool according to claim 10, characterized in that, Each of the first vertical plate (21), the second vertical plate (22), the third vertical plate (23), the fourth vertical plate (27), the first horizontal plate (24), the second horizontal plate (25), and the third horizontal plate (26) is provided with a weight-reducing hole (28) that passes through the opposite side surfaces of each plate.

12. The multi-channel machine tool according to claim 10, characterized in that, The widths of the first horizontal plate (24), the second horizontal plate (25), and the third horizontal plate (26) in the width direction of the first guide rail (11) decrease from bottom to top, and the heights of the first vertical plate (21), the second vertical plate (22), and the third vertical plate (23) in the direction away from the work area decrease.

13. The multi-channel machine tool according to claim 1, characterized in that, The spindle assembly (3) includes a spindle (31) and a spindle housing (32) fitted on its radially outer side. The spindle assembly (3) is slidably connected to the slide (2) via the spindle housing (32). The width of the cross-section of the spindle housing (32) increases in the direction away from the working area.

14. The multi-channel machine tool according to claim 13, characterized in that, The outer wall of the spindle box (32) is provided with multiple box body reinforcing ribs (321), and each of the box body reinforcing ribs (321) is arranged at intervals along the height of the spindle box (32).

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