Drilling machine

Abstract

The utility model provides drilling machine. Drilling machine includes frame, workstation, driving part, cascade mechanism, heat exchange subassembly and driving part. The workstation is along first direction and is slidably arranged on the frame; A plurality of main shaft subassembly is along second direction and is slidably and interval arranged on the frame, and second direction is perpendicular to first direction; Cascade mechanism includes the cascade strip of extending along second direction, and cascade strip is fixedly connected with every main shaft subassembly; Driving part is located between frame and cascade mechanism and is fixedly connected with cascade mechanism, and driving part is used for driving cascade mechanism and every main shaft subassembly relatively frame and is slid along second direction, to make the drilling main shaft of main shaft subassembly be located above the position of corresponding workpiece to be processed; Heat exchange subassembly includes the first heat exchange mechanism of being located in cascade strip and the second heat exchange mechanism of being located in workstation, and first heat exchange mechanism is used for heat exchange to cascade strip, and second heat exchange mechanism is used for heat exchange to workstation.

Description

Technical Field

[0001] This utility model relates to the field of mechanical drilling technology, and in particular to a drilling machine. Background Technology

[0002] In the field of PCB (Printed Circuit Board) drilling, high-speed spindles are required to rapidly move up and down the PCB board to achieve drilling. Currently, the most in-demand PCB drilling machine is the six-axis mechanical PCB drilling machine. This machine uses two cascaded bars to connect six spindle assemblies evenly distributed on both sides of the motor to form a whole. The motor synchronously drives the six spindle assemblies to translate on the machine frame, which, in conjunction with the back-and-forth movement of the worktable, allows drilling to be performed on corresponding positions on the PCB board. However, in existing six-axis mechanical PCB drilling machines, the worktable and cascaded bars are susceptible to deformation due to ambient temperature (thermal expansion or contraction). This causes changes in the angle and position of the spindle drilling heads connected to the cascaded bars relative to the machine frame, resulting in decreased drilling accuracy. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a drilling machine equipped with a heat exchange component. This heat exchange component can exchange heat between the cascade bars and the worktable, thereby maintaining a stable temperature for both the cascade bars and the worktable. This reduces or even eliminates deformation caused by ambient temperature, thus improving the machining accuracy of the drilling machine.

[0004] To achieve the above objectives, this utility model provides a drilling machine, comprising: frame; A worktable is slidably mounted on the frame along a first direction, and the worktable is used to support at least one workpiece; Multiple spindle assemblies are slidably spaced on the frame along a second direction, each spindle assembly including a drilling spindle, the second direction being perpendicular to the first direction; A cascade mechanism, including cascade bars extending along the second direction, wherein the cascade bars are fixedly connected to each of the spindle assemblies; A driving component is disposed between the frame and the cascade mechanism and fixedly connected to the cascade mechanism. The driving component is used to drive the cascade mechanism and each of the spindle assemblies connected to the cascade bar to slide relative to the frame in the second direction, so that the drilling spindle of the spindle assembly is located above the corresponding workpiece to be processed position. The heat exchange assembly includes a first heat exchange mechanism disposed on the cascade bar and a second heat exchange mechanism disposed on the worktable. The first heat exchange mechanism is used to exchange heat on the cascade bar, and the second heat exchange mechanism is used to exchange heat on the worktable.

[0005] In one embodiment, the first heat exchange mechanism is a first heat exchange tube disposed on the outer peripheral wall of the cascade bar, and the first heat exchange tube is used to introduce a first heat exchange fluid. And / or, the second heat exchange mechanism is a second heat exchange tube disposed on the side wall of the worktable and / or on the outer wall of the side facing away from the spindle assembly, the second heat exchange tube being used to introduce a second heat exchange fluid.

[0006] In one embodiment, the first heat exchange mechanism is the first heat exchange tube, the second heat exchange mechanism is the second heat exchange tube, and the first heat exchange tube is connected to the second heat exchange tube.

[0007] In one embodiment, the first heat exchange tube extends along the second direction and is arranged on the outer peripheral wall of the cascade strip, and the second heat exchange tube extends at least in a tortuous manner on the outer wall of the worktable on the side opposite to the spindle assembly.

[0008] In one embodiment, the first heat exchange mechanism is a semiconductor cooling chip disposed on the outer peripheral wall of the cascade bar, and / or the second heat exchange mechanism is a semiconductor cooling chip disposed on the side wall of the worktable and / or on the outer wall of the side facing away from the spindle assembly.

[0009] In one embodiment, the drilling machine further includes a grating ruler disposed on the frame, the grating ruler being used to detect the movement distance of the plurality of spindle assemblies relative to the frame along the second direction; the drilling machine includes at least two spindle modules, each spindle module including at least two spindle assemblies; The number of the worktable, the cascade mechanism, the drive unit, and the grating ruler is the same as the number of the spindle module, and the worktable, the cascade mechanism, the drive unit, the grating ruler, and the spindle module are arranged in a one-to-one correspondence.

[0010] In one embodiment, at least two spindle modules are spaced apart on the frame along the second direction, and any two spindle modules contain the same number of spindle assemblies, with all spindle assemblies in each spindle module being evenly spaced along the second direction.

[0011] In one embodiment, the drilling machine includes two worktables, two cascaded mechanisms, two drive units, two grating rulers, and two spindle modules, each spindle module including three spindle assemblies.

[0012] In one embodiment, the two drive members are configured to be connected to the same control system, which synchronously controls the two drive members so that the two drive members drive all the spindle assemblies to slide synchronously in the second direction through the two cascaded mechanisms.

[0013] In one embodiment, the frame includes a machine platform, a crossbeam, and three feet. The three feet are disposed on the machine platform and spaced apart along the second direction. The crossbeam is disposed on the three feet, wherein the crossbeam and the three feet form a double gantry structure.

[0014] In one embodiment, the drilling machine includes at least two cascade mechanisms, each cascade mechanism including two cascade bars spaced apart along a third direction, and each cascade mechanism also including a plurality of second mounting plates spaced apart along the second direction, and each second mounting plate is fixedly connected to two cascade bars at opposite ends in the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; Each of the spindle assemblies is mounted on a second mounting plate, thereby fixing each spindle assembly to the cascading strip.

[0015] In one embodiment, the drilling machine further includes a second guide rail fixedly mounted on the frame and extending along the second direction, a second mounting plate slidably mounted on the second guide rail, and each spindle assembly slidably mounted on the second guide rail via the second mounting plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: In the drilling machine provided by this utility model, by setting a heat exchange assembly composed of the first heat exchange mechanism and the second heat exchange mechanism, heat exchange can be performed on the cascade bar and the worktable, so that the temperature of the cascade bar and the worktable can be kept stable, which can reduce or even avoid the deformation caused by the influence of ambient temperature, thereby improving the processing accuracy of the drilling machine.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a drilling machine provided in one embodiment of this utility model.

[0020] Figure 2 yes Figure 1 An enlarged schematic diagram of part A shown.

[0021] Figure 3 yes Figure 1 The diagram shows the cascaded bars and the first heat exchange mechanism.

[0022] Figure 4 yes Figure 1 The diagram shows the worktable and the second heat exchange mechanism.

[0023] Figure 5 This is a schematic diagram of the cascaded bars and worktable of an existing six-axis mechanical drilling machine for PCBs, showing thermal expansion.

[0024] Figure 6 yes Figure 1 The diagram shows the cascade bars of the drilling machine and the worktable under thermal expansion.

[0025] Explanation of key figure labels: 100-Drilling machine; 10-Frame; 11-Machine platform; 12-Crossbeam; 13-Foot; 20-Worktable; 21-Base unit; 30-Spindle assembly; 32-Drilling spindle; 40-Cascade mechanism; 41-First mounting plate; 42-Second mounting plate; 43-Cascade bar; 50-Drive component; 60-Heat exchange assembly; 61-First heat exchange mechanism; 62-Second heat exchange mechanism; 70-Slide table; 81-First guide rail; 82-Second guide rail; 83-Third guide rail. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] Please refer to the following: Figures 1 to 4 This utility model provides a drilling machine 100 for drilling workpieces, the workpieces being not limited to PCB boards or other similar materials. The drilling machine 100 includes a frame 10, a worktable 20, multiple spindle assemblies 30, a cascade mechanism 40, a drive unit 50, and a heat exchange assembly 60. In this utility model embodiment, "multiple" refers to two or more spindles.

[0028] Specifically, in the embodiments of this utility model, the worktable 20 is along the first direction ( Figure 1 The worktable 20 (shown in the Y direction / opposite direction of the Y direction) is slidably mounted on the frame 10, and is used to carry at least one of the workpieces; the plurality of spindle assemblies 30 are slidably mounted along the second direction (shown in the Y direction / opposite direction of the Y direction). Figure 1 The spindle assembly 30 (shown in the X direction / opposite direction of the X direction) is slidably spaced on the frame 10. Each spindle assembly 30 includes a drilling spindle 32, wherein the second direction is perpendicular to the first direction. The cascade mechanism 40 includes a first mounting plate 41 and a cascade bar 43 fixedly connected to the first mounting plate 41. The cascade bar 43 extends along the second direction and is fixedly connected to each spindle assembly 30. The drive member 50 is disposed between the frame 10 and the cascade mechanism 40 and is fixedly connected to the cascade mechanism 40, specifically disposed between the frame 10 and the first mounting plate 41 and fixedly connected. Connected to the first mounting plate 41, the driving member 50 is used to drive the cascade mechanism 40 and each of the spindle assemblies 30 connected to the cascade bar 43 to slide relative to the frame 10 in the second direction, so that the drilling spindle 32 of the spindle assembly 30 is located above the corresponding workpiece to be processed position; the heat exchange assembly 60 includes a first heat exchange mechanism 61 disposed on the cascade bar 43 and a second heat exchange mechanism 62 disposed on the worktable 20, the first heat exchange mechanism 61 is used to exchange heat on the cascade bar 43, and the second heat exchange mechanism 62 is used to exchange heat on the worktable 20.

[0029] It is easy to understand that in the drilling machine 100 provided in the embodiments of this utility model, by setting a heat exchange assembly 60 composed of the first heat exchange mechanism 61 and the second heat exchange mechanism 62, heat exchange can be performed on the cascade bar 43 and the worktable 20, so that the temperature of the cascade bar 43 and the worktable 20 can be kept stable. For example, the temperature of the cascade bar 43 and the worktable 20 can be kept stable within a temperature range that will not or will not easily undergo thermal expansion and contraction deformation. This can reduce or even avoid the deformation caused by the influence of ambient temperature, thereby ensuring that the angle and position of the drilling spindle 32 of the spindle assembly 30 connected to the cascade bar 43 relative to the frame 10 does not change or changes only slightly, which is beneficial to improving the processing accuracy of the drilling machine 100.

[0030] It should be noted that the drilling machine 100 provided in the embodiments of this utility model also includes other components, such as, but not limited to, a grating ruler (not shown in the figure) disposed on the frame 10. The grating ruler is used to detect the movement distance of the plurality of spindle assemblies 30 relative to the frame 10 along the second direction. The following will be combined with... Figure 1-4 The drilling machine 100 provided in the embodiments of this utility model will be described in further detail.

[0031] like Figure 1 As shown, in one embodiment of this utility model, the frame 10 includes a machine base 11, a crossbeam 12, and three feet 13. The three feet 13 are disposed on the machine base 11 and spaced apart along the second direction. The crossbeam 12 is disposed on the three feet 13. The crossbeam 12 and the three feet 13 form a double gantry structure, such that a through-passage is formed between each pair of adjacent feet 13, the crossbeam 12, and the machine base 11. The through-passage is used for the workbench 20 to pass through when sliding along the first direction.

[0032] Of course, in other embodiments of this utility model, the frame 10 can also be designed with other structures as needed. For example, but not limited to, the frame 10 may only include two legs 13, and the two legs 13 are connected to the opposite ends of the crossbeam 12, so that the crossbeam 12 and the two legs 13 form a single gantry structure. This is not limited.

[0033] The foot 13 can be fixedly mounted on the machine base 11 by means of threaded connection, welding, snap-fit ​​connection, etc., and the crossbeam 12 can also be fixedly mounted on the foot 13 by means of threaded connection, welding, snap-fit ​​connection, etc.

[0034] Furthermore, in Figure 1 In the example, the drilling machine 100 further includes a slide 70 and a first guide rail 81 extending along the first direction. The first guide rail 81 is not limited to being fixedly mounted on the machine base 11 by means of threaded connection, snap-fit ​​connection, etc. The slide 70 is slidably mounted on the machine base 11 via a pair of first guide rails 81. In this embodiment, the worktable 20 is mounted on the slide 70 by means of threaded connection, snap-fit ​​connection, etc., and can slide relative to the machine base 11 along the first direction. The slide 70 can utilize a slider to slide in cooperation with the first guide rail 81, which will not be elaborated further. It should be noted that the drilling machine 100 also includes a first drive mechanism (not shown in the figure) for driving the slide 70 and the worktable 20 to slide along the first direction. The first drive mechanism can be an existing linear drive motor, etc., which will also not be elaborated further.

[0035] Please combine Figure 1 and Figure 2In one embodiment of this utility model, the drilling machine 100 further includes a second guide rail 82 extending along the second direction. The second guide rail 82 is disposed on the side of the crossbeam body near the slide table 70 in the first direction. In this embodiment, each spindle assembly 30 is slidably disposed on the crossbeam 12 of the frame 10 via a pair of second guide rails 82. Specifically, the pair of second guide rails 82 extend along a third direction (…). Figure 1 The spindle assembly 30 is slidably connected to a second guide rail 82 at its opposite ends in the third direction (as shown in the Z direction / opposite direction of the Z direction). The first direction, the second direction, and the third direction are perpendicular to each other. Each spindle assembly 30 can be slidably connected to the second guide rail 82 via a second mounting plate 42 (described later). The second mounting plate 42 can slide with the second guide rail 82 using a slider; details will not be elaborated further. It should be noted that the spindle assembly 30 includes a third guide rail 83 extending along the third direction. The drilling spindle 32 can slide relative to the frame 10 along the third direction via a pair of third guide rails 83 spaced apart along the second direction, thereby adjusting the height of the drilling spindle 32 relative to the workpiece. In the embodiments of this utility model, the spindle assembly 30 includes not only the drilling spindle 32, but also a mounting bracket for mounting the drilling spindle 32 and a drive device for driving the drilling spindle 32 to rotate. The structure of the spindle assembly 30 is basically the same as that of the spindle assembly 30 of the existing drilling machine, and will not be described in detail.

[0036] exist Figure 1 and Figure 2In the example, the cascade mechanism 40 specifically includes two cascade bars 43 spaced apart along the third direction. The cascade mechanism 40 also includes multiple second mounting plates 42 spaced apart along the second direction. Each second mounting plate 42 is fixedly connected to two cascade bars 43 at opposite ends along the third direction. The aforementioned first mounting plate 41 is connected between two adjacent second mounting plates 42. Each spindle assembly 30 is correspondingly mounted on one of the second mounting plates 42, thereby fixing each spindle assembly 30 to the cascade bars 43. In this embodiment, by setting a pair of cascade bars 43 spaced apart along the third direction and fixing each spindle assembly 30 to the cascade bars 43 via the second mounting plates 42, the connection reliability between the spindle assembly 30 and the cascade mechanism 40 is improved. It is easy to understand that when the aforementioned driving member 50 drives the cascade mechanism 40 to slide along the second direction, the spindle assembly 30 can slide synchronously along the second direction following the cascade mechanism 40. In an embodiment of this utility model, the worktable 20 can drive the carried workpiece to move along the first direction, while the drilling spindle 32 can move along the second direction and the third direction. The first direction, the second direction, and the third direction are perpendicular to each other. Therefore, the drilling spindle 32 can be adjusted relative to the workpiece to any position requiring processing, thereby realizing the processing of the workpiece. It can be understood that, similar to existing cascade frames, the cascade mechanism 40 may also include other components or other structures, such as, but not limited to, a mounting structure for connecting the drive component 50 on the first mounting plate 41. The drive component 50 may be an existing linear motor and installed between the crossbeam 12 and the first mounting plate 41 using an existing structure, which will not be elaborated further.

[0037] As mentioned above, in the embodiments of this utility model, by setting the heat exchange assembly 60 composed of the first heat exchange mechanism 61 and the second heat exchange mechanism 62, heat exchange is performed on the cascade bar 43 and the worktable 20, thereby improving the processing accuracy of the drilling machine 100.

[0038] For specific details, please refer to... Figures 1 to 4In one embodiment of this utility model, the first heat exchange mechanism 61 is a first heat exchange tube disposed on the outer peripheral wall of the cascade bar 43, and the first heat exchange tube is used to introduce a first heat exchange fluid; the second heat exchange mechanism 62 is a second heat exchange tube disposed on the side wall of the worktable 20 and / or on the outer wall of the side facing away from the spindle assembly 30 (i.e., facing the bottom wall of the slide table 70), and the second heat exchange tube is used to introduce a second heat exchange fluid. In this embodiment, both the first heat exchange mechanism 61 and the second heat exchange mechanism 62 are selected as heat exchange tubes, which have a simple overall structure, are easy to install, and have low cost. Only a heat exchange fluid (such as cooling water or hot water) needs to be introduced to dissipate heat or heat the cascade bar 43 and the worktable 20, so that the cascade bar 43 and the worktable 20 maintain a stable temperature, so that they will not deform due to temperature changes or will not deform significantly due to small temperature changes, so that the angle and position of the drilling spindle 32 relative to the frame 10 are stable, thereby improving the accuracy of drilling. Preferably, in Figures 1 to 4 In the example, the first heat exchange tube is not limited to being connected to the second heat exchange tube via a flexible hose. In this way, the two heat exchange mechanisms of the heat exchange assembly 60 are interconnected heat exchange tubes that can be circulated with the same heat exchange fluid. This not only further simplifies the structure of the heat exchange mechanism, but also helps to ensure that the cascade bar 43 and the worktable 20 are kept at the same or similar temperature under the action of the same heat exchange fluid. This makes the difference in deformation even if the two deform due to the influence of temperature very small, thereby helping to further improve the processing accuracy of the drilling machine 100.

[0039] Alternatively, in Figures 2 to 4 In this example, the first heat exchange tube extends along the second direction and is arranged on the outer peripheral wall of the cascade bar 43, while the second heat exchange tube extends at least in a tortuous manner on the outer wall of the worktable 20 on the side opposite to the spindle assembly 30. It can be understood that since the cascade bar 43 is a slender rod shape, and the worktable 20 is a large-area plate-shaped surface, the first and second heat exchange tubes adopt different tube designs, which not only ensures sufficient heat exchange effect but also facilitates the installation of the heat exchange tubes. Preferably, in this embodiment, the second heat exchange tube is also arranged on the outer peripheral side wall of the worktable 20 to increase the contact area between the second heat exchange tube and the worktable 20, thereby improving the heat exchange efficiency of the worktable 20. By combining the structures of the cascade bar 43 and the worktable 20, different tube designs are made for the first heat exchange tube and the second heat exchange tube, so that the cascade bar 43 and the worktable 20 have relatively good heat exchange efficiency. It also helps to ensure that the cascade bar 43 and the worktable 20 are kept at the same or similar temperature, so that even if they deform due to the influence of temperature, the difference in deformation is very small, which helps to improve the processing accuracy of the drilling machine 100.

[0040] It is understood that in other embodiments of this utility model, the first heat exchange mechanism 61 and / or the second heat exchange mechanism 62 may not use heat exchange tubes, but other heat exchange mechanisms. For example, in another embodiment of this utility model, the first heat exchange mechanism 61 is a semiconductor cooling chip disposed on the outer peripheral wall of the cascade bar 43, and / or the second heat exchange mechanism 62 is a semiconductor cooling chip disposed on the side wall of the worktable 20 and / or on the outer wall of the side facing away from the spindle assembly 30. By connecting the semiconductor cooling chip to a DC power supply with adjustable output current direction, the semiconductor cooling chip can be controlled to perform cooling or heating, thus achieving the same heat exchange effect on the cascade bar 43 and the worktable 20. Preferably, when the first heat exchange mechanism 61 and the second heat exchange mechanism 62 are both semiconductor cooling chips and are connected to the same DC power supply, it is only necessary to control the current direction of one DC power supply to control the first heat exchange mechanism 61 and the second heat exchange mechanism 62 to be at the same cooling or heating temperature, ensuring that the temperature of the cascade bar 43 and the worktable 20 is the same or close, and also ensuring that the difference in deformation is small even if the two are deformed due to the influence of temperature, further improving the processing accuracy of the drilling machine 100.

[0041] Please refer to it again. Figure 1In one embodiment of this utility model, the plurality of spindle assemblies 30 are divided into at least two spindle modules, that is, the drilling machine 100 includes at least two spindle modules, and each spindle module includes at least two spindle assemblies 30; the number of the worktable 20, the cascade mechanism 40, the drive unit 50 and the grating ruler is the same as the number of the spindle modules, that is, the number of the worktable 20, the cascade mechanism 40, the drive unit 50 and the grating ruler is at least two, and the worktable 20, the cascade mechanism 40, the drive unit 50, the grating ruler and the spindle module are arranged in a one-to-one correspondence. In this embodiment, the drilling machine 100 includes a plurality of spindle assemblies 30 divided into multiple spindle modules. Each spindle module is driven by a separate drive unit 50 through a corresponding cascade mechanism 40, so that at least two spindle assemblies 30 included in the spindle module slide along the second direction. At the same time, the drilling spindle 32 moves along the third direction, and a corresponding worktable 20 drives the workpiece to move along the first direction, thereby realizing the processing of the workpiece on the worktable 20. It is understood that, while keeping the total number of spindle assemblies 30 in the drilling machine 100 unchanged, dividing the multiple spindle assemblies 30 into multiple spindle modules reduces the number of spindle assemblies 30 in each spindle module. This reduces the length of the cascading bars 43 connecting each spindle module, thereby reducing the impact of thermal expansion and contraction on the cascading bars 43 caused by temperature changes. This effectively weakens the relative changes in the angle and position of the drilling spindle 32 connected to the cascading bars 43 relative to the frame 10, thereby improving the machining accuracy of the workpiece. Furthermore, it can be understood that, compared to the multiple spindle modules sharing a single grating ruler to detect the movement distance of each spindle assembly 30 along the second direction, each spindle module is provided with a corresponding grating ruler, which can reduce the length of a single grating ruler. This can also reduce the impact of thermal expansion and contraction on the grating ruler caused by temperature changes, which helps to improve the detection accuracy of the grating ruler. This allows the spindle assembly 30 to move accurately to the processing position, which is beneficial to improving the accuracy of drilling.

[0042] Preferably, in Figure 1In the example, at least two spindle modules are spaced apart on the frame 10 along the second direction, and any two spindle modules contain the same number of spindle assemblies 30. All spindle assemblies 30 in each spindle module are evenly spaced along the second direction. By evenly distributing all spindle assemblies 30 in the drilling machine 100 into multiple spindle modules, and ensuring that all spindle assemblies 30 in each spindle module are evenly spaced, it can be ensured that the thermal expansion and contraction caused by temperature changes on the cascade strips 43 connected to each spindle module are the same. This ensures that the relative changes in the angle and position of the drilling spindle 32 of each spindle assembly 30 relative to the frame 10 are the same or approximately the same, which is beneficial for further improving the processing accuracy of the workpiece.

[0043] For example, such as Figure 1 As shown, in one embodiment of the present invention, the drilling machine 100 includes two worktables 20, two cascade mechanisms 40, two drive units 50, two grating rulers, and two spindle modules, each spindle module including three spindle assemblies 30. That is, similar to existing six-axis mechanical drilling machines, another embodiment of the present invention provides a drilling machine 100 including six spindle assemblies 30, and each of the six spindle assemblies 30 is divided into two spindle modules. The two spindle modules are spaced apart on the frame 10 along the second direction. Each spindle module includes three evenly spaced spindle assemblies 30, and each spindle module is driven by a corresponding drive unit 50 through a corresponding cascade mechanism 40 to slide relative to the frame 10 along the second direction, thereby... The workpiece on one of the corresponding worktables 20 is processed, wherein the movement distance of each spindle module along the second direction is detected by a corresponding grating ruler, and the two drive units 50 are configured to be connected to the same control system. The control system is used to synchronously control the two drive units 50 so that the two drive units 50 drive all the spindle assemblies 30 to slide synchronously along the second direction through the two cascade mechanisms 40, so that the spindle assemblies 30 included in the two spindle modules synchronously process the workpieces on the two worktables respectively. The two drive units 50 are controlled by the same control system, which not only simplifies the structure of the drilling machine 100, but also reduces control costs. Of course, in other embodiments of this utility model, the two drive units 50 may also be controlled by two independent control systems, which is not limited thereto.

[0044] It is understandable that, such as Figure 5As shown, in an existing PCB six-axis mechanical drilling machine, when the ambient temperature rises, the worktable 20 expands to both sides with its center M as the origin, and the cascade bar 43, which connects six spindle assemblies 30, expands to both sides with its center N as the origin due to heat. Because the distance between the center M of the worktable 20 and the center N of the cascade bar 43 along the second direction (i.e., the left-right direction shown in the figure) is relatively large, the difference in deformation caused by thermal expansion between the worktable 20 and the cascade bar 43 will be relatively large, which will lead to a decrease in the processing accuracy of the spindle assembly 30 set on the cascade bar 43. Similarly, when the ambient temperature decreases, the difference in deformation caused by contraction due to cooling between the worktable 20 and the cascade bar 43 will also lead to a decrease in the processing accuracy of the spindle assembly 30.

[0045] Unlike existing PCB six-axis mechanical drilling machines, such as Figure 6 As shown, in one embodiment of the drilling machine 100 provided by this utility model, because multiple spindle assemblies 30 are evenly divided into two spindle modules, each spindle module contains three spindle assemblies 30 connected by a set of cascade bars 43. When the ambient temperature rises, the worktable 20 expands to both sides with the center m as the origin, and the cascade bars 43 connecting the three spindle assemblies 30 expand to both sides with the center n as the origin due to heat. Compared to... Figure 5 The distance along the second direction between the center M of the worktable 20 and the center N of the cascade bar 43 in the existing PCB six-axis mechanical drilling machine is shown in one embodiment of the present invention. This distance along the second direction between the center m of the worktable 20 and the center n of the corresponding cascade bar 43 is reduced, thus helping to reduce or even avoid the deformation difference between the worktable 20 and the cascade bar 43 caused by thermal expansion, thereby improving the machining accuracy of the spindle assembly 30. Similarly, when the ambient temperature decreases, the deformation difference between the worktable 20 and the cascade bar 43 caused by cold contraction is reduced, which also helps to improve the machining accuracy of the spindle assembly 30.

[0046] Alternatively, such as Figure 1 and Figure 4 As shown, in one embodiment of this utility model, the worktable 20 is assembled from at least two base units 21. By dividing the worktable 20 into at least two base units 21, the length of each base unit 21 is correspondingly reduced, thereby reducing the swaying of the base unit 21 relative to the first guide rail 81 and the resulting positional shift of the workpiece on the worktable 20 relative to the drilling spindle 32. Furthermore, the splicing gap between two adjacent base units 21 can absorb the deformation caused by thermal expansion and contraction, thereby improving the machining accuracy of the workpiece by the drilling spindle 32.

[0047] In the drilling machine 100 provided in the above-described embodiments of the present invention, by providing a heat exchange assembly 60 composed of the first heat exchange mechanism 61 and the second heat exchange mechanism 62, heat exchange can be performed on the cascade bar 43 and the worktable 20, so that the temperatures of the cascade bar 43 and the worktable 20 remain stable. For example, the temperatures of the cascade bar 43 and the worktable 20 are stabilized within a temperature range that will not or are not prone to thermal expansion and contraction deformation. This can reduce or even avoid deformation caused by the influence of ambient temperature, thereby ensuring that the angle and position of the drilling spindle 32 of the spindle assembly 30 connected to the cascade bar 43 relative to the frame 10 do not change or change only slightly, which is beneficial to improving the machining accuracy of the drilling machine 100. Furthermore, by dividing all the spindle assemblies 30 included in the drilling machine 100 into multiple spindle modules and / or dividing the worktable into multiple base units 21, the machining accuracy of the drilling spindle 32 on the workpiece can be further improved.

[0048] In the description of this utility model, the terms "embodiment," "specific embodiment," "example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A drilling machine, characterized in that, include: frame; A worktable is slidably mounted on the frame along a first direction, and the worktable is used to support at least one workpiece; Multiple spindle assemblies are slidably spaced on the frame along a second direction, each spindle assembly including a drilling spindle, the second direction being perpendicular to the first direction; A cascade mechanism, including cascade bars extending along the second direction, wherein the cascade bars are fixedly connected to each of the spindle assemblies; A driving component is disposed between the frame and the cascade mechanism and fixedly connected to the cascade mechanism. The driving component is used to drive the cascade mechanism and each spindle assembly connected to the cascade bar to slide relative to the frame in the second direction, so that the drilling spindle of the spindle assembly is located above the corresponding workpiece to be processed position. The heat exchange assembly includes a first heat exchange mechanism disposed on the cascade bar and a second heat exchange mechanism disposed on the worktable. The first heat exchange mechanism is used to exchange heat on the cascade bar, and the second heat exchange mechanism is used to exchange heat on the worktable.

2. The drilling machine as described in claim 1, characterized in that, The first heat exchange mechanism is a first heat exchange tube disposed on the outer peripheral wall of the cascade bar, and the first heat exchange tube is used to introduce the first heat exchange fluid; And / or, the second heat exchange mechanism is a second heat exchange tube disposed on the side wall of the worktable and / or on the outer wall of the side facing away from the spindle assembly, the second heat exchange tube being used to introduce a second heat exchange fluid.

3. The drilling machine as described in claim 2, characterized in that, The first heat exchange mechanism is the first heat exchange tube, the second heat exchange mechanism is the second heat exchange tube, and the first heat exchange tube is connected to the second heat exchange tube.

4. The drilling machine as described in claim 2, characterized in that, The first heat exchange tube extends along the second direction and is arranged on the outer peripheral wall of the cascade strip, and the second heat exchange tube extends at least in a tortuous manner on the outer wall of the worktable on the side opposite to the spindle assembly.

5. The drilling machine as described in claim 1, characterized in that, The first heat exchange mechanism is a semiconductor cooling plate disposed on the outer peripheral wall of the cascade bar, and / or the second heat exchange mechanism is a semiconductor cooling plate disposed on the side wall of the worktable and / or on the outer wall of the side facing away from the spindle assembly.

6. The drilling machine according to any one of claims 1-5, characterized in that, The drilling machine also includes a grating ruler disposed on the frame, the grating ruler being used to detect the movement distance of the plurality of spindle assemblies relative to the frame along the second direction; the drilling machine includes at least two spindle modules, each spindle module including at least two spindle assemblies; The number of the worktable, the cascade mechanism, the drive unit, and the grating ruler is the same as the number of the spindle module, and the worktable, the cascade mechanism, the drive unit, the grating ruler, and the spindle module are arranged in a one-to-one correspondence.

7. The drilling machine as described in claim 6, characterized in that, The at least two spindle modules are spaced apart on the frame along the second direction, and any two spindle modules contain the same number of spindle components. All the spindle components in each spindle module are evenly spaced along the second direction.

8. The drilling machine as described in claim 7, characterized in that, The drilling machine includes two worktables, two cascaded mechanisms, two drive components, two grating rulers, and two spindle modules, each spindle module including three spindle assemblies.

9. The drilling machine as described in claim 8, characterized in that, The two drive units are configured to be connected to the same control system, which is used to synchronously control the two drive units so that the two drive units drive all the spindle assemblies to slide synchronously in the second direction through the two cascaded mechanisms.

10. The drilling machine as described in claim 8, characterized in that, The frame includes a machine platform, a crossbeam, and three feet. The three feet are disposed on the machine platform and spaced apart along the second direction. The crossbeam is disposed on the three feet, wherein the crossbeam and the three feet form a double gantry structure.

11. The drilling machine as described in claim 6, characterized in that, The drilling machine includes at least two cascade mechanisms, each cascade mechanism includes two cascade bars spaced apart along a third direction, and each cascade mechanism also includes a plurality of second mounting plates spaced apart along the second direction, and each second mounting plate is fixedly connected to two cascade bars at opposite ends in the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; Each of the spindle assemblies is mounted on a second mounting plate, thereby fixing each spindle assembly to the cascading strip.

12. The drilling machine as described in claim 11, characterized in that, The drilling machine further includes a second guide rail fixedly mounted on the frame and extending along the second direction, a second mounting plate slidably mounted on the second guide rail, and each spindle assembly slidably mounted on the second guide rail via the second mounting plate.

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