High-rigidity numerical control forming milling machine and installation method

Abstract

The application relates to a high-rigidity numerical control forming milling machine and a mounting method, and relates to the technical field of numerical control milling machines.The numerical control forming milling machine comprises a workbench, a numerical control system, a main shaft machining module, a clamping system and a Z-axis moving module.The Z-axis moving module comprises two groups of stands, a wire rail and a sliding block.The two groups of stands are arranged on the workbench in a spaced mode.The main shaft machining module is connected with the stands through the wire rail and the sliding block in a matched mode, so that the main shaft machining module can slide in the Z direction.The two groups of stands are connected through a pre-tightening assembly.The pre-tightening assembly can adjust the distance between the two stands, so that the ball on the sliding block can be matched with the track surface on the wire rail.The main shaft machining module is connected with the stands through a fixing assembly.The fixing assembly can fix the main shaft machining module, so that the main shaft machining module is located at a machining height.The application has the advantages of improving the ability of the equipment to resist deformation in the vertical direction and enhancing the rigidity of the whole milling machine.

Description

Technical Field

[0001] This application relates to the field of CNC milling machine technology, and in particular to a high-rigidity CNC forming milling machine and its installation method. Background Technology

[0002] A CNC milling machine is a high-precision automated machining equipment controlled by a computer program, widely used in various fields of manufacturing. Its core advantage lies in its ability to efficiently and accurately complete the cutting and machining of complex parts, making it particularly suitable for the production of multi-variety, small-batch, or high-precision products.

[0003] A milling machine has a machining module that is mounted on a column by side mounting. The machining module and the column are guided and slid by a linear guide and a slider. The machining module is driven by a lead screw. Because the weight of the machining module cannot directly press the slider and the linear guide to fit together, the gap between the slider and the linear guide increases, resulting in a decrease in the rigidity of the milling machine. Summary of the Invention

[0004] To address the issue that the gravity of the machining module cannot directly press the slider against the linear guide, resulting in increased gap between the slider and the linear guide and reduced rigidity of the milling machine, this application provides a high-rigidity CNC forming milling machine and its installation method.

[0005] On the one hand, the high-rigidity CNC forming milling machine provided in this application adopts the following technical solution:

[0006] A high-rigidity CNC milling machine includes a worktable, a CNC system, a spindle machining module, a clamping system, and a Z-axis moving module. The workpiece is mounted on the clamping system, which can move the workpiece along the X and Y axes. The Z-axis moving module includes two sets of columns, linear guides, and a slider. The two sets of columns are spaced apart on the worktable, forming a space between them for the spindle machining module to slide. The spindle machining module is connected to the columns via two sets of cooperating linear guides and the slider, enabling Z-axis sliding. The two sets of columns are connected by a pre-tensioning assembly, which adjusts the distance between the two columns to ensure that the balls on the slider fit against the track surface of the linear guide. The spindle machining module is connected to the columns by a fixing assembly, which secures the spindle machining module at the machining height.

[0007] By adopting the above technical solution, the spindle machining module can achieve stable Z-axis sliding between the two sets of columns. Simultaneously, the pre-tensioning assembly, through adjustment of the distance between the two columns, ensures that the balls on the slider are tightly fitted against the linear guide surface, thereby significantly reducing the gap between them. This design enhances the overall rigidity of the machine tool, reduces vibration transmission caused by external impacts or cutting forces, and improves the stability of the machining process and the quality of the machined surface. Furthermore, the fixing assembly ensures the stability of the spindle machining module after reaching the specified machining height, further improving the rigidity, machining accuracy, and reliability of the milling machine.

[0008] Preferably, the pre-tightening assembly includes a crossbeam and an adjusting bolt. The crossbeam is fixedly connected to one set of the columns and connected to another set of the columns via the adjusting bolt. The adjusting bolt is rotatably connected to the column and inserted into a threaded hole on the column, so that the distance between the two sets of columns can be adjusted by rotating the adjusting bolt.

[0009] By adopting the above technical solution, the crossbeam is fixedly connected to one set of columns, while the other set of columns is connected via adjusting bolts. These adjusting bolts are rotatably connected to the columns and their spacing is adjusted by inserting them into threaded holes. This design allows for precise adjustment of the distance between the two sets of columns, ensuring a tight fit between the slider and the linear guide, reducing the gap between them. Ultimately, this enhances the rigidity of the milling machine, reduces vibration transmission, and improves the quality and stability of the machined surface.

[0010] Preferably, the pre-tightening assembly further includes a pre-tightening tie rod, which passes through the two sets of columns and is threadedly connected to the two sets of columns, so that the distance between the two sets of columns can be adjusted by rotating the tie rod.

[0011] By adopting the above technical solution, the pre-tensioning tie rod is threaded through and connected to the two sets of columns, effectively adjusting the distance between them. This design, in conjunction with the crossbeam and adjusting bolts, further enhances the precise control over the relative position between the columns. The bidirectional force application characteristic of the tie rod ensures that the columns on both sides are evenly stressed and move inwards, thereby ensuring a tighter fit between the slider and the linear guide, significantly reducing the gap between them. This improvement not only increases the effective contact area of ​​the balls between the slider and the linear guide but also significantly enhances the load deformation resistance of the entire system, ultimately resulting in a significant improvement in the overall rigidity of the milling machine, reducing vibration transmission caused by external impacts or cutting forces, and greatly improving the quality of the machined surface.

[0012] Preferably, the spindle machining module is disposed between the crossbeam and the tie rod.

[0013] By adopting the above technical solution, the spindle machining module is positioned between the crossbeam and the tie rod, which fully utilizes the structural space and ensures the stability of the spindle machining module during Z-axis sliding. This positioning design results in a more uniform distribution of preload, effectively reducing the gap between the linear guide and the slider, and improving the reliability of the sliding guide.

[0014] Preferably, the fixing component includes a fixing part, a connecting part, and a fixing bolt. The fixing part is fixedly disposed on the column, the connecting part is fixedly disposed on the spindle machining module, and the fixing bolt can pass through the fixing part and the connecting part to fix the spindle machining module.

[0015] By adopting the above technical solution, the fixing part and the connecting part are respectively fixed to the column and the spindle machining module, and the two are connected by fixing bolts, thereby achieving the height positioning and fixation of the spindle machining module. This design ensures the stability and reliability of the spindle machining module during the machining process, avoids positional displacement caused by vibration or other external factors, and improves machining accuracy and efficiency.

[0016] Preferably, the fixing part has a strip-shaped hole arranged along the Z direction, the fixing bolt passes through the strip-shaped hole and is inserted into the threaded hole on the connecting part, the spindle machining module can drive the fixing bolt to slide along the strip-shaped hole, and the fixing bolt can abut against the fixing part to fix the spindle machining module.

[0017] By adopting the above technical solution, the slotted hole design allows the fixing bolt a certain range of motion in the Z-axis, thus facilitating the adjustment of the spindle machining module's position. Once the spindle machining module reaches the designated height, the fixing bolt can be precisely locked by abutting against the fixing part, ensuring the spindle machining module is stably fixed at the required machining height and improving rigidity and positioning accuracy during the machining process.

[0018] Preferably, the connecting part is provided with a proximity switch, and the sensing head of the proximity switch faces the end of the fixing bolt.

[0019] By adopting the above technical solution, when the spindle machining module reaches the specified height, the proximity switch can detect the position of the fixing bolt, ensuring that the fixing bolt is accurately tightened in the predetermined position, thereby improving the accuracy and reliability of the spindle machining module fixing.

[0020] Preferably, each slider has a lubrication cavity at both ends, and each lubrication cavity contains a lubricating sponge that fits against the linear guide. The lubricating sponge is filled with lubricating oil. The linear guide has a rack arranged along the Z-direction, and a gear that meshes with the rack is rotatably connected to the slider. Each lubrication cavity of the slider has a pressure block, and the gear is connected to two pressure blocks through a transmission component. The gear can drive the pressure block located at the front end of the slider to squeeze the lubricating sponge through the transmission component, so as to squeeze the lubricating oil to be coated on the track surface of the linear guide.

[0021] By adopting the above technical solution, lubricating sponges are placed in the lubrication cavities at both ends of the slider and filled with lubricating oil. The transmission is achieved through the meshing of a rack on the linear guide and a gear on the slider, combined with the linkage between the gear and the pressure block. As the slider moves along the Z-axis, the gear rotates and, through the transmission, drives the front pressure block to periodically squeeze the lubricating sponge, thereby uniformly coating the linear guide surface with lubricating oil. This design, on the one hand, allows the lubricating sponge to uniformly absorb lubricating oil through capillary action, with controllable release during squeezing, avoiding localized over- or under-application caused by direct application. On the other hand, the pressure plate exerts pressure on the lubricating oil when squeezing the lubricating sponge, forcing the lubricating oil into the gap between the slider and the linear guide, facilitating lubrication between the two surfaces.

[0022] Preferably, the transmission component includes two connecting rods, a base plate, and a push plate. The connecting rods correspond one-to-one with the pressure blocks and are fixedly connected. The connecting rods are slidably disposed on the slider. Each connecting rod is provided with a stop block. Each connecting rod is connected to the slider through a return spring, which can push the pressure block to reset. The two base plates are fixedly disposed on the two end faces of the gear. The push plate corresponds one-to-one with the base plate and is rotatably connected through a rotating shaft. The push plates on the two base plates face opposite directions. The base plate is provided with a support surface, which can restrict the rotation of the push plate so that the push plate can push the stop block to slide. The rotating shaft is connected to the base plate through a return torsion spring, which can drive the push plate to fit against the support surface.

[0023] By adopting the above technical solution, when the spindle machining module slides along the Z-axis, the rack drives the gear to rotate. At this time, the reset torsion spring drives the push plate to fit against the support surface on the base plate. The gear drives the push plates on both sides to rotate. One of the push plates pushes the stop block to slide. The stop block pulls the pressure block located at the front end of the slider to squeeze the lubricating sponge. The other stop block is blocked by another stop block and rotates around the rotation axis, so that the pressure block corresponding to the stop block remains stationary. This design ensures that no matter which direction the linear guide slides, the lubricating oil enters from the front end of the slider and lubricates between the slider and the linear guide, reducing the hydraulic oil dripping and wasting caused by the pressure block at the rear end of the slider squeezing the lubricating sponge, and improving the lubrication utilization rate of the lubricating oil.

[0024] On the other hand, the installation method of the high-rigidity CNC forming milling machine provided in this application adopts the following technical solution:

[0025] An installation method for a high-rigidity CNC milling machine includes the following steps: S1, assembling the spindle machining module and installing the clamping system on the worktable; S2, installing the spindle machining module onto two columns via a linear guide and slider structure, and then installing the pre-tightening assembly onto the two columns; S3, placing the two columns on the worktable, and then adjusting the distance between the two columns to the required distance using the pre-tightening assembly; S4, fixing the columns on the worktable; S5, adjusting the spindle machining module to the specified height, and then fixing the spindle machining module using the fixing assembly; S6, completing the installation and debugging of the CNC system.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The pre-tightening assembly adjusts the distance between the two columns to ensure a tight fit between the slider and the linear guide, significantly reducing the gap between them and increasing the effective contact area between the balls and the raceway, thereby greatly improving the equipment's ability to resist vertical load deformation.

[0028] 2. The fixing component can firmly fix the spindle machining module at a specific height, effectively preventing displacement caused by vibration or external force during machining, improving the stability of the machining module when milling the workpiece, and further enhancing the rigidity of the entire system;

[0029] 3. The gear drives the pressure block at the front end of the slider to squeeze the lubricating sponge, while the pressure block at the rear end of the slider remains stationary. This ensures that regardless of the direction the linear guide slides, lubricating oil enters from the front end of the slider and lubricates between the slider and the linear guide. This reduces the amount of hydraulic oil wasted due to the pressure block at the rear end of the slider squeezing the lubricating sponge, thus improving the lubrication utilization rate of the lubricating oil. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a high-rigidity CNC forming milling machine according to Embodiment 1 of this application.

[0031] Figure 2 This is a structural schematic diagram of the milling machine from another perspective of Embodiment 1 of this application.

[0032] Figure 3 yes Figure 2 Enlarged view of section A.

[0033] Figure 4 yes Figure 2 Enlarged view of section B in the middle.

[0034] Figure 5 This is a schematic diagram of the spindle machining module in Embodiment 2 of this application.

[0035] Figure 6 yes Figure 5 Enlarged view of section C.

[0036] Figure 7 This is a schematic diagram of the transmission component in Embodiment 2 of this application.

[0037] Figure 8 This is a top view of the slider in Embodiment 2 of this application.

[0038] Figure 9 It is along Figure 8 A sectional view of DD.

[0039] Figure 10 yes Figure 7 Enlarged view of part E in the image.

[0040] Explanation of reference numerals in the attached drawings: 1. Worktable; 2. Spindle machining module; 3. Clamping system; 4. Z-axis movement module; 41. Column; 42. Linear guide; 43. Slider; 5. Preload assembly; 51. Crossbeam; 52. Adjusting bolt; 53. Pull screw; 54. Support block; 6. Fixing assembly; 61. Fixing part; 62. Connecting part; 63. Fixing bolt; 64. Strip hole; 65. Friction pad; 66. Proximity switch; 71. Lubrication chamber; 72. Lubricating sponge; 73. Rack; 74. Gear; 75. Pressure block; 76. Transmission component; 761. Connecting rod; 762. Base plate; 763. Push plate; 764. Stop block; 765. Return spring; 766. Rotating shaft; 767. Support surface; 768. Return torsion spring; 77. Support slide. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0042] This application discloses a high-rigidity CNC forming milling machine.

[0043] Example 1

[0044] Reference Figure 1 A high-rigidity CNC milling machine includes a worktable 1, a CNC system, a spindle machining module 2, a clamping system 3, and a Z-axis moving module 4. The workpiece is mounted on the clamping system 3, which moves the workpiece along the X and Y axes via a motor-screw mechanism. The spindle machining module 2 includes a motor drive mechanism and a milling cutter. The motor drive mechanism drives the milling cutter to rotate, thereby milling the surface of the workpiece.

[0045] Reference Figure 2 , Figure 3The Z-axis moving module 4 includes two sets of columns 41, linear guides 42, and sliders 43. The two sets of columns 41 are spaced apart on the worktable 1, forming a space between the two sets of columns 41 for the spindle machining module 2 to slide. The spindle machining module 2 is connected to the columns 41 through two sets of cooperating linear guides 42 and sliders 43. In this embodiment, the sliders 43 are fixedly installed on the columns 41, and the linear guides 42 are fixedly installed on the spindle machining module 2 along the Z direction. One of the columns 41 is provided with a motor screw mechanism connected to the spindle machining module 2 so that the spindle machining module 2 can slide along the Z direction.

[0046] Reference Figure 2 The two sets of columns 41 are connected by a pre-tightening component 5. The distance between the two columns 41 is adjusted by the pre-tightening component 5 so that the balls on the slider 43 fit against the track surface on the linear guide 42. The spindle machining module 2 is connected to the columns 41 by a fixing component 6. The fixing component 6 can fix the spindle machining module 2 so that the spindle machining module 2 is located at the machining height. The spindle machining module 2 is fixed at the machining height, and the workpiece is driven to slide by the clamping system 3 to realize the milling of the workpiece surface.

[0047] When installing the milling machine, first assemble the spindle machining module 2 and install the clamping system 3 on the worktable 1. Then, install the spindle machining module 2 onto the two columns 41 via the linear guide 42 and slider 43 structure. Next, install the pre-tightening assembly 5 onto the two columns 41. Then, place the two columns 41 on the worktable 1. Then, adjust the distance between the two columns 41 to the required distance using the pre-tightening assembly 5. Then, fix the two columns 41 onto the worktable 1 with bolts. Next, adjust the spindle machining module 2 to the specified height. Then, fix the spindle machining module 2 with the fixing assembly 6. Finally, complete the installation and debugging of the CNC system.

[0048] The spindle machining module 2 can achieve stable Z-axis sliding between the two sets of columns 41. Simultaneously, the preload assembly 5 adjusts the distance between the two columns 41 to ensure close contact between the balls on the slider 43 and the track surface of the linear guide 42, significantly reducing the gap between them. This design enhances the overall rigidity of the machine tool, reduces vibration transmission caused by external impacts or cutting forces, and improves the stability of the machining process and the quality of the machined surface. Furthermore, the fixing assembly 6 ensures the stability of the spindle machining module 2 after reaching the specified machining height, further improving the rigidity, machining accuracy, and reliability of the milling machine.

[0049] Reference Figure 2In this embodiment, the preload assembly 5 includes a crossbeam 51, an adjusting bolt 52, and a tie rod 53. The crossbeam 51 is positioned on top of the column 41 and above the spindle machining module 2, while the tie rod 53 is positioned below the spindle machining module 2. Positioning the spindle machining module 2 between the crossbeam 51 and the tie rod 53 ensures stability during Z-axis sliding, resulting in a more uniform preload distribution. This effectively reduces the gap between the linear guide 42 and the slider 43, improving the reliability of the sliding guide.

[0050] Reference Figure 2 There are two crossbeams 51. One end of the crossbeam 51 is fixedly connected to one column 41 by bolts. The adjusting bolt 52 is set on the other column 41. The top of the column 41 is fixedly installed with a support block 54 opposite to the crossbeam 51. The adjusting bolt 52 is rotated through the support block 54, and the end of the adjusting bolt 52 is threaded into the threaded hole at the end of the crossbeam 51. The distance between the two sets of columns 41 is adjusted by rotating the adjusting bolt 52.

[0051] Reference Figure 2 The tie rod 53 is threaded through the two sets of columns 41 and connected to the two sets of columns 41 by thread. By rotating the tie rod 53, the distance between the two sets of columns 41 can be adjusted. Through the bidirectional force application characteristic of the tie rod 53, the columns 41 on both sides can be evenly stressed and move inward, thereby ensuring that the slider 43 and the linear guide 42 fit more closely and significantly reducing the gap between them.

[0052] When adjusting the distance between the two columns 41, tightening the adjusting bolt 52 and the pull screw 53 pulls one column 41 closer to the other, enhancing the synergistic effect of the crossbeam 51 and the adjusting bolt 52, and further improving the ability to precisely control the relative position between the columns 41. The synergistic effect of the adjusting bolt 52 and the pull screw 53 increases the effective contact area of ​​the balls between the slider 43 and the linear guide 42, and also significantly improves the load deformation resistance of the entire system. Ultimately, this results in a significant improvement in the overall rigidity of the milling machine, reduces vibration transmission problems caused by external impacts or cutting forces, and greatly improves the quality of the machined surface.

[0053] Reference Figure 2 , Figure 4In this embodiment, there are two sets of fixing components 6. The spindle machining module 2 is fixed to the column 41 by the two sets of fixing components 6. Each set of fixing components 6 includes a fixing part 61, a connecting part 62, and a fixing bolt 63. The fixing part 61 is fixedly disposed on the column 41, and the connecting part 62 is fixedly disposed on the spindle machining module 2. The fixing part 61 and the connecting part 62 are arranged opposite to each other. The fixing part 61 has a strip hole 64 on the side facing the connecting part 62. The strip hole 64 is arranged along the Z direction. The fixing bolt 63 passes through the strip hole 64. One end of the fixing bolt 63 passes through the threaded hole on the connecting part 62. A friction pad 65 is sleeved on the fixing bolt 63. The friction pad 65 is located between the screw head of the fixing bolt 63 and the fixing part 61. The screw head of the fixing bolt 63 presses the friction pad 65 onto the fixing part 61, increasing the friction between the fixing bolt 63 and the fixing part 61.

[0054] When the spindle machining module 2 slides along the Z-axis, the fixing bolt 63 is in a loose state and slides along the strip hole 64, facilitating the adjustment of the spindle machining module 2's position. When the spindle machining module 2 slides to the machining height, the fixing bolt 63 can be precisely locked by abutting against the fixing part 61, ensuring that the spindle machining module 2 is stably fixed at the required machining height. This ensures the stability and reliability of the spindle machining module 2 during the machining process, avoids positional displacement caused by vibration or other external factors, and improves machining accuracy and efficiency.

[0055] Reference Figure 2 , Figure 4 Each connecting part 62 is fixedly equipped with a proximity switch 66, with the sensing head of the proximity switch 66 facing the end of the fixing bolt 63. When the spindle machining module 2 reaches the specified height, the proximity switch 66 can detect the distance of the fixing bolt 63, ensuring that the preload of the fixing bolt 63 against the fixing part 61 meets the design requirements, thereby improving the accuracy and reliability of the fixing of the spindle machining module 2.

[0056] The implementation principle of Example 1 is as follows: The spindle machining module 2 can achieve stable Z-axis sliding between the two sets of columns 41. Simultaneously, by rotating the adjusting bolt 52 and the pull screw 53 to adjust the distance between the two columns 41, the balls on the slider 43 are tightly fitted against the track surface of the linear guide 42, thereby significantly reducing the gap between them. This design enhances the overall rigidity of the machine tool, reduces vibration transmission caused by external impacts or cutting forces, and improves the stability of the machining process and the quality of the machined surface. Furthermore, the tight friction fixation between the fixing bolt 63 and the fixing part 61 ensures the stability of the spindle machining module 2 after reaching the specified machining height, further improving the rigidity, machining accuracy, and reliability of the milling machine.

[0057] Example 2

[0058] Reference Figure 5, Figure 6 The difference between this embodiment and embodiment 1 is that a rack 73 is fixedly provided on the spindle machining module 2 along the Z direction, and a gear 74 is rotatably connected to one side of the slider 43 through a gear 74 shaft, and the gear 74 meshes with the rack 73.

[0059] Reference Figure 7 , Figure 8 and Figure 9 Each slider 43 has a lubrication cavity 71 at both ends. The cross-sectional shape of the lubrication cavity 71 is an enlargement of the cross-sectional shape of the linear guide 42. Each lubrication cavity 71 contains a lubricating sponge 72 that fits against the various track surfaces of the linear guide 42. The lubricating sponge 72 is connected to an external lubricating oil supply system, so that the lubricating sponge 72 is filled with lubricating oil. Each lubrication cavity 71 of the slider 43 has a pressure block 75. The pressure block 75 has the same shape as the lubricating sponge 72. A gear 74 is connected to the two pressure blocks 75 through a transmission component 76. The gear 74 drives the pressure block 75 located at the front end of the slider 43 to squeeze the lubricating sponge 72, squeezing the lubricating oil between the slider 43 and the linear guide 42 and coating the track surface of the linear guide 42. The lubrication cavities 71 at both ends of the slider 43 contain lubricating sponges 72 filled with lubricating oil. The lubricating sponges 72 uniformly absorb the lubricating oil through capillary action. The release amount during squeezing is controllable, avoiding local over- or under-application caused by direct application.

[0060] Reference Figure 7 , Figure 10 In this embodiment, the transmission component 76 includes two connecting rods 761, a base plate 762, and a push plate 763. Each connecting rod 761 corresponds to a pressure block 75. The connecting rod 761 has a three-section, mutually perpendicular structure. One end of each connecting rod 761 is inserted into the lubrication cavity 71 and fixedly connected to the pressure block 75, while the other end extends to the position corresponding to the gear 74. The free ends of the two connecting rods 761 are located on both sides of the gear 74. The slider 43 is laterally fixed with support slides 77 corresponding to each connecting rod 761. The connecting rods 761 slide along the support slides 77, allowing the support slides 77 to support the sliding of the connecting rods 761. Each connecting rod 761 has a stop 764 facing the gear 74 on its free end. Each connecting rod 761 is connected to the slider 43 via a return spring 765. The return spring 765 is sleeved on the connecting rod 761. One end of the return spring 765 is fixedly connected to the connecting rod 761, and the other end is fixedly connected to the connecting rod 761. The return spring 765 pushes the pressure block 75 to reset, so that the pressure block 75 releases the pressure on the lubricating sponge 72.

[0061] Reference Figure 7 , Figure 10Two base plates 762 are fixedly mounted on the two end faces of the gear 74. Push plates 763 correspond one-to-one with the base plates 762 and are rotatably connected by a rotating shaft 766. The axis of the rotating shaft 766 is parallel to the axis of the gear 74. The push plates 763 on the two base plates 762 face opposite directions. A support surface 767 is provided on the base plate 762. The support surface 767 is located outside the rotating shaft 766 and is in contact with the push plate 763, so that the push plate 763 can push the stop block 764 to slide. The rotating shaft 766 and the base plate 762 are connected by a reset torsion spring 768. One end of the reset torsion spring 768 is fixedly connected to the rotating shaft 766, and the other end is fixedly connected to the base plate 762, so that the reset torsion spring 768 drives the push plate 763 to be in contact with the support surface 767. When gear 74 drives push plate 763 to engage with stop block 764, push plate 763 located between baffle and base plate 762 pushes stop block 764 to slide. Push plate 763 located on the same side of baffle and base plate 762 rotates around rotation axis 766, so that stop block 764 remains stationary.

[0062] When the spindle machining module 2 slides along the Z direction, the rack 73 drives the gear 74 to rotate. At this time, the reset torsion spring 768 drives the push plate 763 to fit against the support surface 767 on the base plate 762. The gear 74 drives the push plates 763 on both sides to rotate. One of the push plates 763 pushes the stop block 764 to slide. The stop block 764 pulls the pressure block 75 located at the front end of the slider 43 to squeeze the lubricating sponge 72. When the pressure plate squeezes the lubricating sponge 72, it generates a squeezing force on the lubricating oil, which can squeeze the lubricating oil into the gap between the slider 43 and the linear guide 42, so as to facilitate the lubrication of the linear guide 42 and the slider 43.

[0063] Another push plate 763 is blocked by another stop 764 and rotates around the rotating shaft 766, so that the pressure block 75 corresponding to the stop 764 remains stationary. This ensures that no matter which direction the linear guide 42 slides, the lubricating oil enters from the front end of the slider 43 between the slider 43 and the linear guide 42 for lubrication, reducing the pressure block 75 at the rear end of the slider 43 from squeezing the lubricating sponge 72 and causing hydraulic oil to drip and be wasted, thus improving the lubrication utilization rate of the lubricating oil.

[0064] The implementation principle of Example 2 is as follows: the gear 74 drives the pressure block 75 at the front end of the slider 43 to squeeze the lubricating sponge 72, while the pressure block 75 at the rear end of the slider 43 remains stationary. This ensures that regardless of which direction the linear guide 42 slides, the lubricating oil enters from the front end of the slider 43 between the slider 43 and the linear guide 42 for lubrication. This reduces the hydraulic oil dripping and wasting caused by the pressure block 75 at the rear end of the slider 43 squeezing the lubricating sponge 72, thereby improving the lubrication utilization rate of the lubricating oil.

[0065] A method for installing a high-rigidity CNC milling machine includes the following steps:

[0066] S1. Assemble the spindle machining module 2 and install the clamping system 3 on the worktable 1.

[0067] S2. Install the spindle machining module 2 onto the two columns 41 via the linear guide 42 and slider 43. The linear guide 42 is fixedly installed on the spindle machining module 2, and the slider 43 is fixedly installed on the column 41. Then, pass the linear guide 42 through the slider 43. Next, fix the crossbeam 51 to one of the columns 41 with bolts. Rotate the adjusting bolt 52 into the threaded hole in the crossbeam 51. Pass the tie rod 53 through the two columns 41 to complete the initial assembly of the two columns 41.

[0068] S3. Place the two columns 41 on the workbench 1, then rotate the adjusting bolt 52 and the tie rod 53 to adjust the distance between the two columns 41 to the required distance, so that the preload between the slider 43 and the linear guide 42 meets the design requirements.

[0069] S4. Secure the two columns 41 to the workbench 1 using bolts.

[0070] S5. Adjust the spindle machining module 2 to the specified height through the motor screw mechanism, and then rotate the fixing bolt 63. The fixing bolt 63 presses the friction plate against the fixing part 61. Use the proximity switch 66 to determine whether the fixing bolt 63 is tightened in place, and complete the fixing of the spindle machining module 2.

[0071] S6. Complete the installation and debugging of the CNC system.

[0072] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-rigidity CNC forming milling machine, characterized in that: It includes a worktable (1), a CNC system, a spindle machining module (2), a clamping system (3) and a Z-axis moving module (4). The workpiece is mounted on the clamping system (3), which can drive the workpiece to move along the X and Y directions. The Z-axis moving module (4) includes two sets of columns (41), linear guides (42) and sliders (43). The two sets of columns (41) are spaced apart on the worktable (1), and a space is formed between the two sets of columns (41) for the spindle machining module (2) to slide. The spindle machining module (2) is connected to the columns (41) through two sets of linear guides (42) and the sliders (43) to enable the spindle machining module (2) to slide in the Z direction. The two sets of columns (41) are connected by a pre-tightening assembly (5). The pre-tightening assembly (5) can adjust the distance between the two columns (41) so that the ball on the slider (43) fits against the track surface on the linear guide (42). The spindle machining module (2) is connected to the columns (41) by a fixing assembly (6). The fixing assembly (6) can fix the spindle machining module (2) so that the spindle machining module (2) is located at the machining height.

2. The high-rigidity CNC forming milling machine according to claim 1, characterized in that: The pre-tightening assembly (5) includes a crossbeam (51) and an adjusting bolt (52). The crossbeam (51) is fixedly connected to one set of the columns (41) and connected to another set of the columns (41) by the adjusting bolt (52). The adjusting bolt (52) is rotatably connected to the column (41) and inserted into a threaded hole on the column (41) so that the distance between the two sets of columns (41) can be adjusted by rotating the adjusting bolt (52).

3. The high-rigidity CNC forming milling machine according to claim 2, characterized in that: The pre-tightening assembly (5) further includes a pre-tightening tie rod (53), which passes through the two sets of columns (41) and is threadedly connected to the two sets of columns (41) so that the distance between the two sets of columns (41) can be adjusted by rotating the tie rod (53).

4. The high-rigidity CNC forming milling machine according to claim 3, characterized in that: The spindle machining module (2) is located between the crossbeam (51) and the tie rod (53).

5. The high-rigidity CNC forming milling machine according to claim 1, characterized in that: The fixing component (6) includes a fixing part (61), a connecting part (62), and a fixing bolt (63). The fixing part (61) is fixedly disposed on the column (41), the connecting part (62) is fixedly disposed on the spindle machining module (2), and the fixing bolt (63) can pass through the fixing part (61) and the connecting part (62) to fix the spindle machining module (2).

6. The high-rigidity CNC forming milling machine according to claim 5, characterized in that: The fixing part (61) has a strip hole (64) arranged along the Z direction. The fixing bolt (63) passes through the strip hole (64) and is inserted into the threaded hole on the connecting part (62). The spindle machining module (2) can drive the fixing bolt (63) to slide along the strip hole (64). The fixing bolt (63) can abut against the fixing part (61) to fix the spindle machining module (2).

7. The high-rigidity CNC forming milling machine according to claim 6, characterized in that: The connection part (62) is provided with a proximity switch (66), and the sensing head of the proximity switch (66) faces the end of the fixing bolt (63).

8. The high-rigidity CNC forming milling machine according to claim 1, characterized in that: Each slider (43) has a lubrication cavity (71) at both ends, and each lubrication cavity (71) has a lubrication sponge (72) that fits against the linear guide (42), and the lubrication sponge (72) is filled with lubricating oil; The linear guide (42) is provided with a rack (73) arranged along the Z direction. The slider (43) is rotatably connected with a gear (74) that meshes with the rack (73). The slider (43) is provided with a pressure block (75) in each of the lubrication chambers (71). The gear (74) and the two pressure blocks (75) are connected by a transmission member (76). The gear (74) can drive the pressure block (75) located at the front end of the slider (43) to squeeze the lubricating sponge (72) through the transmission member (76), so as to squeeze the lubricating oil to be coated on the track surface of the linear guide (42).

9. The high-rigidity CNC forming milling machine according to claim 8, characterized in that: The transmission component (76) includes two connecting rods (761), a base plate (762), and a push plate (763). The connecting rods (761) correspond one-to-one with the pressure blocks (75) and are fixedly connected. The connecting rods (761) are slidably disposed on the slider (43). Each connecting rod (761) is provided with a stop block (764). Each connecting rod (761) is connected to the slider (43) through a return spring (765). The return spring (765) can push the pressure block (75) to reset. Two substrates (762) are fixedly disposed on the two end faces of the gear (74). The push plate (763) corresponds to the substrate (762) and is rotatably connected by a rotating shaft (766). The push plates (763) on the two substrates (762) face opposite directions. The substrate (762) is provided with a support surface (767). The support surface (767) can restrict the rotation of the push plate (763) so that the push plate (763) can push the stop (764) to slide. The rotating shaft (766) is connected to the substrate (762) by a reset torsion spring (768). The reset torsion spring (768) can drive the push plate (763) to fit against the support surface (767).

10. A method for installing a high-rigidity CNC forming milling machine, characterized in that: Includes the following steps: S1. Assemble the spindle machining module (2) and install the clamping system (3) on the worktable (1); S2. Install the spindle machining module (2) onto the two columns (41) via the linear guide (42) and slider (43) structure, and then install the pre-tightening assembly (5) onto the two columns (41); S3. Place the two columns (41) on the workbench (1), and then adjust the distance between the two columns (41) to the required distance using the pre-tightening assembly (5); S4. Fix the column (41) on the workbench (1); S5. Adjust the spindle machining module (2) to the specified height, and then fix the spindle machining module (2) by fixing component (6); S6. Complete the installation and debugging of the CNC system.

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