A bridge-type gantry machining center

Abstract

The application discloses a bridge gantry machining center and belongs to the field of numerical control machining, which comprises a workbench, a machining table fixedly connected to the workbench, and a multi-axis displacement unit arranged on the workbench, wherein the outer surface of the machining table is fixedly connected with a collecting cover for collecting cooling liquid and chips, and the lower end of the machining table is fixedly connected with a chip removal unit connected with the collecting cover and used for multi-stage processing of the chips; the block-shaped, strip-shaped and roll-shaped chips falling from the collecting cover are crushed by a pair of crushing rollers driven by a motor two, and then the crushed chips are introduced into a shell; the rotating shaft and the spiral blade driven by the motor two are used for secondary cutting of the chips in the conveying process, and the sawtooth further cuts off the strip-shaped or roll-shaped chips which are not completely crushed, so that the conveying and crushing of various chips are realized, the volume of the chips is reduced, and the capacity of the material box is increased. The chips processed by the pre-crushing module can be directly subjected to briquetting treatment, so that a secondary processing procedure is saved and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of CNC machining, and more specifically, to a bridge-type gantry machining center. Background Technology

[0002] The bridge-type gantry machining center is a large CNC machine tool widely used in industries such as aerospace, automotive, and mold making.

[0003] The structure of a gantry machining center includes a worktable, a gantry, a slide, a CNC system, and a chip removal system. The chip removal system typically includes several types such as chain-type chip conveyors, scraper-type chip conveyors, and spiral chip conveyors. The chip removal system removes the chips generated during the machining process, ensuring the cleanliness and safety of the working area.

[0004] For example, the prior art (Chinese invention patent application with publication number CN113977297A) discloses a gantry machining center, which uses chip conveyor plates and chip conveyor grooves on the gantry bed to collect and discharge waste chips from the bed. However, since the size and shape of chips generated during the machining of different workpieces are different, chips may get stuck in the chip conveyor groove when being discharged. Currently, the commonly used chip conveyor in machining centers is the chain plate type, which uses the continuous movement of the chain to carry the chips on the metal plate and move them to the chip removal area before they fall directly into the hopper. Although this avoids the problem of chip jamming, it is only suitable for conveying block, strip, and coil chips. When conveying small particles of chips, leakage may occur. In addition, the chain plate type chip conveyor is relatively large and requires a certain amount of space. While the spiral type chip conveyor is smaller and suitable for conveying small particles of chips, it is prone to clogging when conveying block, strip, and coil chips. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide a bridge-type gantry machining center.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A bridge-type gantry machining center includes a worktable, a machining table fixed to the worktable, and a multi-axial displacement unit disposed on the worktable. A collection cover for collecting coolant and chips is fixed to the outer surface of the machining table, and a chip removal unit connected to the collection cover for multi-stage processing of chips is fixed to the lower end of the machining table.

[0008] The chip removal unit includes a housing fixed to the lower end of the processing table, a motor fixed to one side of the housing, a rotating shaft rotatably connected inside the housing, multiple spiral blades fixed to the outer surface of the rotating shaft, serrated grooves opened at the edges of the spiral blades, drainage holes and chip removal ports respectively opened on both sides of the lower end of the housing, a dropping hopper connecting the feeding end of the housing to the collection cover, and a pre-crushing module set inside the feeding end of the housing. The output shaft of the motor passes through the housing and is fixed to one end of the rotating shaft.

[0009] The pre-crushing module includes a motor II fixed to one side of the housing, two crushing rollers rotatably connected inside the feed end of the housing, and two meshing toothed discs rotatably connected to the outer surface of one side of the housing and respectively connected to the two crushing rollers. The output shaft of the motor II passes through the housing and is fixed to one side of one of the crushing rollers.

[0010] Furthermore, the rotating shaft includes a fixed frame fixed to the inner wall of the housing, a shaft body one with one end fixed to the output shaft of a motor, a shaft body two with both ends rotatably connected to the inner wall of the housing and one side of the fixed frame respectively, an internal gear ring fixed to one side of the shaft body two, a central gear rotatably connected to one side of the fixed frame, and multiple planetary gears. The central gear meshes with the multiple planetary gears, and the multiple planetary gears mesh with the internal gear ring. One end of the shaft body one passes through the fixed frame and is fixed to one side of the central gear.

[0011] Furthermore, the fixing frame also has a through groove for the passage of chips.

[0012] Furthermore, a tearing and shredding module is connected inside the housing, and the tearing and shredding module includes two inner sleeves located inside the housing and multiple shearing blades fixed to the inner walls of the two inner sleeves. The two inner sleeves are respectively fitted outside the shaft one and shaft two.

[0013] Furthermore, the tearing and shredding module also includes two extension ends symmetrically fixed to the outer surface of the housing, a motor three fixed to the outer surface of the housing, a rotating shaft rotatably connected between the two extension ends, two gear discs two fixed to the outer surface of the rotating shaft, gear keys fixed to the outer surfaces of the two inner sleeves, a movable groove one opened inside the housing to accommodate the gear keys, and a slot opened inside the housing and connected to the movable groove one for discharging the gear keys. The two gear discs two respectively mesh with the two gear keys, and the output shaft of the motor three passes through one of the extension ends and is fixed to one end of the rotating shaft.

[0014] Furthermore, multiple helical blades are fixed at intervals on the outer surfaces of shaft one and shaft two, and the circular array of shearing blades is fixed on the inner wall of the inner sleeve, with the shearing blades located in the interval area between two adjacent helical blades.

[0015] Furthermore, the housing is also provided with a shearing assist component, which includes a movable groove II formed on the inner wall of the housing, a guide post fixed to the inner wall of the movable groove II, a spring sleeved on the outside of the guide post, an annular flange fixed to the outer surface of the inner sleeve, a clearance groove formed on one side of the annular flange, and a circular flange integrally formed on the inner wall of the movable groove II. The other end of the guide post is movably inserted into the annular flange.

[0016] Furthermore, the housing has two movable grooves 3 inside to accommodate two inner sleeves, and each of the inner walls of the two movable grooves 3 has a discharge slope on one side.

[0017] Furthermore, a enclosure for surrounding the processing table is fixedly connected to the upper end of the worktable. The multi-axial displacement unit includes an X-axis linear movement module disposed on the upper end of the worktable, a support frame fixed to the moving end of the X-axis linear movement module, a crossbeam fixed to the upper end of the support frame, a Y-axis linear movement module disposed inside the crossbeam, and a Z-axis linear movement module movably connected to one side of the crossbeam and connected to the moving end of the Y-axis linear movement module. The telescopic end of the Z-axis linear movement module is connected to a spindle box.

[0018] Furthermore, a liquid storage box and a material storage box are movably inserted inside the workbench, and the material storage box and the liquid storage box are located below the chip discharge port and the drain hole, respectively.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) This solution incorporates a pre-crushing module. Motor 2 drives the crushing rollers to crush blocky, strip-shaped, and rolled chips falling from the collection hood. These chips are then processed into smaller pieces and enter the housing. Motor 1 then drives the rotating shaft and spiral blades to rotate, performing secondary cutting during the conveying process. The saw teeth further cut any incompletely crushed strip-shaped or rolled chips. This process achieves both conveying and crushing of various types of chips, reducing chip volume and increasing the capacity of the hopper. The chips processed by the pre-crushing module can be directly briquetteed, eliminating the need for secondary processing and reducing costs. Furthermore, the equipment is small and compact, allowing it to be installed below the workbench without occupying extra space.

[0021] (2) This solution sets the rotating shaft as two shafts, which are connected by an internal gear ring, planetary gears and a central gear. When the motor drives the shaft to rotate, the shaft can drive the central gear and planetary gears to rotate, thereby driving the shaft to rotate. The rotation speed of the shaft is faster than that of the shaft. This allows the chip processing inside the housing to be divided into a slow processing zone and a fast processing zone. The rotation of the shaft conveys the chips and also produces a low shear and tearing effect on the chips. It performs preliminary crushing on strip or roll chips that are not completely crushed, reduces the wear on the spiral blades 28, prolongs the contact time, and makes the preliminary crushing and loosening more thorough. The rapid rotation of the shaft produces a high shear and tearing effect on the chips, performs more fine crushing on the chips, and more effectively processes harder and tougher chips. It ensures that all chips are completely crushed in a short time, reduces the residence time of chips on the shaft, and avoids the risk of chip entanglement and blockage. It can efficiently and reliably process block, strip and roll chips.

[0022] (3) This solution is equipped with a tearing and crushing module. When the rotating shaft is driven by motor one, motor three can also drive the inner sleeve to rotate in the opposite direction to the spiral blades inside the shell. The shearing blades on the inner wall of the inner sleeve rotate, so that the chips are initially sheared and crushed by the spiral blades and then come into contact with the shearing blades for further shearing and crushing. The reverse rotation of the shearing blades increases the relative speed between the chips and the blades, making the shearing force stronger, enhancing the crushing effect, and extending the service life of the equipment. The combination of the two achieves multiple shearing, which is particularly suitable for processing materials that are difficult to crush, making the chips more finely crushed, reducing the amount of insufficiently crushed strip and roll chips, and preventing them from getting tangled on the rotating shaft. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the chip removal unit structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the pre-crushing module structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the rotating shaft, helical blade, and serrated groove structure of the present invention.

[0027] Figure 5 This is a schematic diagram of the structure of the fixing frame, internal gear ring, planetary gears and central gear of the present invention;

[0028] Figure 6 This is a schematic diagram of the toothed key and inner sleeve structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the shearing blade structure of the present invention;

[0030] Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at point A in the middle;

[0031] Figure 9 This is a cross-sectional view of the housing and rotating shaft of the present invention;

[0032] Figure 10 For the present invention Figure 9 Enlarged schematic diagram of the structure at point B;

[0033] Figure 11 For the present invention Figure 9 Enlarged schematic diagram of the structure at point C.

[0034] Explanation of the labels in the diagram:

[0035] 1. Workbench; 11. Enclosure; 12. Machining Table; 13. Collection Cover; 14. X-axis Linear Movement Module; 15. Support Frame; 16. Crossbeam; 17. Z-axis Linear Movement Module; 18. Spindle Box; 2. Chip Removal Unit; 21. Housing; 22. Motor 1; 23. Drain Hole; 24. Chip Discharge Port; 25. Drop Hopper; 26. Pre-crushing Module; 261. Motor 2; 262. Crushing Roller; 263. Gear Disc 1; 27. Rotating Shaft; 271. Shaft 1; 272. Shaft 2; 273. Internal Gear Ring; 2 74. Planetary gear; 275. Central gear; 276. Fixing frame; 28. Spiral blade; 29. ​​Sawtooth groove; 3. Tear and shredder module; 31. Motor three; 32. Extension end; 33. Rotating shaft; 34. Gear disc two; 35. Inner sleeve; 36. Gear key; 37. Shearing blade; 38. Slotting; 4. Shearing assist component; 41. Annular flange; 42. Alternating groove; 43. Guide post; 44. Spring; 45. Movable groove one; 46. Movable groove two; 47. Circular flange; 48. Movable groove three; 49. Discharge slope. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1 to 11A bridge-type gantry machining center includes a worktable 1, a machining table 12 fixedly connected to the worktable 1, and a multi-axis displacement unit disposed on the worktable 1. The upper end of the worktable 1 is also fixedly connected to a barrier 11 for surrounding the machining table 12. The multi-axis displacement unit includes an X-axis linear movement module 14 disposed on the upper end of the worktable 1, a support frame 15 fixedly connected to the moving end of the X-axis linear movement module 14, a crossbeam 16 fixedly connected to the upper end of the support frame 15, a Y-axis linear movement module disposed inside the crossbeam 16, and a Z-axis linear movement module 17 movably connected to one side of the crossbeam 16 and connected to the moving end of the Y-axis linear movement module. The telescopic end of the Z-axis linear movement module 17 is connected to a spindle box 18.

[0038] The outer surface of the processing table 12 is fixedly connected to a collection cover 13 for collecting coolant and chips, and the lower end of the processing table 12 is fixedly connected to a chip removal unit 2 connected to the collection cover 13 for multi-stage processing of chips.

[0039] The chip removal unit 2 includes a housing 21 fixed to the lower end of the processing table 12, a motor 22 fixed to one side of the housing 21, a rotating shaft 27 rotatably connected inside the housing 21, multiple spiral blades 28 fixed to the outer surface of the rotating shaft 27, serrated grooves 29 opened at the edges of the spiral blades 28, drainage holes 23 and chip removal ports 24 respectively opened on both sides of the lower end of the housing 21, a dropping hopper 25 connecting the feeding end of the housing 21 to the collection cover 13, and a pre-crushing module 26 set inside the feeding end of the housing 21. The output shaft of the motor 22 passes through the housing 21 and is fixed to one end of the rotating shaft 27.

[0040] The pre-crushing module 26 includes a second motor 261 fixedly connected to one side of the housing 21, two crushing rollers 262 rotatably connected inside the feed end of the housing 21, and two meshing toothed discs 263 rotatably connected to the outer surface of one side of the housing 21 and respectively connected to the two crushing rollers 262. The output shaft of the second motor 261 passes through the housing 21 and is fixedly connected to one side of one crushing roller 262.

[0041] The workbench 1 is equipped with a liquid storage box and a material storage box, which are located below the chip discharge port 24 and the drain hole 23, respectively.

[0042] By adopting the above technical solution, the workpiece to be processed is placed on the processing table 12. The multi-axial displacement unit drives the spindle box 18 to move in three axes (XYZ) to adjust the position of the tool installed on the spindle box 18. The chips generated during processing will flow from the processing table 12 into the collection hood 13 along with the coolant (some chips remaining on the processing table 12 need to be manually cleaned into the collection hood 13 periodically). The chips fall from the collection hood 13 into the feed end inside the housing 21. The second motor 261 drives one of the crushing rollers 262 to rotate. The rotating crushing roller 262 is connected to the gear disc. 263 drives another crushing roller 262 to rotate. The two crushing rollers 262 crush the block, strip and roll chips falling from the collection cover 13. After being crushed into smaller chips, they enter the housing 21. The motor 22 drives the rotating shaft 27 and the spiral blade 28 to rotate. During the conveying process, the chips are cut a second time. Since the chips may bend or deform when passing through the crushing roller 262, some chips may be difficult to be completely crushed. Therefore, the serrated groove 29 on the edge of the spiral blade 28 can further cut the incompletely crushed strip or roll chips.

[0043] like Figure 5 As shown, the rotating shaft 27 includes a fixed frame 276 fixed to the inner wall of the housing 21, a shaft 271 with one end fixed to the output shaft of the motor 22, a shaft 272 with both ends rotatably connected to the inner wall of the housing 21 and one side of the fixed frame 276 respectively, an internal gear ring 273 fixed to one side of the shaft 272, a central gear 275 rotatably connected to one side of the fixed frame 276, and a plurality of planetary gears 274. The central gear 275 meshes with the plurality of planetary gears 274, and the plurality of planetary gears 274 mesh with the internal gear ring 273. One end of the shaft 271 passes through the fixed frame 276 and is fixed to one side of the central gear 275. The fixed frame 276 also has a through groove for the passage of chips.

[0044] By adopting the above technical solution, when motor 22 drives shaft 271 to rotate, shaft 271 can drive the central gear 275 to rotate. The rotation of the central gear 275 drives multiple planetary gears 274 to rotate, which in turn drives the internal gear ring 273 and shaft 272 to rotate. Since the number of teeth of the central gear 275 is less than the number of teeth of the internal gear ring 273, the rotational speed of the central gear 275 will be higher than the rotational speed of the internal gear ring 273. This design makes the rotational speed of shaft 271 higher than that of shaft 272. The desired effect is to divide the chip processing inside the housing 21 into a slow processing zone (shaft 272 and the helical blades 28 on the outer surface of shaft 272) and a fast processing zone (shaft 272). The spiral blades 28 on the outer surface of body 271 and shaft 272, while conveying the chips, also produce low shear and tearing effects on the chips, initially crushing the strip or roll chips that are not completely crushed, reducing wear on the spiral blades 28, extending the contact time, and making the initial crushing and loosening process more thorough. The rapid rotation of shaft 271 produces high shear and tearing effects on the chips, crushing the chips more finely, and more effectively handling harder and tougher chips, ensuring that all chips are thoroughly crushed in a short time, reducing the residence time of chips on the shaft, thereby avoiding the risk of chip entanglement and blockage, and can efficiently and reliably handle block, strip and roll chips.

[0045] like Figure 6 and Figure 7 As shown, a tearing and shredding module 3 is also connected inside the housing 21. The tearing and shredding module 3 includes two inner sleeves 35 located inside the housing 21 and a plurality of shearing blades 37 fixed to the inner walls of the two inner sleeves 35. The two inner sleeves 35 are respectively fitted onto the outside of shaft one 271 and shaft two 272. A plurality of spiral blades 28 are fixed at intervals on the outer surfaces of shaft one 271 and shaft two 272. The shearing blades 37 are fixed in a circular array to the inner walls of the inner sleeves 35, and the shearing blades 37 are located in the interval area between two adjacent spiral blades 28.

[0046] By adopting the above technical solution, when the spiral blade 28 drives the chips in the housing 21 to move, the chips located in the gap area between two adjacent spiral blades 28 will come into contact with the shearing blade 37. The shearing blade 37 can contact the chips to achieve the re-cutting of the chips, thereby improving the chip cutting efficiency of the chip removal unit 2.

[0047] like Figure 3 , Figure 6 and Figure 7As shown, the tearing and shredding module 3 also includes two extension ends 32 symmetrically fixed to the outer surface of the housing 21, a motor 31 fixed to the outer surface of the housing 21, a rotating shaft 33 rotatably connected between the two extension ends 32, two gear discs 34 fixed to the outer surface of the rotating shaft 33, a toothed key 36 fixed to the outer surface of the two inner sleeves 35, a movable groove 45 opened inside the housing 21 to accommodate the toothed key 36, and a slot 38 opened inside the housing 21 and connected to the movable groove 45 for exposing the toothed key 36. The two gear discs 34 respectively mesh with the two toothed keys 36, and the output shaft of the motor 31 passes through one of the extension ends 32 and is fixed to one end of the rotating shaft 33.

[0048] By adopting the above technical solution, when the first motor 22 drives the rotating shaft 27 to rotate, the third motor 31 can also drive the second gear disk 34 to rotate. The second gear disk 34 drives the inner sleeve 35 to rotate in the opposite direction to the spiral blade 28 inside the housing 21 through the key 36. At the same time, the shearing blade 37 on the inner wall of the inner sleeve 35 rotates, so that after the chips are initially sheared and crushed by the spiral blade 28, they come into contact with the shearing blade 37 for further shearing and crushing. The counter-rotation of the shearing blade 37 increases the relative speed between the chips and the blade, making the shearing force stronger, enhancing the crushing effect, and extending the service life of the equipment. The combination of the two achieves multiple shearing, which is particularly suitable for processing materials that are difficult to crush, making the chips more finely crushed, reducing the amount of insufficiently crushed strip and roll chips, and preventing them from winding on the rotating shaft 27.

[0049] like Figure 7 - Figure 11 As shown, the housing 21 also includes a shearing assist assembly 4. The shearing assist assembly 4 includes a movable groove 46 formed on the inner wall of the housing 21, a guide post 43 fixed to the inner wall of the movable groove 46, a spring 44 sleeved on the outside of the guide post 43, an annular flange 41 fixed to the outer surface of the inner sleeve 35, a clearance groove 42 formed on one side of the annular flange 41, and a circular flange 47 integrally formed on the inner wall of the movable groove 46. The other end of the guide post 43 is movably inserted into the annular flange 41. The housing 21 has two movable grooves 48 inside to accommodate two inner sleeves 35, and each of the two movable grooves 48 has a discharge slope 49 on one side of its inner wall.

[0050] By adopting the above technical solution, combined with Figure 10As shown, when the inner sleeve 35 rotates, the circular flange 47 moves out of the clearance groove 42. At the same time, the removed circular flange 47 pushes the annular flange 41 and the inner sleeve 35 to move laterally towards the spring 44, causing the spring 44 to contract. Since the annular flange 41 is arranged in a circumferential array on the inner wall of the movable groove 46, when the inner sleeve 35 rotates and drives the clearance groove 42 to move to the next adjacent circular flange 47, the spring 44 pushes the annular flange 41 and the inner sleeve 35 to move towards the circular flange 47. The circular flange 47 re-enters the clearance groove 42. In this way, the inner sleeve 35 and the shearing blade 37 on the inner wall of the inner sleeve 35 can perform a small-distance left-right reciprocating motion inside the housing 21, that is, generate lateral vibration. (When the shearing blade 37 moves left-right reciprocating, it will not contact the spiral blade 28.) The lateral reciprocating motion of the shearing blade 37 can generate additional shearing force when the chips come into contact, making the chips easier to crush. This multi-directional shearing action helps to break the chips into finer pieces, improving crushing efficiency. Lateral vibration effectively prevents chips from accumulating around the shearing blade 37, reducing the possibility of chip clogging. Vibration shakes the chips off the surface of the shearing blade 37, allowing them to be more smoothly conveyed to the next processing stage by the helical blade 28. The reciprocating motion of the shearing blade 37 helps to distribute the chips more evenly inside the housing 21, accelerating their discharge speed. It also allows the shearing blade 37 to make more uniform contact with the chips during cutting, reducing localized wear. This helps to extend the service life of the shearing blade 37.

[0051] Usage: Place the workpiece to be processed on the machining table 12. The multi-axis shifting unit drives the spindle box 18 to move in three axes (XYZ) to adjust the position of the tool mounted on the spindle box 18. The chips generated during processing will flow from the machining table 12 into the collection hood 13 along with the coolant. The chips fall from the collection hood 13 into the feed end inside the housing 21. The pre-crushing module 26 crushes the blocky, strip-shaped, and coiled chips falling from the collection hood 13 into smaller chips before they enter the housing 21. Motor 22 drives rotating shaft 27 and helical blades 28 to rotate. During chip conveying, helical blades 28 perform secondary cutting of the chips via serrated grooves 29. When motor 22 drives shaft 271 to rotate, shaft 271 drives central gear 275 to rotate. Central gear 275 rotates, driving multiple planetary gears 274 to rotate. These planetary gears 274 drive internal gear ring 273 and shaft 272 to rotate, resulting in a higher rotational speed for shaft 271 than for shaft 272. While conveying the chips, the motor also produces low-shearing and tearing effects on them. The rapid rotation of shaft 271 produces high-shearing and tearing effects on the chips, resulting in more refined chip crushing. When motor 22 drives the rotating shaft 27 to rotate, motor 31 also drives the gear disc 34 to rotate. Gear disc 34, through key 36, drives the inner sleeve 35 to rotate within the housing 21 in the opposite direction to the spiral blades 28. Simultaneously, the shearing blades 37 on the inner wall of the inner sleeve 35 rotate, causing the chips to pass through the spiral blades 28. After initial shearing and crushing, the chips come into contact with the shearing blade 37 for further shearing and crushing. The reverse rotation of the shearing blade 37 increases the relative speed between the chips and the blade, resulting in stronger shearing force. When the inner sleeve 35 rotates, the spring 44 and the circular flange 47 enable the inner sleeve 35 and the shearing blade 37 on the inner wall of the inner sleeve 35 to make a small-distance left-right reciprocating motion inside the housing 21. The lateral reciprocating motion of the shearing blade 37 can generate additional shearing force when the chips come into contact, making the chips easier to crush.

[0052] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A bridge-type gantry machining center, comprising a worktable (1), a machining table (12) fixedly connected to the worktable (1), and a multi-axis shifting unit disposed on the worktable (1), characterized in that: The outer surface of the processing table (12) is fixedly connected to a collection cover (13) for collecting coolant and chips, and the lower end of the processing table (12) is fixedly connected to a chip removal unit (2) connected to the collection cover (13) for multi-stage processing of chips. The chip removal unit (2) includes a housing (21) fixed to the lower end of the processing table (12), a motor (22) fixed to one side of the housing (21), a rotating shaft (27) rotatably connected inside the housing (21), multiple spiral blades (28) fixed to the outer surface of the rotating shaft (27), a serrated groove (29) opened at the edge of the spiral blades (28), drainage holes (23) and chip removal ports (24) respectively opened on both sides of the lower end of the housing (21), a dropping hopper (25) connecting the feeding end of the housing (21) to the collection cover (13), and a pre-crushing module (26) set in the feeding end of the housing (21). The output shaft of the motor (22) passes through the housing (21) and is fixed to one end of the rotating shaft (27). The pre-crushing module (26) includes a second motor (261) fixed to one side of the housing (21), two crushing rollers (262) rotatably connected to the inside of the feed end of the housing (21), and two meshing toothed discs (263) rotatably connected to the outer surface of one side of the housing (21) and respectively connected to the two crushing rollers (262). The output shaft of the second motor (261) passes through the housing (21) and is fixed to one side of one crushing roller (262). The shell (21) is also connected to a tearing and shredding module (3), and the tearing and shredding module (3) includes two inner sleeves (35) located inside the shell (21) and a plurality of shearing blades (37) fixed to the inner walls of the two inner sleeves (35). The two inner sleeves (35) are respectively sleeved on the outside of shaft one (271) and shaft two (272); The tearing and shredding module (3) also includes two extension ends (32) symmetrically fixed to the outer surface of the housing (21), a motor three (31) fixed to the outer surface of the housing (21), a rotating shaft (33) rotatably connected between the two extension ends (32), two gear discs two (34) fixed to the outer surface of the rotating shaft (33), a tooth key (36) fixed to the outer surface of the two inner sleeves (35), a movable groove one (45) opened inside the housing (21) to accommodate the tooth key (36), and a slot (38) opened inside the housing (21) and connected to the movable groove one (45) to expose the tooth key (36). The two gear discs two (34) respectively mesh with the two tooth keys (36), and the output shaft of the motor three (31) passes through one of the extension ends (32) and is fixed to one end of the rotating shaft (33). Multiple spiral blades (28) are fixed at intervals on the outer surfaces of shaft one (271) and shaft two (272), and the shearing blades (37) are fixed in a circular array on the inner wall of the inner sleeve (35), and the shearing blades (37) are located in the interval area between two adjacent spiral blades (28). The housing (21) is also provided with a shearing assist component (4). The shearing assist component (4) includes a movable groove (46) opened on the inner wall of the housing (21), a guide post (43) fixed on the inner wall of the movable groove (46), a spring (44) sleeved on the outside of the guide post (43), an annular flange (41) fixed on the outer surface of the inner sleeve (35), a clearance groove (42) opened on one side of the annular flange (41), and a circular flange (47) integrally formed on the inner wall of the movable groove (46). The other end of the guide post (43) is movably inserted into the annular flange (41). The housing (21) has two movable slots (48) inside to accommodate two inner sleeves (35), and each of the two movable slots (48) has a discharge slope (49) on one side of its inner wall.

2. The bridge-type gantry machining center according to claim 1, characterized in that: The rotating shaft (27) includes a fixed frame (276) fixed to the inner wall of the housing (21), a shaft body (271) with one end fixed to the output shaft of motor (22), a shaft body (272) with both ends rotatably connected to the inner wall of the housing (21) and one side of the fixed frame (276), an internal gear ring (273) fixed to one side of the shaft body (272), a central gear (275) rotatably connected to one side of the fixed frame (276), and a plurality of planetary gears (274). The central gear (275) meshes with the plurality of planetary gears (274), and the plurality of planetary gears (274) mesh with the internal gear ring (273). One end of the shaft body (271) passes through the fixed frame (276) and is fixed to one side of the central gear (275).

3. A bridge-type gantry machining center according to claim 2, characterized in that: The fixing frame (276) also has a through groove for the passage of chips.

4. A bridge-type gantry machining center according to claim 1, characterized in that: The upper end of the worktable (1) is also fixedly connected to a enclosure (11) for surrounding the processing table (12). The multi-axis displacement unit includes an X-axis linear movement module (14) set on the upper end of the worktable (1), a support frame (15) fixed on the moving end of the X-axis linear movement module (14), a crossbeam (16) fixed on the upper end of the support frame (15), a Y-axis linear movement module set inside the crossbeam (16), and a Z-axis linear movement module (17) movably connected to one side of the crossbeam (16) and connected to the moving end of the Y-axis linear movement module. The telescopic end of the Z-axis linear movement module (17) is connected to a spindle box (18).

5. A bridge-type gantry machining center according to claim 1, characterized in that: The workbench (1) is equipped with a liquid storage box and a material storage box, which are located below the chip discharge port (24) and the drain hole (23), respectively.

Images