Centrifugal crushing and chip removal device of numerical control machining center

Abstract

The invention belongs to the technical field of chip removal devices, and discloses a centrifugal crushing and chip removal device of a numerical control machining center. The whole chain plate type conveyor is arranged in a Z shape, and the chain plate type conveyor comprises a rack fixedly connected with the base; the fixed shell is mounted at the tail end of a rack of the chain-plank conveyor; the rotary drum is rotatably arranged in the fixed shell, meshes used for discharging cutting fluid are formed in the position, close to the upper portion, of the circumferential side wall of the rotary drum, and ribs protruding inwards in the radial direction are arranged in the lower area of the inner wall of the rotary drum; the rotary drum is arranged at the tail end of the chain plate type conveyor, cuttings can fall into the rotary drum, in the rotating process of the rotary drum, the cuttings and cutting liquid are rapidly separated through centrifugal force, and the cutting liquid is guided into the liquid guide pipe through the liquid passing gap between the rotary drum and the fixed shell and finally flows back to a machining center. Therefore, the utilization rate of the cutting fluid is improved, and the follow-up treatment burden is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of chip removal devices, specifically relating to a centrifugal crushing and chip removal device for CNC machining centers. Background Technology

[0002] CNC machining centers are essential equipment widely used in modern manufacturing. When machining metal parts, they generate a large amount of chips. To ensure smooth machining and maintain a clean working environment, chip removal devices are typically required. These devices primarily remove chips generated during machining from the machining area, preventing chip accumulation from affecting machine operation. They also facilitate the recovery of cutting fluid and subsequent chip processing. Various types of chip removal devices exist, including chain conveyors and spiral conveyors. Their core function is to transport chips along a specific path to the outside of the machine tool or a centralized collection point.

[0003] However, existing chip removal devices still have several shortcomings: First, the cutting fluid separation efficiency is low. Existing chip removal devices can only transport and lift chips. During the transport process, the cutting fluid mainly relies on its own gravity to slowly separate from the chips, resulting in chips still carrying some cutting fluid when discharged. This not only prevents the cutting fluid from being fully recycled but also increases the difficulty of subsequent cleaning and treatment. Second, in actual machining in CNC machining centers, some cutting operations produce long chips. These chips are prone to entanglement during chip removal, causing the chip removal device to malfunction or even be damaged. Furthermore, long chips occupy a large space when stored, making centralized management and processing inconvenient. In addition, existing chip removal devices are usually only responsible for exporting chips and cannot pulverize them. Due to the varying sizes of the chips, uncrushed chips may occupy a large volume when stored, which is not conducive to subsequent storage and transportation. Summary of the Invention

[0004] This invention provides a centrifugal chip crushing and removal device for CNC machining centers, which solves the problems mentioned in the background art, such as low cutting fluid separation efficiency, easy entanglement of long chips, and ineffective chip crushing and storage space occupation during chip conveying.

[0005] The technical solution adopted in this invention is: a centrifugal crushing and chip removal device for CNC machining centers, comprising:

[0006] Base;

[0007] The chain plate conveyor is arranged in a Z-shape and includes a frame that is fixedly connected to the base.

[0008] A fixed housing is installed at the tail end of the frame of the chain conveyor;

[0009] The rotating drum is rotatably mounted inside the fixed housing. The upper part of the circumferential side wall of the rotating drum is provided with a mesh for discharging cutting fluid, and the lower part of the inner wall of the rotating drum is provided with radially inward protruding ribs.

[0010] The crushing seat is installed inside the rotating drum and forms an annular crushing gap with the inner wall of the rotating drum;

[0011] In this process, the chips conveyed by the chain conveyor fall into the rotating drum. During the rotation of the drum, centrifugal force is applied to the chips, which separates the chips from the cutting fluid. Subsequently, the chips move downward under their own gravity and are crushed by the ribs on the inner wall of the rotating drum and the crushing seat during the fall. Finally, the chips are discharged from the rotating drum.

[0012] The upper end of the crushing seat is in the shape of an inverted V or an upwardly convex hemispherical structure. The crushing seat is located directly below the discharge end of the chain conveyor, so that the chips falling from the chain conveyor can land on the crushing seat.

[0013] The outer wall of the crushing seat is tapered with a wider top and a narrower bottom, and the inner cavity of the rotating cylinder is also tapered with a wider top and a narrower bottom. The taper of the inner wall of the rotating cylinder is greater than the taper of the outer wall of the crushing seat, so that the radial dimension of the crushing gap formed between the rotating cylinder and the crushing seat decreases from top to bottom.

[0014] The crushing seat is connected to the fixed housing by locking bolts. There are at least two locking bolts. A spring is sleeved on the outside of the locking bolt. One end of the spring abuts against the inner end face of the head of the locking bolt, and the other end abuts against the outer wall of the fixed housing.

[0015] The rotating drum is mounted inside the fixed housing via bearings, and a gear ring is fixed circumferentially at the upper end of the rotating drum. A downwardly extending support foot is fixed on the frame, and a connecting frame is fixed between the support foot and the fixed housing. A centrifugal motor is fixed on the connecting frame, and a drive wheel is mounted on the shaft end of the centrifugal motor. The drive wheel meshes with the gear ring to drive the rotating drum to rotate.

[0016] An annular fluid passage is provided between the rotating drum and the fixed housing. The fluid passage is used to collect the cutting fluid separated from the chips. An upwardly extending retaining ring is provided below the fixed housing. A fluid guide pipe is installed at the bottom of the fixed housing, and the other end of the fluid guide pipe extends into the CNC machining center.

[0017] The bottom of the fixed housing, and the area inside the retaining ring, has several chip discharge ports evenly distributed around the center of the fixed housing.

[0018] A double-helix conveying mechanism is provided on the base and above the feed end of the chain conveyor. The double-bolt conveying mechanism includes two main shafts that rotate synchronously and in opposite directions. Helical blades are fixed on the circumference of the main shafts. The center distance between the two main shafts is smaller than the outer diameter of the helical blades, so that the outer edge of any helical blade can enter the inner envelope area of ​​the adjacent worm helical blade, thereby forming an interlocking meshing structure between the two helical blades during rotation.

[0019] It also includes a power unit for driving the twin-helix conveyor mechanism to rotate.

[0020] The power unit includes a first gear mounted on the shaft of the chain conveyor, a rotatable worm installed inside the base, the worm being parallel to the axis of the shaft, a second gear meshing with the first gear mounted on the worm, and the worm having two meshing teeth with opposite directions of rotation, the two meshing teeth respectively meshing with worm wheels on two main shafts.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention features a rotatable drum at the end of a chain conveyor, allowing chips to fall into the drum. During the drum's rotation, centrifugal force rapidly separates the chips from the cutting fluid. The cutting fluid is then guided through a fluid passage between the drum and the fixed housing into a fluid guide pipe, ultimately flowing back to the machining center. This achieves efficient cutting fluid recovery, preventing excessive cutting fluid contamination in the discharged chips, thereby improving cutting fluid utilization and reducing subsequent processing burden.

[0023] This invention achieves the above-mentioned separation effect through a rotating drum. At the same time, through the crushing gap formed between the rotating drum and the crushing seat, the chips falling into the drum are subjected to crushing action such as compression and shearing during the rotation of the drum, thereby breaking the chips into relatively uniform particles. The volume of the crushed chips is significantly reduced, which facilitates subsequent centralized stacking and storage management, effectively reduces the space occupied, and improves the convenience of chip transportation and processing.

[0024] This invention employs a double-helix conveying mechanism to perform preliminary crushing and cutting of chips, cutting long strips of chips into suitable lengths, thereby avoiding entanglement during conveying. The double-helix conveying mechanism is also used to pre-crush the chips, reducing their volume and preventing excessively large chips from directly entering the subsequent crushing area, which would reduce the crushing effect and effectively improve the overall crushing effect and efficiency. Attached Figure Description

[0025] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0026] Figure 2 This is a schematic diagram of the tail area of ​​the chip removal device of the present invention;

[0027] Figure 3 This is a structural diagram of the rotating drum of the present invention;

[0028] Figure 4 This is a partial structural diagram of Embodiment 2 of the present invention;

[0029] Figure 5 This is a cross-sectional view of Embodiment 2 of the present invention.

[0030] in:

[0031] 1. Base; 2. Chain conveyor; 201. Baffle; 202. Cover plate; 203. Frame; 3. Support feet; 4. Connecting frame; 5. Centrifugal motor; 6. Drive wheel; 7. Liquid guide pipe; 8. Crushing gap; 9. Locking bolt; 10. Spring; 11. Crushing seat; 12. Rotary drum; 1201. Mesh; 1202. Rib; 13. Liquid passage gap; 14. Fixed housing; 1401. Retaining ring; 1402. Chip discharge port; 15. Gear ring; 16. First gear; 17. Second gear; 18. Worm; 1801. Meshing teeth; 19. Worm wheel; 20. Spiral blade; 21. Main shaft. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figure 1-3 As shown, a centrifugal crushing and chip removal device for a CNC machining center includes a base 1, a chain conveyor 2, a fixed housing 14, a rotating drum 12, a crushing seat 11, etc.

[0035] The base 1 is a shell structure with an open top, used for installation inside the CNC machining center, and serves as the mounting base for the chain conveyor 2.

[0036] The chain conveyor 2 is arranged in a Z-shape, with a horizontally arranged chip inlet at the lower point, an inclined lifting area, and a horizontally arranged chip outlet at the higher point. The chain conveyor 2 includes a frame 203 fixedly connected to the base 1. The frame 203 serves as the main body of the chain conveyor 2, on which a rotating shaft is mounted. A conveyor chain is mounted on the rotating shaft, and a conveyor motor is also mounted on the frame 203 to operate the entire chain conveyor 2. Its drive structure and principle are conventional in existing technology and will not be elaborated further. Furthermore, to prevent chips from falling during lifting and for aesthetic purposes, a cover plate 202 is installed on the frame 203 in the lifting area to cover the lifting area of ​​the chain conveyor 2. To ensure effective lifting, baffles 201 are also installed on the conveyor chain to allow chips to be lifted smoothly. To ensure overall balance, support feet 3 are installed in the lifting area of ​​the frame 203.

[0037] The fixed housing 14 is installed at the tail end of the frame 203 of the chain conveyor 2. It is connected to the frame 203 by bolts. It mainly serves as the mounting base for the internal rotating drum 12 and the crushing seat 11. In order to achieve aesthetics and facilitate the flow of cutting fluid down its inner wall, the fixed housing 14 is designed as a tapered structure that is wider at the top and narrower at the bottom.

[0038] The rotating drum 12 is rotatably mounted inside the fixed housing 14. Near the upper part of its circumferential sidewall, the rotating drum 12 has mesh holes 1201 for discharging cutting fluid. Furthermore, radially inwardly protruding ribs 1202 are provided in the lower region of the inner wall of the rotating drum 12. The mesh holes 1201 on the rotating drum 12 are designed to effectively separate chips and cutting fluid through centrifugation, while the ribs 1202 facilitate chip crushing after solid-liquid separation. Separation and crushing are achieved separately using a single rotating drum 12, simplifying the structure. In addition, to further improve crushing efficiency and effect, the ribs 1202 are designed with an inclined structure on the inner wall of the rotating drum 12. Similarly, a rib structure, such as an inclined or spiral rib structure, is also provided on the outer wall of the crushing seat 11, which can improve the shearing and crushing effect.

[0039] The crushing seat 11 is installed inside the rotating drum 12, forming an annular crushing gap 8 between it and the inner wall of the rotating drum 12. The chips, conveyed by the chain conveyor 2, fall into the rotating drum 12. During rotation, the rotating drum 12 applies centrifugal force to the chips, separating them from the cutting fluid. Subsequently, the chips move downwards under their own gravity, and during their descent, they are crushed by the interaction between the ribs 1202 on the inner wall of the rotating drum 12 and the crushing seat 11, ultimately being discharged from the rotating drum 12.

[0040] The upper end of the crushing seat 11 is an inverted V-shaped or upwardly convex hemispherical structure (in this example, it is an upwardly convex hemispherical structure). The crushing seat 11 is located directly below the discharge end of the chain conveyor 2. The chips falling from the chain conveyor 2 can fall onto the crushing seat 11. This is mainly to allow the chips to move along the outer wall of the crushing seat 11 in all directions after falling, so as to avoid accumulation problems.

[0041] The outer wall of the crushing seat 11 has a tapered structure that is wider at the top and narrower at the bottom, while the inner cavity of the rotating cylinder 12 also has a tapered structure that is wider at the top and narrower at the bottom. The taper of the inner wall of the rotating cylinder 12 is greater than the taper of the outer wall of the crushing seat 11. This causes the radial dimension of the crushing gap 8 formed between the rotating cylinder 12 and the crushing seat 11 to decrease progressively from top to bottom. This design is primarily used to achieve a gradually narrowing crushing path, thereby improving crushing efficiency. That is, as the chips move downwards, they continuously enter smaller gap areas, undergoing progressively stronger compression, shearing, and grinding actions, achieving the purpose of progressive crushing. This results in a more thorough crushing effect, ultimately producing finer and more uniform crushed particles.

[0042] The crushing base 11 is connected to the fixed housing 14 by locking bolts 9. There are at least two locking bolts 9, and springs 10 are sleeved on the outside of each locking bolt 9. One end of the spring 10 abuts against the inner end face of the head of the locking bolt 9, and the other end abuts against the outer wall of the fixed housing 14. By sleeved with springs 10 on the outside of the locking bolts 9, an elastic connection structure with pre-tension is formed between the crushing base 11 and the fixed housing 14. In this way, the springs 10 can absorb and buffer the impact force and vibration during the crushing process, avoiding damage caused by hard collision between the crushing base 11 and the fixed housing 14, and improving the durability of the parts. Furthermore, the elastic connection structure can automatically adjust the crushing gap 8 by a small amount according to the force, making the crushing process more stable and avoiding jamming problems.

[0043] The rotating drum 12 is mounted inside the fixed housing 14 via bearings, and a gear ring 15 is fixed circumferentially at the upper end of the rotating drum 12. A downwardly extending support leg 3 is fixed on the frame 203, and a connecting frame 4 is fixed between the support leg 3 and the fixed housing 14. A centrifugal motor 5 is fixed on the connecting frame 4, and a drive wheel 6 is mounted on the shaft end of the centrifugal motor 5. The drive wheel 6 meshes with the gear ring 15 to drive the rotating drum 12 to rotate.

[0044] An annular fluid passage 13 is provided between the rotating drum 12 and the fixed housing 14. The fluid passage 13 is used to collect the cutting fluid separated from the chips. A retaining ring 1401 extending upward is provided below the fixed housing 14. A fluid guide pipe 7 is installed at the bottom of the fixed housing 14, and the other end of the fluid guide pipe 7 extends into the CNC machining center. Because the fixed housing 14 has a tapered structure that is wider at the top and narrower at the bottom, the cutting fluid can always flow downward along the inner wall of the fixed housing 14 when it flows downward, which can prevent the cutting fluid from flowing directly out of the chip discharge port 1402. The retaining ring 1401 mainly serves to block the cutting fluid from flowing towards the chip discharge port 1402. In practice, retaining rings 1401 of different heights can be designed according to requirements.

[0045] The bottom of the fixed housing 14 and the area inside the retaining ring 1401 are provided with a plurality of chip discharge ports 1402 evenly distributed around the center of the fixed housing 14. The chip discharge ports 1402 are mainly located below the crushing gap 8, so that the crushed chips can fall directly down through the chip discharge ports 1402. In practice, a chip collection cart is placed below the chip discharge ports 1402.

[0046] Example 2

[0047] like Figure 4-5 As shown, this embodiment is based on the above embodiment one. A double helical conveying mechanism is provided on the base 1 and above the feed end of the chain plate conveyor 2. The double bolt conveying mechanism includes two synchronously rotating main shafts 21 with opposite rotation directions. The main shafts 21 are mounted on the base 1 and the cover plate 202 of the chain plate conveyor 2 through bearings. Helical blades 20 are fixed in the circumferential direction of the main shafts 21. The center distance between the two main shafts 21 is smaller than the outer diameter of the helical blades 20, so that the outer edge of any helical blade 20 can enter the inner envelope area of ​​the helical blades 20 of the adjacent worm 18, thereby forming an interlocking meshing structure of the two helical blades 20 during rotation.

[0048] By installing a double-helix conveying mechanism above the feed end of the chain conveyor 2, and making the two main shafts 21 rotate synchronously but in opposite directions, with the helical blades 20 forming an interlocking structure, the chips are compressed and initially crushed by this double-helix conveying mechanism before entering the chain conveyor. This breaks down long, strip-shaped chips into shorter sizes, significantly reducing the risk of entanglement and lowering the probability of damage to the chain conveyor 2. Furthermore, the interlocking area of ​​the double-helix blades 20 has a certain cutting and crushing effect on the chips, providing a more reliable and suitable initial chip size basis for subsequent crushing processes, thereby improving the overall crushing quality of the system.

[0049] It also includes a power unit for driving the double-helix conveyor mechanism to rotate. In this example, the power unit includes a first gear 16 mounted on the shaft of the chain conveyor 2, a rotatable worm 18 mounted inside the base 1, the worm 18 being parallel to the shaft axis, a second gear 17 meshing with the first gear 16 mounted on the worm 18, and two meshing teeth 1801 with opposite directions of rotation, which mesh with worm wheels 19 on the two main shafts 21 respectively.

[0050] The compact structure of this power unit allows it to directly utilize the power source of the chain conveyor 2, avoiding the need for an additional drive motor and reducing system complexity and cost. Simultaneously, the worm 18 has two oppositely rotating meshing teeth 1801, which can mesh with the worm wheels 19 on the two main shafts 21 respectively, ensuring that the two main shafts 21 rotate synchronously and in opposite directions under the drive of a single worm 18, thus improving transmission consistency and stability.

[0051] During operation, the chips generated during processing first enter the double-helix conveyor mechanism. The chips are initially broken by the squeezing and shearing action of the two helical blades 20, and the long strip chips are cut into appropriate lengths to reduce the risk of entanglement during subsequent conveying. Subsequently, the chips enter the chain plate conveyor 2 and are lifted to the position of the rotating drum 12. Under the high-speed rotation of the rotating drum 12, the chips and cutting fluid are rapidly separated by centrifugal force. The cutting fluid flows back to the machining center along the inner wall of the fixed housing 14 through the liquid guide pipe 7, while the chips fall along the inner cavity of the rotating drum 12. During the fall, they are squeezed, sheared, and ground step by step through the crushing gap 8 to achieve uniform crushing. Finally, the crushed chips are discharged through the chip discharge port 1402, completing the entire process of efficient chip conveying, separation, and crushing.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A centrifugal chip removal device for a numerically controlled machining center, characterized in that, The utility model relates to a cutting chip separation and crushing device for numerical control machining center, including: Base (1); Chain conveyer (2) is arranged in Z shape as a whole, and the chain conveyer (2) includes the rack (203) fixedly connected with the base (1); Fixed shell (14) is installed in the tail end position of the rack (203) of chain conveyer (2); Rotary drum (12) is rotatably arranged in the fixed shell (14), and the circumferential side wall of rotary drum (12) is provided with mesh (1201) for discharging cutting fluid in the position close to the upper part, and the rib (1202) that protrudes radially inward is arranged in the lower area of the inner wall of rotary drum (12); Pulverization seat (11) is installed in the inside of rotary drum (12) and forms annular crushing gap (8) between the inner wall of rotary drum (12); Wherein, the cutting chip guided by chain conveyer (2) falls into rotary drum (12), and rotary drum (12) applies centrifugal force to cutting chip in the process of rotation, so that cutting chip and cutting fluid realize separation;Then, cutting chip moves downward under the action of gravity, and is crushed in the falling process by the rib (1202) of the inner wall of rotary drum (12) and the cooperation of pulverization seat (11), and finally is discharged from rotary drum (12).

2. A centrifugal chip removal device for a numerically controlled machining center according to claim 1, characterized in that, The upper end of pulverization seat (11) is inverted V type or upward convex hemispherical structure, and pulverization seat (11) is located in the position directly below the discharge end of chain conveyer (2), so that the cutting chip falling from chain conveyer (2) can fall on pulverization seat (11).

3. A centrifugal chip removal device for a numerically controlled machining center according to claim 1, characterized in that, The outer wall below pulverization seat (11) is tapered structure that is wide at the top and narrow at the bottom, the inner cavity of rotary drum (12) is tapered structure that is wide at the top and narrow at the bottom, and the taper of the inner wall of rotary drum (12) is greater than the taper of the outer wall of pulverization seat (11), so that the crushing gap (8) between rotary drum (12) and pulverization seat (11) is reduced in radial dimension from top to bottom.

4. A centrifugal chip removal device for a numerically controlled machining center according to claim 1, characterized in that, Pulverization seat (11) is connected with fixed shell (14) through locking bolt (9), the locking bolt (9) is at least two, the locking bolt (9) is externally sleeved with spring (10), one end of spring (10) abuts against the inner side end face of the head of locking bolt (9), and the other end abuts against the outer wall position of fixed shell (14).

5. A centrifugal chip removal device for a numerically controlled machining center according to claim 1, characterized in that, Rotary drum (12) is installed in the inside position of fixed shell (14) through bearing, and the upper end of rotary drum (12) is fixedly provided with gear ring (15) in the circumferential direction, the support leg (3) extending downward is fixed on the rack (203), the connecting frame (4) is fixed between the support leg (3) and fixed shell (14), the centrifugal motor (5) is fixed on the connecting frame (4), the shaft end of centrifugal motor (5) is provided with driving wheel (6), driving wheel (6) is engaged with gear ring (15), and is used for driving rotary drum (12) to rotate.

6. A centrifugal chip removal device for a numerically controlled machining center according to claim 1, characterized in that, Annular liquid passage gap (13) is arranged between rotary drum (12) and fixed shell (14), and is used for collecting cutting fluid separated from cutting chip, the upward extending baffle ring (1401) is arranged below fixed shell (14), the liquid guide pipe (7) is installed at the bottom of fixed shell (14), and the other end of liquid guide pipe (7) extends into numerical control machining center.

7. A centrifugal chip removal device for a numerically controlled machining center according to claim 6, characterized in that, The area of the bottom of the fixed shell (14) and inside the blocking ring (1401) is provided with a plurality of chip ports (1402) uniformly distributed around the center of the fixed shell (14).

8. A centrifugal chip removal device for a numerically controlled machining center according to claim 1, characterized in that, The base (1) is provided with a double helix conveying mechanism above the chain plate conveyor (2) at the feeding end, the double helix conveying mechanism comprises two main shafts (21) rotating synchronously and in opposite directions, and the main shaft (21) is fixed with helical blades (20) in the circumferential direction; the center distance of the two main shafts (21) is less than the outer diameter of the helical blade (20), so that the outer edge of any helical blade (20) can enter the inside envelope area of the adjacent helical blade (20) of the worm (18), so that the two helical blades (20) form a meshing structure in the rotating process.

9. A centrifugal chip removal device for a numerically controlled machining center according to claim 8, characterized in that, The power device for driving the double helix conveying mechanism to rotate is further included.

10. A centrifugal chip removal device for a numerically controlled machining center according to claim 9, characterized in that, The power device comprises a first gear (16) mounted on the rotating shaft of the chain plate conveyor (2), a worm (18) rotatable is mounted inside the base (1), the worm (18) is parallel to the rotating shaft axis, the worm (18) is provided with a second gear (17) engaged with the first gear (16), and the worm (18) has two meshing tooth portions (1801) rotating in opposite directions, and the two meshing tooth portions (1801) are respectively engaged with the worm gears (19) on the two main shafts (21).

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