Five-axis CNC machining milling center

Abstract

The utility model discloses a five-axis CNC (computer numerical control) machining milling center, which belongs to the field of mechanical manufacturing equipment and comprises a lathe bed and a frame, the lathe bed is in sliding connection with a Y-axis sliding table with a worktable, the frame is in sliding connection with an X-axis sliding table, the X-axis sliding table is in sliding connection with a Z-axis sliding table capable of lifting above the worktable, the Z-axis sliding table is provided with a milling component, and the Y-axis sliding table is provided with a milling head. The X-axis sliding table, the Y-axis sliding table and the Z-axis sliding table slide or ascend and descend through a steel cable pulley transmission structure, the steel cable pulley transmission structure comprises a winding drum wound with a steel cable rope and a plurality of lasso pieces installed on the X-axis sliding table, the Y-axis sliding table and the Z-axis sliding table, the steel cable rope and the lasso pieces are connected in a sleeved mode and wound, and the steel cable rope is positioned and transmitted through guiding components at the two ends. The steel cable pulley transmission structure replaces a transmission mode of a synchronous belt, a gear rack or a chain and a chain wheel during sliding and lifting in the X-axis direction, the Y-axis direction and the Z-axis direction, and is suitable for machining workpieces with high frequency, large working stroke and small continuous curved surfaces.

Description

Technical Field

[0001] The utility model discloses a mechanical manufacturing device, in particular to a five-axis CNC machining and milling center. Background Art

[0002] CNC machining milling center is a processing equipment that uses a rotating tool to gradually remove material from a workpiece. It uses various cutting tools along one or more axes to mechanically remove material from the workpiece. It is a machine-operated cutting tool that is programmed and managed by a computer numerical control (CNC) system to accurately remove material from the workpiece.

[0003] When processing workpieces with few continuous curved surfaces, the actual working stroke of the X-axis, Y-axis and Z-axis displacement slides of the five-axis CNC machining and milling center is larger than the working stroke of the A-axis and C-axis rotation, and the working frequency is higher. The sliding of the displacement slides in these three directions mostly adopts a meshing transmission method composed of a synchronous belt and a gear rack or a chain sprocket, and these transmission methods are not suitable for frequent starting. For example, the chain or gear is prone to make a loud noise during operation, especially in the lifting and retracting process with a large working stroke, the chain hanging point and the sprocket are not in the same plane, which is prone to tooth deviation, stuck teeth or even tooth skipping. Secondly, it is not easy to judge after the chain and rack are damaged, which can easily affect the normal machining and milling work of the CNC machining and milling center. Utility Model Content

[0004] The purpose of the utility model is to provide a five-axis CNC machining and milling center in order to solve the above problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a five-axis CNC machining and milling center, comprising a bed and a frame, the bed is slidably connected to a Y-axis slide with a workbench, the frame is slidably connected to an X-axis slide, the X-axis slide is slidably connected to a Z-axis slide that can be raised and lowered above the workbench, and the Z-axis slide is equipped with a milling assembly, the X-axis slide, the Y-axis slide and the Z-axis slide are all slid or raised and lowered through a cable pulley transmission structure, the cable pulley transmission structure includes a drum wound with a cable rope and a plurality of lasso parts installed on the X-axis slide, the Y-axis slide and the Z-axis slide, the cable rope is sleeved and wound on the lasso part, and the cable rope is positioned and transmitted through guide components at both ends.

[0006] Preferably, the guiding component comprises a tensioning screw sleeve assembly, a spherical steel cable head and a guide wheel part, and two groups of steel cables wound around the drum are provided, and two groups of guide wheels are symmetrically provided, one group of steel cables is wound around the guide wheel part on one side, and this group of steel cables is connected to the bed or the frame through the tensioning screw sleeve assembly after passing through the lasso part, and the other group of steel cables is wound around the guide wheel part on the other side, and this group of steel cables is connected to the bed or the frame through the spherical steel cable head after passing through the lasso part.

[0007] Preferably, the turnbuckle assembly comprises a joint with two threaded heads connected to the steel cable and a nut threadedly connected to the threaded heads.

[0008] Preferably, the two sides of the workbench are rotatably connected to the Y-axis slide through support arms, and the support arms rotate around the A-axis through a worm gear transmission, and the workbench rotates around the C-axis through a gear set transmission, and the gear set includes a large gear and a small gear that mesh with each other, and the gear set transmission ratio is 1:7.

[0009] Preferably, the workbench is slidably connected to an electric slider with a tooth block near the gear set, and the tooth block can mesh with the large gear.

[0010] Preferably, a spring is connected to the bottom end of the Y-axis slide, and the other end of the spring is connected to the bed.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] First, the cable pulley transmission structure replaces the synchronous belt, gear rack or chain sprocket transmission method when sliding and lifting in the three directions of X-axis, Y-axis and Z-axis, which is suitable for high-frequency workpiece processing with large continuous curved surface and small stroke;

[0013] Second, the damage of the steel cable can be easily observed by naked eyes, so that maintenance personnel can debug and replace it in time;

[0014] Thirdly, the tensioning screw sleeve assembly can adjust the tension of the steel cable, and the nut can be replaced with a screw sleeve with internal threads and engraved with knurling to achieve the effect of self-locking and anti-loosening;

[0015] Fourthly, the electric slider can be controlled to drive the gear block to engage with the large gear for limiting, thereby alleviating the phenomenon of eccentric tooth misalignment and rotation of the gear set due to poor self-locking when continuously processing workpieces with a low C-axis rotation frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a five-axis CNC machining and milling center;

[0017] Figure 2 It is a schematic diagram of the structure of the frame, Z-axis slide and X-axis slide;

[0018] Figure 3 It is a schematic diagram of the structure of the X-axis slide and the Z-axis slide;

[0019] Figure 4 It is a schematic diagram of the structure of the rear end of the bed;

[0020] Figure 5 It is a structural schematic diagram of the Y-axis slide.

[0021] Figure numerals: 1. frame; 2. bed; 3. workbench; 4. Y-axis slide; 5. bracket arm; 6. back piece; 7. Z-axis slide; 8. X-axis slide; 9. threaded head; 10. guide wheel; 11. steel cable; 12. lasso; 13. worm gear; 14. spherical steel cable head; 15. joint; 16. spring; 17. electric slider; 18. large gear; 19. small gear. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] A five-axis CNC machining center, such as Figure 1-Figure 5 As shown, it includes a bed 2 and a frame 1, the bed 2 is slidably connected to a Y-axis slide 4 with a workbench 3, the frame 1 is slidably connected to an X-axis slide 8, the X-axis slide 8 is slidably connected to a Z-axis slide 7 that can be raised and lowered above the workbench 3, and the Z-axis slide 7 is installed with a milling assembly 6, the X-axis slide 8, the Y-axis slide 4 and the Z-axis slide 7 are all slid or raised and lowered through a cable pulley transmission structure, the cable pulley transmission structure includes a drum wound with a steel cable rope 11 and a plurality of lasso parts 12 installed on the X-axis slide 8, the Y-axis slide 4 and the Z-axis slide 7, the steel cable rope 11 is sleeved and wound on the lasso part 12, and the steel cable rope 11 is positioned and transmitted through the guide components at both ends.

[0024] The guide component includes a tension screw sleeve assembly, a spherical steel cable head 14 and a guide wheel 10, and two groups of steel cables 11 wound with the drum are provided, and two groups of guide wheels 10 are symmetrically provided, one group of steel cables 11 is wound with the guide wheel 10 on one side, and the group of steel cables 11 is connected to the bed 2 or the frame 1 through the tension screw sleeve assembly after being wound through the lasso 12, and the other group of steel cables 11 is wound with the guide wheel 10 on the other side, and the group of steel cables 11 is wound through the lasso 12. 2 is connected to the bed 2 or the frame 1 through the spherical steel cable head 14, and two sets of steel cables 11 are respectively wound through the guide wheel parts 10 on both sides, and the two sets of steel cables 11 are wound on the drum in opposite directions. When the drum rotates, one set of steel cables 11 is wound to pull the X-axis slide 8, the Y-axis slide 4 and the Z-axis slide 7 to slide or rise and fall, and the other set of steel cables 11 is relaxed to make them move, so as to always keep the tension balance on both sides. When the steel cables 11 are damaged, such as wire jumping or wire breaking, it is easy to judge by naked eyes.

[0025] Among them, the tensioning screw sleeve assembly includes a joint 15 with two threaded heads 9 and connected to the steel cable rope 11, and a nut threadedly connected to the threaded head 9. The nut threadedly connected to the two threaded heads 9 can adjust the installation position of the joint 15 within a certain range, and adjust the tensioning force to meet appropriate working conditions when the steel cable rope 11 is relaxed. The nut can be replaced with a screw sleeve with an internal thread. The screw sleeve is reversed to a left-handed thread and is engraved with knurling to achieve a self-locking and anti-loosening effect.

[0026] Among them, the two sides of the workbench 3 are rotatably connected with the Y-axis slide 4 through the support arm 5, and the support arm 5 rotates around the A-axis through the worm gear 13, and the workbench 3 rotates around the C-axis through the gear set. The gear set includes a large gear 18 and a small gear 19 that mesh with each other, and the gear set transmission ratio is 1:7. The worm gear 13 transmission is suitable for the small-amplitude movement and low-frequency working requirements of the A-axis. The transmission is smooth, noiseless and self-locking. The gear set is suitable for the flexible and high-precision working requirements of the C-axis. The transmission accuracy is high, reliable and stable, and the transmission noise is small.

[0027] Among them, the workbench 3 is slidably connected with an electric slider 17 with a tooth block near the gear group, and the tooth block can mesh with the large gear 18. When processing a workpiece with a low C-axis rotation frequency, the electric slider 17 is driven to slide and drive the tooth block to engage with the large gear 18 for limiting, thereby reducing the phenomenon of eccentric tooth rotation due to poor self-locking property of the gear group during continuous processing.

[0028] Among them, the bottom end of the Y-axis slide 4 is connected to a spring 16, and the other end of the spring 16 is connected to the bed 2. The workbench 3 and the workpiece are installed on the Y-axis slide 4 and require multi-frequency and high-stroke sliding. Its working load is large. The preload is provided by the spring 16 to increase the reliability and tightness of the Y-axis slide 4 when sliding, and prevent the Y-axis slide 4 from being displaced or skewed when sliding.

[0029] The X-axis slide 8, the Y-axis slide 4 and the Z-axis slide 7 are all slid or lifted by the cable pulley transmission structure. The X-axis slide 8 is taken as an example here: when it is necessary to drive the X-axis slide 8 to slide to the left along the slide rail of the frame 1, the motor drives the drum to rotate clockwise to pull the steel cable rope 11 on the right side along the guide wheel 10 to reel in the direction of the drum, and the steel cable rope 11 on the left side is relaxed under the rotation of the drum, and as the X-axis slide 8 slides to the left, the section of the steel cable rope 11 that is relaxed by the drum is tightened, and the tension balance of the two groups of steel cable ropes 11 is achieved; when it is necessary to drive the X-axis slide 8 to slide to the right, the motor drives the drum to rotate counterclockwise, and the process is opposite to the above direction.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A five-axis CNC machining and milling center, comprising a bed (2) and a frame (1), wherein the bed (2) is slidably connected to a Y-axis slide (4) with a workbench (3), the frame (1) is slidably connected to an X-axis slide (8), the X-axis slide (8) is slidably connected to a Z-axis slide (7) that can be raised and lowered above the workbench (3), and the Z-axis slide (7) is installed with a milling assembly (6), characterized in that: The X-axis slide (8), the Y-axis slide (4) and the Z-axis slide (7) are all slid or lifted by a steel cable pulley transmission structure, the steel cable pulley transmission structure comprising a drum wound with a steel cable (11) and a plurality of lasso parts (12) installed on the X-axis slide (8), the Y-axis slide (4) and the Z-axis slide (7), the steel cable (11) being sleeved and wound on the lasso parts (12), and the steel cable (11) being positioned and transmitted through guide parts at both ends.

2. A five-axis CNC machining and milling center according to claim 1, characterized in that: The guide component comprises a tension screw sleeve assembly, a spherical steel cable head (14) and a guide wheel (10). Two groups of steel cables (11) wound around the drum are provided. Two groups of guide wheels (10) are symmetrically provided. One group of steel cables (11) is wound around the guide wheel (10) on one side, and the steel cables (11) are connected to the bed (2) or the frame (1) through the tension screw sleeve assembly after being wound around the lasso (12). The other group of steel cables (11) is wound around the guide wheel (10) on the other side, and the steel cables (11) are connected to the bed (2) or the frame (1) through the spherical steel cable head (14) after being wound around the lasso (12).

3. A five-axis CNC machining and milling center according to claim 2, characterized in that: The turnbuckle assembly comprises a joint (15) with two threaded heads (9) connected to the steel cable (11) and a nut threadedly connected to the threaded heads (9).

4. A five-axis CNC machining and milling center according to claim 1, characterized in that: The two sides of the workbench (3) are rotatably connected to the Y-axis slide (4) via support arms (5), and the support arms (5) are driven to rotate around the A axis via a worm gear (13), and the workbench (3) is driven to rotate around the C axis via a gear set, wherein the gear set includes a large gear (18) and a small gear (19) that mesh with each other, and the gear set transmission ratio is 1:

7.

5. A five-axis CNC machining and milling center according to claim 4, characterized in that: The working table (3) is slidably connected to an electric slide block (17) with a tooth block near the gear set, and the tooth block can mesh with the large gear (18).

6. A five-axis CNC machining and milling center according to any one of claims 1 to 5, characterized in that: The bottom end of the Y-axis slide (4) is connected to a spring (16), and the other end of the spring (16) is connected to the bed (2).

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