Gantry type numerical control gear edge milling chamfering machine

Abstract

The utility model belongs to the technical field of gear machining equipment, and particularly relates to a gantry type numerical control gear edge milling chamfering machine. Comprising a base and a portal frame body, a rotating workbench is arranged on the base, a large gear ring self-centering clamp is arranged on the rotating workbench, a first transverse moving mechanism, a first vertical moving mechanism, a first front-back moving mechanism and a first rotating table are arranged on the left side of a cross beam of the portal frame body, and a first edge milling and chamfering mechanism is arranged at the bottom of the first rotating table; a second transverse moving mechanism, a second vertical moving mechanism, a second front-back moving mechanism and a second rotating table are arranged on the right side of the cross beam, and a second edge milling and chamfering mechanism is arranged at the bottom of the second rotating table. The first edge milling and chamfering comprises an upper chamfering mechanism capable of adjusting the angle of a tool bit and a first edge milling mechanism. The second edge milling and chamfering mechanism comprises a lower chamfering mechanism capable of adjusting the angle of a tool bit and a second edge milling mechanism. The edge milling and chamfering machine is high in machining efficiency and machining precision.

Description

Technical Field

[0001] This utility model belongs to the technical field of gear processing equipment, and in particular relates to a gantry-type CNC gear milling and chamfering machine. Background Technology

[0002] Milling and chamfering are important processes in gear manufacturing. They can remove burrs and sharp corners from gear edges, effectively reduce quenching cracks, reduce stress concentration, reduce gear meshing noise, and improve gear meshing quality and lifespan.

[0003] With the rapid development of the machinery and equipment manufacturing industry, the market demand for large machinery such as mining machinery, railway machinery, printing machinery, marine gearboxes, especially slewing bearings for engineering machinery and wind power has increased rapidly, leading to a corresponding increase in the manufacturing of large gears. However, during the milling and chamfering process of large gears, due to structural limitations, the equipment is not suitable for processing even larger gears. Traditional large gear ring fixtures are mainly pressure plate type tooling. After placing the large gear ring on the bracket, the gear ring is manually tapped and adjusted to be centered before being pressed and fixed by the pressure plate. The pressure plate type tooling has a relatively simple structure. However, due to the large diameter of the gear shaper and the slow rotation of the gear shaper's rotary table, the quality of the processed products is greatly affected by the skill level of the workers, and the long alignment time affects production efficiency. Furthermore, traditional chamfering is done manually, which is inefficient and prone to damaging the tooth surface if not careful, making it difficult to guarantee quality. Therefore, ultra-large gear grinding and chamfering machine tools are necessary to improve the processing capabilities of enterprises.

[0004] Patent document 202010363288.4 discloses a gantry-type gear chamfering machine. This gear chamfering machine uses a column mounted on a gantry frame to concentrate the chamfering spindle on a single column. Although the chamfering machine tool in this patent document can chamfer both the upper and lower parts of a large gear ring simultaneously, its function is limited, and fixing the large gear ring is relatively complex, affecting the overall processing efficiency and accuracy. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies and provide a gantry-type CNC gear milling and chamfering machine with high processing efficiency and precision.

[0006] The objective of this utility model is achieved through the following technical solutions:

[0007] A gantry-type CNC gear milling and chamfering machine, characterized in that: it includes a base and a gantry frame body; a rotary worktable is provided on the base, and a large gear ring self-centering fixture is provided on the rotary worktable; a first transverse moving mechanism is provided on the left side of the crossbeam of the gantry frame body, a first vertical moving mechanism is provided on the first transverse moving mechanism, a first forward and backward moving mechanism is provided on the first vertical moving mechanism, a first rotary table is provided at the bottom of the first forward and backward moving mechanism, and a first milling and chamfering mechanism is provided at the bottom of the first rotary table; a second transverse moving mechanism is provided on the right side of the crossbeam, a second vertical moving mechanism is provided on the second transverse moving mechanism, a second forward and backward moving mechanism is provided on the second vertical moving mechanism, a second rotary table is provided at the bottom of the second forward and backward moving mechanism, and a second milling and chamfering mechanism is provided at the bottom of the second rotary table.

[0008] The first milling and chamfering mechanism includes a first tool holder, and an upper chamfering mechanism with an adjustable tool head angle is provided on one side of the first tool holder; a first milling mechanism with an adjustable tool head angle is provided on the side of the first tool holder opposite to the upper chamfering mechanism.

[0009] The second milling and chamfering mechanism includes a second tool holder, and a lower chamfering mechanism with an adjustable tool head angle is provided on one side of the second tool holder; a second milling mechanism with an adjustable tool head angle is provided on the side of the second tool holder opposite to the lower chamfering mechanism.

[0010] Based on the above structure, after the large gear ring is precisely and automatically clamped by the self-centering fixture, the upper and lower chamfering mechanisms work together to chamfer the large gear ring at the same time. Alternatively, the first and second milling mechanisms can be used to symmetrically mill the inner side of the large gear ring at the same time, which improves both processing efficiency and processing accuracy.

[0011] Furthermore, the large gear ring self-centering fixture of this utility model includes a fixture base and a hydraulic chuck fixed at the center of the fixture base. The hydraulic chuck is evenly provided with multiple jaws along the circumference. Each jaw is fixed with a pull rod facing outward. The pull rod is arranged radially along the hydraulic chuck. Multiple pull rods are on the same horizontal plane. One end of the pull rod is connected to the jaw, and the other end of the pull rod is connected to a clamping block. The clamping block is slidably arranged on the fixture base.

[0012] The clamping block has an L-shaped longitudinal section and includes a horizontally arranged support plate and a vertically arranged stop block on the outside of the support plate. The stop block is perpendicular to the support plate, and the L-shaped angle formed by the stop block and the support plate is directed toward the central axis of the hydraulic chuck. Multiple support plates are all on the same horizontal plane, and multiple stop blocks are all equidistant from the central axis of the hydraulic chuck.

[0013] Preferably, the upper chamfering mechanism of this utility model includes a first chamfering tool holder rotatably mounted on a first tool holder, and the first chamfering tool holder includes a first base plate and first side plates vertically mounted on both sides of the first base plate;

[0014] The first base plate is rotatably mounted on the first tool holder. The first base plate is provided with a first arc-shaped groove. The center of the circle containing the first arc-shaped groove coincides with the rotation point of the first base plate on the first tool holder. The first tool holder is provided with a first slider that cooperates with the first arc-shaped groove. The first base plate rotates along the first arc-shaped groove.

[0015] An upper chamfering machine body is rotatably mounted between two first side plates. A second arc-shaped slide groove is provided on the first side plate. The center of the circle containing the second arc-shaped slide groove coincides with the rotation point of the upper chamfering machine body on the first side plate. A second slider that cooperates with the second arc-shaped slide groove is provided on the upper chamfering machine body. The upper chamfering machine body rotates along the second arc-shaped slide groove, and the cutter head of the upper chamfering machine body is set downward.

[0016] Furthermore, the lower chamfering mechanism of this utility model includes a second chamfering tool holder rotatably mounted on a second tool holder, the second chamfering tool holder including a second base plate and second side plates vertically mounted on both sides of the second base plate;

[0017] The second base plate is rotatably mounted on the second tool holder. A third arc-shaped groove is provided on the second base plate. The center of the circle containing the third arc-shaped groove coincides with the rotation point of the second base plate on the second tool holder. A third slider that cooperates with the third arc-shaped groove is provided on the second tool holder. The second base plate rotates along the third arc-shaped groove.

[0018] A lower chamfering machine body is rotatably mounted between two second side plates. A fourth arc-shaped slide groove is provided on the second side plate. The center of the circle containing the fourth arc-shaped slide groove coincides with the rotation point of the lower chamfering machine body on the second side plate. A fourth slider that cooperates with the fourth arc-shaped slide groove is provided on the lower chamfering machine body. The lower chamfering machine body rotates along the fourth arc-shaped slide groove, and the cutter head of the lower chamfering machine body is set upward.

[0019] Preferably, the first milling mechanism of this utility model includes a first disc rotatably disposed on a first tool holder, the first disc having a scale, and the first milling machine body fixed to the first disc.

[0020] Preferably, the second milling mechanism of this utility model includes a second disc rotatably disposed on a second tool holder, the second disc having a scale, and the second milling machine body fixed to the second disc.

[0021] Preferably, the first transverse moving mechanism of this utility model includes a first transverse slide rail horizontally arranged on the left side of the crossbeam, a first transverse sliding plate slidably connected on the first transverse slide rail, a first transverse motor provided at the left end of the crossbeam, a first transverse lead screw fixed on the output shaft of the first transverse motor and arranged parallel to the first transverse slide rail, and a first threaded sleeve threadedly connected to the first transverse lead screw on the first transverse sliding plate.

[0022] The first vertical moving mechanism includes a first vertical rod that moves in the vertical direction, a first vertical slider that is arranged in the vertical direction on the first transverse slide plate, a first vertical slide rail that is slidably connected to the first vertical slider on the first vertical rod, a first vertical motor that is arranged at the top of the first vertical rod, a first vertical lead screw that is fixed on the output shaft of the first vertical motor, and a second threaded sleeve that is threadedly connected to the first vertical lead screw that is fixed on the first transverse slide plate.

[0023] The first forward and backward moving mechanism includes a first longitudinal slide rail horizontally arranged at the bottom of the first vertical rod, a first longitudinal slide plate slidably connected on the first longitudinal slide rail, a first longitudinal motor provided at one end of the first longitudinal slide plate, a first longitudinal lead screw fixed on the output shaft of the first longitudinal motor and arranged parallel to the first longitudinal slide rail, and a third threaded sleeve threadedly connected to the first longitudinal lead screw fixed at the bottom of the first vertical rod.

[0024] Preferably, the second transverse moving mechanism of this utility model includes a second transverse slide rail horizontally arranged on the right side of the crossbeam, a second transverse sliding plate slidably connected on the second transverse slide rail, a second transverse motor provided at the right end of the crossbeam, a second transverse lead screw fixed on the output shaft of the second transverse motor and arranged parallel to the second transverse slide rail, and a fourth threaded sleeve threadedly connected to the second transverse lead screw on the second transverse sliding plate.

[0025] The second vertical moving mechanism includes a second vertical rod that moves in the vertical direction, a second vertical slider that is arranged in the vertical direction on the second transverse slide plate, a second vertical slide rail that is slidably connected to the second vertical slider on the second vertical rod, a second vertical motor that is arranged at the top of the second vertical rod, a second vertical lead screw that is fixed on the output shaft of the second vertical motor, and a fifth threaded sleeve that is threadedly connected to the second vertical lead screw that is fixed on the second transverse slide plate.

[0026] The second forward and backward moving mechanism includes a second longitudinal slide rail arranged horizontally at the bottom of the second vertical rod, a second longitudinal slide plate slidably connected to the second longitudinal slide rail, a second longitudinal motor provided at one end of the second longitudinal slide plate, a second longitudinal lead screw arranged parallel to the second longitudinal slide rail fixed on the output shaft of the second longitudinal motor, and a sixth threaded sleeve threadedly connected to the second longitudinal lead screw fixed at the bottom of the second vertical rod.

[0027] Compared with the prior art, this utility model has the following features and beneficial effects:

[0028] 1. This equipment uses a self-centering fixture to precisely and automatically clamp the large gear ring. Then, through the cooperation of the upper and lower chamfering mechanisms, the large gear ring is chamfered on both the upper and lower sides simultaneously. Alternatively, the first and second milling mechanisms can be used to symmetrically mill the inner side of the large gear ring at the same time, which improves both processing efficiency and processing accuracy.

[0029] 2. After the large gear ring is placed on the support plate, the hydraulic chuck pulls the jaws at the same time. The jaws drive the clamping blocks to lock synchronously through the pull rod. Multiple clamping blocks pull the large gear ring towards the central axis of the hydraulic chuck at the same time, which can realize accurate and fast self-centering clamping of the large gear ring, thereby improving the machining accuracy and machining efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 .

[0031] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0032] Figure 3 This is a schematic diagram of the self-centering fixture for the large gear ring of this utility model.

[0033] Figure 4 This is a schematic diagram of the first milling and chamfering mechanism of this utility model.

[0034] Figure 5 This is a schematic diagram of the second milling and chamfering mechanism of this utility model.

[0035] In the diagram: 1. Base; 2. Gantry frame body; 3. Rotary worktable; 4. Large gear self-centering fixture; 5. First transverse movement mechanism; 6. First vertical movement mechanism; 7. First forward and backward movement mechanism; 8. First rotary table; 9. Second transverse movement mechanism; 10. Second forward and backward movement mechanism; 11. Second rotary table; 12. First tool holder; 13. Upper chamfering mechanism; 14. First milling mechanism; 15. Second tool holder; 16. Lower chamfering mechanism; 17. Second milling mechanism; 18. Fixture base; 19. Hydraulic chuck; 20. Claw; 21. Pull rod; 22. Clamping block; 23. Support plate; 24. Stop block; 25. First transverse slide rail; 26. First transverse sliding plate; 27. First transverse motor; 28. First transverse lead screw; 29. ​​First vertical rod; 30. First vertical slider; 31. First vertical slide rail; 32. First vertical lead screw; 33. First longitudinal slide rail. 4. First longitudinal slide plate 35, first longitudinal motor 36, first longitudinal lead screw 37, second transverse slide rail 38, second transverse slide plate 39, second transverse motor 40, second transverse lead screw 41, second vertical rod 42, second vertical slider 43, second vertical slide rail 44, second vertical motor 45, second vertical lead screw 46, second longitudinal slide rail 47, second longitudinal slide plate 48, second longitudinal motor 49, second longitudinal lead screw 50, first base plate 51, first side plate 52, first arc-shaped slide groove 53, upper chamfering machine body 54, second arc-shaped slide groove 55, second base plate 56, second side plate 57, third arc-shaped slide groove 58, lower chamfering machine body 59, fourth arc-shaped slide groove 60, first disc 61, first milling machine body 62, second disc 63, second milling machine body 64, first vertical motor 65. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings.

[0037] A gantry-type CNC gear milling and chamfering machine includes a base 1 and a gantry frame body 2. A rotary worktable 3 is provided on the base 1, and a large gear ring self-centering fixture 4 is provided on the rotary worktable 3. A first transverse moving mechanism 5 is provided on the left side of the crossbeam of the gantry frame body 2. A first vertical moving mechanism 6 is provided on the first transverse moving mechanism 5. A first front-back moving mechanism 7 is provided on the first vertical moving mechanism 6. A first rotary table 8 is provided at the bottom of the first front-back moving mechanism 7. A first milling and chamfering mechanism is provided at the bottom of the first rotary table 8. A second transverse moving mechanism 9 is provided on the right side of the crossbeam. A second vertical moving mechanism 10 is provided on the second transverse moving mechanism 9. A second front-back moving mechanism 11 is provided on the second vertical moving mechanism 10. A second rotary table 12 is provided at the bottom of the second front-back moving mechanism 11. A second milling and chamfering mechanism is provided at the bottom of the second rotary table 12.

[0038] The first milling and chamfering mechanism includes a first tool holder 13, an upper chamfering mechanism 14 with an adjustable tool head angle is provided on one side of the first tool holder 13, and a first milling mechanism 15 with an adjustable tool head angle is provided on the side of the first tool holder 13 opposite to the upper chamfering mechanism 14.

[0039] The second milling and chamfering mechanism includes a second tool holder 16, a lower chamfering mechanism 17 with an adjustable tool head angle is provided on one side of the second tool holder 16, and a second milling mechanism 18 with an adjustable tool head angle is provided on the side of the second tool holder 16 opposite to the lower chamfering mechanism 17.

[0040] Based on the above structure, after the large gear ring is precisely and automatically clamped by the large gear ring self-centering fixture 4, the upper and lower chamfering mechanisms 14 and 17 work together to chamfer the large gear ring at the same time. Alternatively, the first milling mechanism 15 and the second milling mechanism 18 can be used to symmetrically mill the inner side of the large gear ring at the same time, which improves both processing efficiency and processing accuracy.

[0041] The large gear self-centering fixture 4 includes a fixture base 19 and a hydraulic chuck 20 fixed at the center of the fixture base 19. Multiple jaws 21 are evenly arranged along the circumference of the hydraulic chuck 20. Each jaw 21 is fixed with a pull rod 22 facing outwards. The pull rods 22 are arranged radially along the hydraulic chuck 20, and multiple pull rods 22 are on the same horizontal plane. One end of the pull rod 22 is connected to the jaw 21, and the other end is connected to a clamping block 23. The clamping block 23 is slidably mounted on the fixture base 19. The clamping block 23 has an L-shaped longitudinal section and includes a horizontally arranged support plate 24 and a vertically arranged stop block 25 on the outside of the support plate 24. The stop block 25 is perpendicular to the support plate 24, and the L-shaped angle formed by the stop block 25 and the support plate 24 is directed towards the central axis of the hydraulic chuck 20. Multiple support plates 24 are all on the same horizontal plane, and multiple stop blocks 25 are equidistant from the central axis of the hydraulic chuck 20.

[0042] After the large gear ring is placed on the support plate 24, the hydraulic chuck 20 pulls the jaws 21 at the same time. The jaws 21 drive the clamping blocks 23 to lock synchronously through the pull rod 22. The multiple clamping blocks 23 pull the large gear ring towards the central axis of the hydraulic chuck 20 at the same time, which can realize accurate and fast self-centering clamping of the large gear ring.

[0043] The first transverse moving mechanism 5 includes a first transverse slide rail 26 horizontally disposed on the left side of the crossbeam. A first transverse sliding plate 27 is slidably connected to the first transverse slide rail 26. A first transverse motor 28 is disposed at the left end of the crossbeam. A first transverse lead screw 29, parallel to the first transverse slide rail 26, is fixed on the output shaft of the first transverse motor 28. A first threaded sleeve, threadedly connected to the first transverse lead screw 29, is disposed on the first transverse sliding plate 27. The rotation of the first transverse motor 28 drives the first transverse lead screw 29 to rotate. Under the action of the first threaded sleeve, the first transverse sliding plate 27 moves on the first transverse lead screw 29 and simultaneously moves along the first transverse slide rail 26. The first transverse sliding plate 27 drives the first vertical moving mechanism 6 to move left and right.

[0044] The first vertical moving mechanism 6 includes a first vertical rod 30 that moves vertically, a first vertical slider 31 that is vertically positioned on the first horizontal slide plate 27, a first vertical slide rail 32 that is slidably connected to the first vertical slider 31 on the first vertical rod 30, a first vertical motor 65 at the top of the first vertical rod 30, a first vertical lead screw 33 fixed to the output shaft of the first vertical motor 65, and a second threaded sleeve that is threadedly connected to the first vertical lead screw 33 fixed to the first horizontal slide plate 27. The rotation of the first vertical motor 65 drives the first vertical lead screw 33 to rotate, causing the first vertical lead screw 33 to move up and down on the second threaded sleeve, simultaneously driving the first vertical rod 30 to move up and down on the first vertical slide rail 32 in cooperation with the first vertical slider 31. The first vertical rod 30 drives the first forward and backward moving mechanism 7 to move up and down.

[0045] The first forward and backward moving mechanism 7 includes a first longitudinal slide rail 34 horizontally arranged at the bottom of the first vertical rod 30. A first longitudinal slide plate 35 is slidably connected to the first longitudinal slide rail 34. A first longitudinal motor 36 is provided at one end of the first longitudinal slide plate 35. A first longitudinal lead screw 37, parallel to the first longitudinal slide rail 34, is fixed on the output shaft of the first longitudinal motor 36. A third threaded sleeve, threadedly connected to the first longitudinal lead screw 37, is fixed at the bottom of the first vertical rod 30. The rotation of the first longitudinal motor 36 drives the first longitudinal lead screw 37 to rotate, and the first longitudinal lead screw 37 moves back and forth on the third threaded sleeve, simultaneously driving the first longitudinal slide plate 35 to move back and forth along the first longitudinal slide rail 34. The first longitudinal slide plate 35 drives the first rotary table 8 and the first milling and chamfering mechanism provided at its bottom to move to a designated position.

[0046] The second transverse moving mechanism 9 includes a second transverse slide rail 38 horizontally positioned on the right side of the crossbeam. A second transverse sliding plate 39 is slidably connected to the second transverse slide rail 38. A second transverse motor 40 is located at the right end of the crossbeam. A second transverse lead screw 41, parallel to the second transverse slide rail 38, is fixed to the output shaft of the second transverse motor 40. A fourth threaded sleeve, threadedly connected to the second transverse lead screw 41, is provided on the second transverse sliding plate 38. Rotation of the second transverse motor 40 drives the second transverse lead screw 41 to rotate. The second transverse sliding plate 39 moves along the second transverse slide rail 38 simultaneously, driven by the fourth threaded sleeve. The second transverse sliding plate 39 then drives the second vertical moving mechanism 10 to move left and right.

[0047] The second vertical moving mechanism 10 includes a second vertical rod 42 that moves vertically, a second vertical slider 43 that is vertically positioned on the second horizontal slide plate 39, a second vertical slide rail 44 that is slidably connected to the second vertical slider 43 on the second vertical rod 42, a second vertical motor 45 at the top of the second vertical rod 42, a second vertical lead screw 46 fixed to the output shaft of the second vertical motor 45, and a fifth threaded sleeve that is threadedly connected to the second vertical lead screw 46 fixed on the second horizontal slide plate 39. The rotation of the second vertical motor 45 drives the second vertical lead screw 46 to rotate, causing the second vertical lead screw 46 to move up and down on the fifth threaded sleeve, simultaneously driving the second vertical rod 42 to move up and down on the second vertical slide rail 44 in cooperation with the second vertical slider 43. The second vertical rod 42 then drives the second forward and backward moving mechanism 11 to move up and down.

[0048] The second forward and backward moving mechanism 11 includes a second longitudinal slide rail 47 horizontally arranged at the bottom of the second vertical rod 42. A second longitudinal slide plate 48 is slidably connected to the second longitudinal slide rail 47. A second longitudinal motor 49 is provided at one end of the second longitudinal slide plate 48. A second longitudinal lead screw 50, parallel to the second longitudinal slide rail 47, is fixed on the output shaft of the second longitudinal motor 49. A sixth threaded sleeve, threadedly connected to the second longitudinal lead screw 50, is fixed at the bottom of the second vertical rod 42. The rotation of the second longitudinal motor 49 drives the second longitudinal lead screw 50 to rotate, and the second longitudinal lead screw 50 moves back and forth on the sixth threaded sleeve, simultaneously driving the second longitudinal slide plate 48 to move back and forth along the second longitudinal slide rail 47. The second longitudinal slide plate 48 drives the second rotary table 12 and the second milling and chamfering mechanism located at its bottom to move to a designated position.

[0049] The upper chamfering mechanism 14 includes a first chamfering tool holder rotatably mounted on a first tool holder 13. The first chamfering tool holder includes a first base plate 51 and first side plates 52 vertically mounted on both sides of the first base plate 51. The first base plate 51 is rotatably mounted on the first tool holder 13. A first arc-shaped groove 53 is formed on the first base plate 51. The center of the circle containing the first arc-shaped groove 53 coincides with the rotation point of the first base plate 51 on the first tool holder 13. A first slider is provided on the first tool holder 13 to cooperate with the first arc-shaped groove 53. The first base plate 51 rotates along the first arc-shaped groove 53. An upper chamfering machine body 54 is rotatably mounted between two first side plates 52. A second arc-shaped groove 55 is formed on the first side plate 52. The center of the circle containing the second arc-shaped groove 55 coincides with the rotation point of the upper chamfering machine body 54 on the first side plate 52. A second slider that mates with the second arc-shaped groove 55 is provided on the upper chamfering machine body 54. The upper chamfering machine body 54 rotates along the second arc-shaped groove 55, with the cutting head of the upper chamfering machine body 54 facing downwards. The rotation of the first base plate 51 causes the upper chamfering machine body 54 to rotate horizontally to the desired angle, and the upper chamfering machine body 54 is adjusted vertically to the desired angle on the first side plate 52.

[0050] The lower chamfering mechanism 17 includes a second chamfering tool holder rotatably mounted on a second tool holder 16. The second chamfering tool holder includes a second base plate 56 and second side plates 57 perpendicularly mounted on both sides of the second base plate 56. The second base plate 56 is rotatably mounted on the second tool holder 16. A third arc-shaped groove 58 is formed on the second base plate 56. The center of the circle containing the third arc-shaped groove 58 coincides with the rotation point of the second base plate 56 on the second tool holder 16. A third slider is provided on the second tool holder 56 to cooperate with the third arc-shaped groove 58. The second base plate 56 rotates along the third arc-shaped groove 58. A chamfering machine body 59 is rotatably mounted between two second side plates 57. A fourth arc-shaped groove 60 is formed on the second side plate 57. The center of the circle containing the fourth arc-shaped groove 60 coincides with the rotation point of the chamfering machine body 59 on the second side plate 57. A fourth slider that mates with the fourth arc-shaped groove 60 is provided on the chamfering machine body 59. The chamfering machine body 59 rotates along the fourth arc-shaped groove 60, with the cutting head of the chamfering machine body 59 facing upwards. The rotation of the second base plate 56 causes the chamfering machine body 59 to rotate horizontally to the desired angle, and the chamfering machine body 59 is adjusted vertically to the desired angle on the second side plate 57.

[0051] The first milling mechanism 15 includes a first disk 61 rotatably mounted on the first tool holder 13. The first disk 61 is provided with a scale. The first milling machine body 62 is fixed to the first disk 61. The angle of the first milling machine body 62 can be precisely adjusted according to the inclination of the teeth of the gear being processed by the first disk 61.

[0052] The second milling mechanism 18 includes a second disk 63 rotatably mounted on the second tool holder 16. The second disk 63 has a scale, and the second milling machine body 64 is fixed to the second disk 63. The angle of the second milling machine body 64 can be precisely adjusted according to the inclination of the teeth of the gear being processed by the second disk 63.

[0053] The working process of this equipment is as follows:

[0054] After the large gear ring is placed on the support plate 24, the hydraulic chuck 20 pulls the jaws 21 at the same time. The jaws 21 drive the clamping blocks 23 to lock synchronously through the pull rod 22. The multiple clamping blocks 23 pull the large gear ring towards the central axis of the hydraulic chuck 20 at the same time, which can realize accurate and fast self-centering clamping of the large gear ring.

[0055] When chamfering the large gear ring, the first lateral movement mechanism 5, the first vertical movement mechanism 6, the first front-to-back movement mechanism 7, and the first rotary table 8 each move according to instructions, moving the upper chamfering mechanism 14 to the designated position. The rotation of the first base plate 51 causes the upper chamfering machine body 54 to rotate horizontally to the required angle, and the upper chamfering machine body 54 is adjusted vertically to the required angle on the first side plate 52. At this time, the upper chamfering machine body 54 is above the large gear ring, and the cutting head of the upper chamfering machine body 54 is aligned with the position to be processed. The second lateral movement mechanism 9, the second vertical movement mechanism 10, the second front-to-back movement mechanism 11, and the second rotary table 12 each move according to instructions, moving the lower chamfering mechanism 14 to the designated position. The rotation of the second base plate 56 causes the lower chamfering machine body 59 to rotate horizontally to the required angle, and the lower chamfering machine body 59 is adjusted vertically to the required angle on the second side plate 57. At this time, the lower chamfering machine body 59 is below the large gear ring, and the cutting head of the lower chamfering machine body 59 is aligned with the position to be processed. With the help of the rotary worktable located at the bottom of the self-centering fixture 4 for the large gear ring, the upper chamfering machine body 54 and the lower chamfering machine body 59 simultaneously chamfer the upper and lower sides of the large gear ring. This effectively improves the stability and machining accuracy of the large gear ring during chamfering.

[0056] When milling the internal teeth of the large gear ring, the first lateral movement mechanism 5, the first vertical movement mechanism 6, the first forward and backward movement mechanism 7, and the first rotary table 8 each move according to instructions, moving the first milling mechanism 45 to a designated position. The angle of the first milling machine body 62 can be precisely adjusted according to the inclination of the teeth being processed via the first disc 61. At this time, the first milling mechanism 15 is aligned with the teeth on the left side inside the large gear ring. The second lateral movement mechanism 9, the second vertical movement mechanism 10, the second forward and backward movement mechanism 11, and the second rotary table 12 each move according to instructions, moving the second milling mechanism 18 to a designated position. The angle of the second milling machine body 64 can be precisely adjusted according to the inclination of the teeth being processed via the second disc 63. At this time, the second milling mechanism 18 is aligned with the teeth on the right side inside the large gear ring. The first milling mechanism 15 and the second milling mechanism 18 simultaneously and symmetrically mill the internal teeth of the large gear ring. This process is highly efficient and effectively improves the stability of the large gear ring during chamfering, thereby increasing its processing accuracy.

[0057] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A gantry-type CNC gear milling and chamfering machine, characterized in that: The system includes a base and a gantry frame body. The base is equipped with a rotary worktable, and the rotary worktable is equipped with a large gear self-centering fixture. The left side of the crossbeam of the gantry frame body is equipped with a first lateral moving mechanism, which in turn is equipped with a first vertical moving mechanism. The first vertical moving mechanism is equipped with a first forward and backward moving mechanism, and the bottom of the first forward and backward moving mechanism is equipped with a first rotating platform. The bottom of the first rotating platform is equipped with a first milling and chamfering mechanism. The right side of the crossbeam is equipped with a second lateral moving mechanism, which in turn is equipped with a second vertical moving mechanism. The second vertical moving mechanism is equipped with a second forward and backward moving mechanism, and the bottom of the second forward and backward moving mechanism is equipped with a second rotating platform. The bottom of the second rotating platform is equipped with a second milling and chamfering mechanism. The first milling and chamfering mechanism includes a first tool holder, and an upper chamfering mechanism with an adjustable tool head angle is provided on one side of the first tool holder; a first milling mechanism with an adjustable tool head angle is provided on the side of the first tool holder opposite to the upper chamfering mechanism. The second milling and chamfering mechanism includes a second tool holder, and a lower chamfering mechanism with an adjustable tool head angle is provided on one side of the second tool holder; a second milling mechanism with an adjustable tool head angle is provided on the side of the second tool holder opposite to the lower chamfering mechanism.

2. The gantry-type CNC gear milling and chamfering machine according to claim 1, characterized in that: The large gear self-centering fixture includes a fixture base and a hydraulic chuck fixed at the center of the fixture base. The hydraulic chuck has multiple jaws evenly arranged along its circumference. Each jaw has a pull rod fixed to its outward side. The pull rods are arranged radially along the hydraulic chuck. The multiple pull rods are on the same horizontal plane. One end of the pull rod is connected to the jaw, and the other end of the pull rod is connected to a clamping block. The clamping block is slidably arranged on the fixture base. The clamping block has an L-shaped longitudinal section and includes a horizontally arranged support plate and a vertically arranged stop block on the outside of the support plate. The stop block is perpendicular to the support plate, and the L-shaped angle formed by the stop block and the support plate is directed toward the central axis of the hydraulic chuck. Multiple support plates are all on the same horizontal plane, and multiple stop blocks are all equidistant from the central axis of the hydraulic chuck.

3. The gantry-type CNC gear milling and chamfering machine according to claim 1 or 2, characterized in that: The upper chamfering mechanism includes a first chamfering tool holder rotatably mounted on a first tool holder, and the first chamfering tool holder includes a first base plate and first side plates vertically mounted on both sides of the first base plate. The first base plate is rotatably mounted on the first tool holder. The first base plate is provided with a first arc-shaped groove. The center of the circle containing the first arc-shaped groove coincides with the rotation point of the first base plate on the first tool holder. The first tool holder is provided with a first slider that cooperates with the first arc-shaped groove. The first base plate rotates along the first arc-shaped groove. An upper chamfering machine body is rotatably mounted between two first side plates. A second arc-shaped slide groove is provided on the first side plate. The center of the circle containing the second arc-shaped slide groove coincides with the rotation point of the upper chamfering machine body on the first side plate. A second slider that cooperates with the second arc-shaped slide groove is provided on the upper chamfering machine body. The upper chamfering machine body rotates along the second arc-shaped slide groove, and the cutter head of the upper chamfering machine body is set downward.

4. The gantry-type CNC gear milling and chamfering machine according to claim 3, characterized in that: The lower chamfering mechanism includes a second chamfering tool holder rotatably mounted on a second tool holder. The second chamfering tool holder includes a second base plate and second side plates vertically mounted on both sides of the second base plate. The second base plate is rotatably mounted on the second tool holder. A third arc-shaped groove is provided on the second base plate. The center of the circle containing the third arc-shaped groove coincides with the rotation point of the second base plate on the second tool holder. A third slider that cooperates with the third arc-shaped groove is provided on the second tool holder. The second base plate rotates along the third arc-shaped groove. A lower chamfering machine body is rotatably mounted between two second side plates. A fourth arc-shaped slide groove is provided on the second side plate. The center of the circle containing the fourth arc-shaped slide groove coincides with the rotation point of the lower chamfering machine body on the second side plate. A fourth slider that cooperates with the fourth arc-shaped slide groove is provided on the lower chamfering machine body. The lower chamfering machine body rotates along the fourth arc-shaped slide groove, and the cutter head of the lower chamfering machine body is set upward.

5. The gantry-type CNC gear milling and chamfering machine according to claim 1 or 2, characterized in that: The first milling mechanism includes a first disc rotatably mounted on a first tool holder, the first disc having a scale, and the first milling machine body fixed to the first disc.

6. The gantry-type CNC gear milling and chamfering machine according to claim 1 or 2, characterized in that: The second milling mechanism includes a second disk rotatably mounted on a second tool holder, the second disk having a scale, and the second milling machine body fixed to the second disk.

7. The gantry-type CNC gear milling and chamfering machine according to claim 1 or 2, characterized in that: The first lateral moving mechanism includes a first lateral slide rail horizontally arranged on the left side of the crossbeam, a first lateral slide plate slidably connected on the first lateral slide rail, a first lateral motor provided at the left end of the crossbeam, a first lateral lead screw fixed on the output shaft of the first lateral motor and arranged parallel to the first lateral slide rail, and a first threaded sleeve threadedly connected to the first lateral lead screw on the first lateral slide plate. The first vertical moving mechanism includes a first vertical rod that moves in the vertical direction, a first vertical slider that is arranged in the vertical direction on the first transverse slide plate, a first vertical slide rail that is slidably connected to the first vertical slider on the first vertical rod, a first vertical motor that is arranged at the top of the first vertical rod, a first vertical lead screw that is fixed on the output shaft of the first vertical motor, and a second threaded sleeve that is threadedly connected to the first vertical lead screw that is fixed on the first transverse slide plate. The first forward and backward moving mechanism includes a first longitudinal slide rail horizontally arranged at the bottom of the first vertical rod, a first longitudinal slide plate slidably connected on the first longitudinal slide rail, a first longitudinal motor provided at one end of the first longitudinal slide plate, a first longitudinal lead screw fixed on the output shaft of the first longitudinal motor and arranged parallel to the first longitudinal slide rail, and a third threaded sleeve threadedly connected to the first longitudinal lead screw fixed at the bottom of the first vertical rod.

8. The gantry-type CNC gear milling and chamfering machine according to claim 1 or 2, characterized in that: The second transverse moving mechanism includes a second transverse slide rail horizontally arranged on the right side of the crossbeam, a second transverse sliding plate slidably connected on the second transverse slide rail, a second transverse motor provided at the right end of the crossbeam, a second transverse lead screw fixed on the output shaft of the second transverse motor and arranged parallel to the second transverse slide rail, and a fourth threaded sleeve threadedly connected to the second transverse lead screw on the second transverse sliding plate. The second vertical moving mechanism includes a second vertical rod that moves in the vertical direction, a second vertical slider that is arranged in the vertical direction on the second transverse slide plate, a second vertical slide rail that is slidably connected to the second vertical slider on the second vertical rod, a second vertical motor that is arranged at the top of the second vertical rod, a second vertical lead screw that is fixed on the output shaft of the second vertical motor, and a fifth threaded sleeve that is threadedly connected to the second vertical lead screw that is fixed on the second transverse slide plate. The second forward and backward moving mechanism includes a second longitudinal slide rail arranged horizontally at the bottom of the second vertical rod, a second longitudinal slide plate slidably connected to the second longitudinal slide rail, a second longitudinal motor provided at one end of the second longitudinal slide plate, a second longitudinal lead screw arranged parallel to the second longitudinal slide rail fixed on the output shaft of the second longitudinal motor, and a sixth threaded sleeve threadedly connected to the second longitudinal lead screw fixed at the bottom of the second vertical rod.

Images