Gantry type numerical control gear edge milling chamfering machine

Abstract

The invention 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 machining efficiency and the machining precision are both high.

Description

Technical Field

[0001] The invention belongs to the technical field of gear processing equipment, and in particular relates to a gantry type CNC gear milling and chamfering machine. Background Art

[0002] Gear milling and chamfering are important steps in the gear processing process. They can remove burrs and sharp corners on the gear edges, effectively reduce quenching cracks, reduce stress concentration, reduce gear meshing noise, and improve gear meshing quality and life.

[0003] With the rapid development of the mechanical equipment manufacturing industry, the market demand for large machinery such as mining machinery, railway machinery, printing machinery, marine gearboxes, especially the slewing bearings of engineering machinery and wind power industry has increased rapidly, and the manufacturing of large gears has also increased accordingly. However, in the process of milling and chamfering large gears, due to structural limitations, the equipment is not suitable for processing larger gears. The traditional large gear ring fixture is mainly a pressure plate type fixture. After placing the large gear ring on the bracket, the gear ring is constantly tapped and adjusted manually. After it is centered, it is pressed and fixed by a pressure plate. The structure of the pressure plate type fixture is relatively simple. Due to the large diameter of the gear shaping support and the slow rotation of the rotary table of the gear shaping machine, the quality of the processed products is greatly affected by the technical level of the workers, and the alignment time is long, which affects production efficiency. In addition, the traditional chamfering is done by hand, which is inefficient and will wear the tooth surface if not paid attention to, and the quality is difficult to guarantee. Therefore, it is necessary to have a super-large gear grinding and chamfering machine to improve the processing capacity of enterprise equipment.

[0004] Patent document 202010363288.4 discloses a gantry-type gear chamfering machine, which sets a column on the gantry and concentrates the chamfering spindle on one column. Although the chamfering machine in the patent document can chamfer the large gear ring at the same time, it has a single function and is more complicated to fix the large gear ring, which affects the overall processing efficiency and accuracy. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a gantry type CNC gear milling and chamfering machine with high processing efficiency and precision.

[0006] The purpose of the present invention is to be solved by the following technical solutions: A gantry type CNC gear milling and chamfering machine, characterized in that: it comprises a base and a gantry body, a rotating worktable is provided on the base, a large gear ring self-centering fixture is provided on the rotating worktable, a first lateral moving mechanism is provided on the left side of the crossbeam of the gantry body, a first vertical moving mechanism is provided on the first lateral moving mechanism, a first front-and-rear moving mechanism is provided on the first vertical moving mechanism, a first rotating table is provided at the bottom of the first front-and-rear moving mechanism, and a first milling and chamfering mechanism is provided at the bottom of the first rotating table; a second lateral moving mechanism is provided on the right side of the crossbeam, a second vertical moving mechanism is provided on the second lateral moving mechanism, a second front-and-rear moving mechanism is provided on the second vertical moving mechanism, a second rotating table is provided at the bottom of the second front-and-rear moving mechanism, and a second milling and chamfering mechanism is provided at the bottom of the second rotating table; The first milling edge chamfering mechanism comprises a first tool holder, one side of the first tool holder is provided with an upper chamfering mechanism capable of adjusting the angle of the tool head; a first milling edge mechanism capable of adjusting the angle of the tool head is provided on a side of the first tool holder opposite to the upper chamfering mechanism; The second milling edge chamfering mechanism comprises a second tool holder, one side of which is provided with a lower chamfering mechanism capable of adjusting the tool head angle; the second tool holder is provided with a second milling edge mechanism capable of adjusting the tool head angle on the side opposite to the lower chamfering mechanism.

[0007] Based on the above structure, after the large gear ring is accurately and automatically clamped by the large gear ring self-centering clamp, the large gear ring can be chamfered at the top and bottom at the same time through the cooperation of the upper chamfering mechanism and the lower chamfering mechanism, and the inner side of the large gear ring can also be symmetrically milled at the same time through the first milling mechanism and the second milling mechanism, thereby improving the processing efficiency and processing accuracy.

[0008] Furthermore, the self-centering fixture for the large gear ring of the present invention comprises a fixture base and a hydraulic chuck fixed at the center of the fixture base, a plurality of claws are evenly arranged along the circumference of the hydraulic chuck, each claw is fixed with a pull rod facing outward, the pull rod is arranged radially along the hydraulic chuck, and the plurality of pull rods are in the same horizontal plane, one end of the pull rod is connected to the claw, and the other end of the pull rod is connected to a clamping block, and the clamping block is slidably arranged on the fixture base; The longitudinal section of the clamp is L-shaped, including a horizontally arranged support plate and a stopper vertically arranged on the outside of the support plate. The stopper is arranged vertically to the support plate, and the L-shaped angle formed by the stopper and the support plate is arranged toward the central axis of the hydraulic chuck. The multiple support plates are all in the same horizontal plane, and the multiple stoppers are at equal distances from the central axis of the hydraulic chuck.

[0009] Preferably, the upper chamfering mechanism of the present invention comprises a first chamfering tool holder rotatably arranged on the first tool holder, and the first chamfering tool holder comprises a first bottom plate and first side plates vertically arranged on both sides of the first bottom plate; The first bottom plate is rotatably arranged on the first tool holder, a first arc-shaped slide groove is provided on the first bottom plate, the center of the circle where the first arc-shaped slide groove is located coincides with the rotation point of the first bottom plate on the first tool holder, a first sliding block matching with the first arc-shaped slide groove is provided on the first tool holder, and the first bottom plate rotates along the first arc-shaped slide groove; An upper chamfering machine body is rotatably arranged between the two first side plates, a second arc-shaped slide groove is opened on the first side plate, the center of the circle where the second arc-shaped slide groove is located coincides with the rotation point of the upper chamfering machine body on the first side plate, and a second sliding block cooperating with the second arc-shaped slide groove is arranged on the upper chamfering machine body. The upper chamfering machine body rotates along the second arc-shaped slide groove, and the tool head of the upper chamfering machine body is arranged downward.

[0010] Furthermore, the lower chamfering mechanism of the present invention comprises a second chamfering tool holder rotatably disposed on the second tool holder, and the second chamfering tool holder comprises a second bottom plate and second side plates vertically disposed on both sides of the second bottom plate; The second bottom plate is rotatably arranged on the second tool holder, a third arc-shaped sliding groove is provided on the second bottom plate, the center of the circle where the third arc-shaped sliding groove is located coincides with the rotation point of the second bottom plate on the second tool holder, a third sliding block is provided on the second tool holder to cooperate with the third arc-shaped sliding groove, and the second bottom plate rotates along the third arc-shaped sliding groove; A lower chamfering machine body is rotatably arranged between the two second side plates, a fourth arc-shaped slide groove is provided on the second side plate, the center of the circle where the fourth arc-shaped slide groove is located coincides with the rotation point of the lower chamfering machine body on the second side plate, and a fourth sliding block cooperating 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 arranged upward.

[0011] Preferably, the first milling mechanism of the present invention comprises a first disc rotatably disposed on a first tool holder, the first disc is provided with a scale, and the first disc is fixed with a first milling machine body.

[0012] Preferably, the second milling mechanism of the present invention comprises a second disc rotatably disposed on the second tool holder, the second disc is provided with a scale, and the second milling machine body is fixed to the second disc.

[0013] Preferably, the first transverse moving mechanism of the present invention comprises a first transverse slide rail horizontally arranged on the left side of the crossbeam, a first transverse slide plate is slidably connected to the first transverse slide rail, a first transverse motor is arranged at the left end of the crossbeam, a first transverse screw rod arranged parallel to the first transverse slide rail is fixed on the output shaft of the first transverse motor, and a first screw sleeve threadedly connected to the first transverse screw rod is arranged on the first transverse slide plate; The first vertical moving mechanism comprises a first vertical rod moving in a vertical direction, a first vertical slider arranged in a vertical direction is provided on the first horizontal slide plate, a first vertical slide rail slidably connected to the first vertical slider is provided on the first vertical rod, a first vertical motor is provided on the top of the first vertical rod, a first vertical screw is fixed on the output shaft of the first vertical motor, and a second screw sleeve threadedly connected to the first vertical screw is fixed on the first horizontal slide plate; The first forward and backward moving mechanism includes a first longitudinal slide rail longitudinally and horizontally arranged at the bottom of the first vertical rod, a first longitudinal slide plate is slidably connected to the first longitudinal slide rail, a first longitudinal motor is provided at one end of the first longitudinal slide plate, a first longitudinal screw rod parallel to the first longitudinal slide rail is fixed on the output shaft of the first longitudinal motor, and a third screw sleeve threadedly connected to the first longitudinal screw rod is fixed at the bottom of the first vertical rod.

[0014] Preferably, the second transverse moving mechanism of the present invention comprises a second transverse slide rail horizontally arranged on the right side of the crossbeam, a second transverse slide plate is slidably connected to the second transverse slide rail, a second transverse motor is arranged at the right end of the crossbeam, a second transverse screw rod arranged parallel to the second transverse slide rail is fixed on the output shaft of the second transverse motor, and a fourth screw sleeve threadedly connected to the second transverse screw rod is arranged on the second transverse slide plate; The second vertical moving mechanism includes a second vertical rod moving in a vertical direction, a second vertical slider arranged in a vertical direction is provided on the second horizontal slide plate, a second vertical slide rail slidably connected to the second vertical slider is provided on the second vertical rod, a second vertical motor is provided on the top of the second vertical rod, a second vertical screw is fixed on the output shaft of the second vertical motor, and a fifth screw sleeve threadedly connected to the second vertical screw is fixed on the second horizontal 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 is slidably connected to the second longitudinal slide rail, a second longitudinal motor is provided at one end of the second longitudinal slide plate, a second longitudinal screw rod arranged parallel to the second longitudinal slide rail is fixed on the output shaft of the second longitudinal motor, and a sixth screw sleeve threadedly connected to the second longitudinal screw rod is fixed at the bottom of the second vertical rod.

[0015] Compared with the prior art, the present invention has the following characteristics and beneficial effects: 1. After the large gear ring is accurately and automatically clamped by the large gear ring self-centering fixture, the upper and lower chamfering mechanisms are coordinated to simultaneously chamfer the large gear ring, and the first milling mechanism and the second milling mechanism are also used to simultaneously symmetrically mill the inner side of the large gear ring, thereby improving the processing efficiency and processing accuracy.

[0016] 2. After placing the large gear ring on the pallet, the hydraulic chuck pulls the claws at the same time, and the claws drive the clamping blocks to lock synchronously through the pull rod. Multiple clamping blocks simultaneously pull the large gear ring toward the center axis of the hydraulic chuck, which can achieve accurate and rapid self-centering clamping of the large gear ring, thereby improving processing accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 .

[0018] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 .

[0019] Figure 3 It is a schematic diagram of the structure of the large gear ring self-centering fixture of the present invention.

[0020] Figure 4 It is a schematic diagram of the structure of the first milling and chamfering mechanism of the present invention.

[0021] Figure 5 It is a schematic diagram of the structure of the second milling and chamfering mechanism of the present invention.

[0022] In the figure: base 1, gantry body 2, rotating worktable 3, large gear ring self-centering fixture 4, first lateral moving mechanism 5, first vertical moving mechanism 6, first front-back moving mechanism 7, first rotating table 8, second lateral moving mechanism 9, second vertical moving mechanism 10, second front-back moving mechanism 11, second rotating table 12, first tool holder 13, upper chamfering mechanism 14, first milling edge mechanism 15, second tool holder 16, lower chamfering mechanism 17, second milling edge mechanism 18, fixture base 19, hydraulic chuck 20, claw 21, pull rod 22, clamping block 23, support plate 24, stopper 25, first lateral slide rail 26, first lateral slide plate 27, first lateral motor 28, first lateral screw rod 29, first vertical rod 30, first vertical slider 31, first vertical slide rail 32, first vertical screw rod 33, first longitudinal slide rail 3 4. A first longitudinal slide 35, a first longitudinal motor 36, a first longitudinal screw rod 37, a second transverse slide rail 38, a second transverse slide 39, a second transverse motor 40, a second transverse screw rod 41, a second vertical rod 42, a second vertical slider 43, a second vertical slide rail 44, a second vertical motor 45, a second vertical screw rod 46, a second longitudinal slide rail 47, a second longitudinal slide 48, a second longitudinal motor 49, a second longitudinal screw rod 50, a first bottom plate 51, a first side plate 52, an arc-shaped slide groove 53, an upper chamfering machine body 54, a second arc-shaped slide groove 55, a second bottom plate 56, a second side plate 57, a third arc-shaped slide groove 58, a lower chamfering machine body 59, a fourth arc-shaped slide groove 60, a first disc 61, a first milling machine body 62, a second disc 63, a second milling machine body 64, and a first vertical motor 65. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings.

[0024] A gantry type CNC gear milling and chamfering machine comprises a base 1 and a gantry body 2, wherein a rotating worktable 3 is provided on the base 1, a large gear ring self-centering fixture 4 is provided on the rotating worktable 3, a first lateral moving mechanism 5 is provided on the left side of the crossbeam of the gantry body 2, a first vertical moving mechanism 6 is provided on the first lateral moving mechanism 5, a first front-and-rear moving mechanism 7 is provided on the first vertical moving mechanism 6, a first rotating table 8 is provided at the bottom of the first front-and-rear moving mechanism 7, a first milling and chamfering mechanism is provided at the bottom of the first rotating table 8; a second lateral moving mechanism 9 is provided on the right side of the crossbeam, a second vertical moving mechanism 10 is provided on the second lateral moving mechanism 9, a second front-and-rear moving mechanism 11 is provided on the second vertical moving mechanism 10, a second rotating table 12 is provided at the bottom of the second front-and-rear moving mechanism 11, a second milling and chamfering mechanism is provided at the bottom of the second rotating table 12.

[0025] The first milling edge chamfering mechanism comprises a first tool holder 13 , one side of which is provided with an upper chamfering mechanism 14 capable of adjusting the tool head angle; the side of the first tool holder 13 opposite to the upper chamfering mechanism 14 is provided with a first milling edge mechanism 15 capable of adjusting the tool head angle.

[0026] The second milling and chamfering mechanism comprises a second tool holder 16 , one side of which is provided with a lower chamfering mechanism 17 with an adjustable tool head angle; the second tool holder 16 is provided with a second milling mechanism 18 with an adjustable tool head angle on a side opposite to the lower chamfering mechanism 17 .

[0027] Based on the above structure, after the large gear ring is accurately and automatically clamped by the large gear ring self-centering clamp 4, the large gear ring is chamfered at the top and bottom at the same time through the cooperation of the upper chamfering mechanism 14 and the lower chamfering mechanism 17, and the inner side of the large gear ring can also be symmetrically milled at the same time through the first milling mechanism 15 and the second milling mechanism 18, thereby improving the processing efficiency and processing accuracy.

[0028] Among them, the large gear ring self-centering fixture 4 includes a fixture base 19 and a hydraulic chuck 20 fixed at the center of the fixture base 19, a plurality of claws 21 are evenly arranged along the circumference of the hydraulic chuck 20, each claw 21 is fixed with a pull rod 22 facing outward, the pull rod 22 is radially arranged along the hydraulic chuck 20, and multiple pull rods 22 are in the same horizontal plane, one end of the pull rod 22 is connected to the claw 21, and the other end of the pull rod 22 is connected to a clamping block 23, and the clamping block 23 is slidably arranged on the fixture base 19; the longitudinal section of the clamping block 23 is L-shaped, including a horizontally arranged support plate 24 and a stopper 25 vertically arranged on the outside of the support plate 24, the stopper 25 is vertically arranged with the support plate 24, and the L-shaped angle formed by the stopper 25 and the support plate 24 is arranged toward the central axis direction of the hydraulic chuck 20, multiple support plates 24 are in the same horizontal plane, and multiple stoppers 25 are at equal distances from the central axis of the hydraulic chuck 20.

[0029] After placing the large gear ring on the support plate 24, the hydraulic chuck 20 pulls the claw 21 at the same time, and the claw 21 drives the clamping block 23 to lock synchronously through the pull rod 22. Multiple clamping blocks 23 simultaneously pull the large gear ring toward the central axis direction of the hydraulic chuck 20, which can achieve accurate and rapid self-centering clamping of the large gear ring.

[0030] The first transverse moving mechanism 5 includes a first transverse rail 26 horizontally arranged on the left side of the crossbeam, a first transverse slide plate 27 is slidably connected to the first transverse rail 26, a first transverse motor 28 is arranged at the left end of the crossbeam, a first transverse screw rod 29 arranged parallel to the first transverse rail 26 is fixed on the output shaft of the first transverse motor 28, and a first screw sleeve threadedly connected to the first transverse screw rod 29 is arranged on the first transverse slide plate 27; the first transverse motor 28 rotates to drive the first transverse screw rod 29 to rotate, and the first transverse slide plate 27 moves on the first transverse screw rod 29 driven by the first screw sleeve, and the first transverse slide plate 27 moves along the first transverse rail 26 at the same time. The first transverse slide plate 27 drives the first vertical moving mechanism 6 to move left and right.

[0031] The first vertical moving mechanism 6 includes a first vertical rod 30 that moves in the vertical direction, a first vertical slider 31 that is arranged in the vertical direction on the first horizontal slide 27, a first vertical slide rail 32 that is slidably connected to the first vertical slider 31 is arranged on the first vertical rod 30, a first vertical motor 65 is arranged on the top of the first vertical rod 30, a first vertical lead screw 33 is fixed on the output shaft of the first vertical motor 65, and a second screw sleeve that is threadedly connected to the first vertical lead screw 33 is fixed on the first horizontal slide 27. The first vertical motor 65 rotates to drive the first vertical lead screw 33 to rotate, and the first vertical lead screw 33 moves up and down on the second screw sleeve, and at the same time drives the first vertical rod 30 to move up and down on the first vertical slide rail 32 with the cooperation of the first vertical slider 31. The first vertical rod 30 drives the first front-back moving mechanism 7 to move up and down.

[0032] The first forward and backward moving mechanism 7 includes a first longitudinal slide rail 34 arranged horizontally 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 arranged at one end of the first longitudinal slide plate 35, a first longitudinal screw rod 37 arranged parallel to the first longitudinal slide rail 34 is fixed on the output shaft of the first longitudinal motor 36, and a third screw sleeve threadedly connected to the first longitudinal screw rod 37 is fixed at the bottom of the first vertical rod 30. The first longitudinal motor 36 rotates to drive the first longitudinal screw rod 37 to rotate, and the first longitudinal screw rod 37 moves forward and backward on the third screw sleeve, and at the same time drives the first longitudinal slide plate 35 to move forward and backward along the first longitudinal slide rail 34. The first longitudinal slide plate 35 drives the first rotating table 8 and the first milling and chamfering mechanism arranged at the bottom thereof to move to the specified position.

[0033] The second transverse moving mechanism 9 includes a second transverse rail 38 horizontally arranged on the right side of the crossbeam, a second transverse slide plate 39 is slidably connected to the second transverse rail 38, a second transverse motor 40 is arranged at the right end of the crossbeam, a second transverse screw rod 41 arranged parallel to the second transverse rail 38 is fixed on the output shaft of the second transverse motor 40, and a fourth screw sleeve threadedly connected to the second transverse screw rod 41 is arranged on the second transverse slide plate 38. The second transverse motor 40 rotates to drive the second transverse screw rod 41 to rotate, and the second transverse slide plate 39 moves on the second transverse screw rod 41 driven by the fourth screw sleeve, and the second transverse slide plate 39 moves along the second transverse rail 38 at the same time. The second transverse slide plate 39 drives the second vertical moving mechanism 10 to move left and right.

[0034] The second vertical moving mechanism 10 includes a second vertical rod 42 that moves in the vertical direction, a second vertical slider 43 that is arranged in the vertical direction on the second horizontal slide 39, a second vertical slide rail 44 that is slidably connected to the second vertical slider 43 is arranged on the second vertical rod 42, a second vertical motor 45 is arranged on the top of the second vertical rod 42, a second vertical lead screw 46 is fixed on the output shaft of the second vertical motor 45, and a fifth screw sleeve that is threadedly connected to the second vertical lead screw 46 is fixed on the second horizontal slide 39. The second vertical motor 45 rotates to drive the second vertical lead screw 46 to rotate, and the second vertical lead screw 46 moves up and down on the fifth screw sleeve, and at the same time drives 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 drives the second front-back moving mechanism 11 to move up and down.

[0035] The second forward and backward moving mechanism 11 includes a second longitudinal slide rail 47 arranged horizontally 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 arranged at one end of the second longitudinal slide plate 48, a second longitudinal screw rod 50 arranged parallel to the second longitudinal slide rail 47 is fixed on the output shaft of the second longitudinal motor 49, and a sixth screw sleeve threadedly connected to the second longitudinal screw rod 50 is fixed at the bottom of the second vertical rod 42. The second longitudinal motor 49 rotates to drive the second longitudinal screw rod 50 to rotate, and the second longitudinal screw rod 50 moves forward and backward on the sixth screw sleeve, and at the same time drives the second longitudinal slide plate 48 to move forward and backward along the second longitudinal slide rail 47. The second longitudinal slide plate 48 drives the second rotating table 12 and the second milling and chamfering mechanism arranged at the bottom thereof to move to the specified position.

[0036] The upper chamfering mechanism 14 includes a first chamfering tool holder rotatably disposed on the first tool holder 13, and the first chamfering tool holder includes a first bottom plate 51 and first side plates 52 vertically disposed on both sides of the first bottom plate 51. The first bottom plate 51 is rotatably disposed on the first tool holder 13, and a first arc-shaped slide groove 53 is provided on the first bottom plate 51. The center of the circle where the first arc-shaped slide groove 53 is located coincides with the rotation point of the first bottom plate 51 on the first tool holder 13. The first tool holder 13 is provided with a first sliding block that cooperates with the first arc-shaped slide groove 53, and the first bottom plate 51 rotates along the first arc-shaped slide groove 53. An upper chamfering machine body 54 is rotatably disposed between the two first side plates 52, a second arc-shaped slide groove 55 is provided on the first side plate 52, the center of the circle where the second arc-shaped slide groove 55 is located coincides with the rotation point of the upper chamfering machine body 54 on the first side plate 52, a second slider matched with the second arc-shaped slide groove 55 is provided on the upper chamfering machine body 54, the upper chamfering machine body 54 rotates along the second arc-shaped slide groove 55, and the cutter head of the upper chamfering machine body 54 is arranged downward. The rotation of the first bottom plate 51 drives the upper chamfering machine body 54 to rotate to a desired angle in the horizontal direction, and the upper chamfering machine body 54 is adjusted to a desired angle in the vertical direction on the first side plate 52.

[0037] The lower chamfering mechanism 17 includes a second chamfering tool holder rotatably disposed on the second tool holder 16, and the second chamfering tool holder includes a second bottom plate 56 and second side plates 57 vertically disposed on both sides of the second bottom plate 56. The second bottom plate 56 is rotatably disposed on the second tool holder 16, and a third arc-shaped slide groove 58 is provided on the second bottom plate 56. The center of the circle where the third arc-shaped slide groove 58 is located coincides with the rotation point of the second bottom plate 56 on the second tool holder 16. The second tool holder 56 is provided with a third slider matched with the third arc-shaped slide groove 58, and the second bottom plate 56 rotates along the third arc-shaped slide groove 58. A lower chamfering machine body 59 is rotatably disposed between the two second side plates 57, a fourth arc-shaped slide groove 60 is provided on the second side plate 57, the center of the circle where the fourth arc-shaped slide groove 60 is located coincides with the rotation point of the lower chamfering machine body 59 on the second side plate 57, a fourth slider matched with the fourth arc-shaped slide groove 60 is provided on the lower chamfering machine body 59, the lower chamfering machine body 59 rotates along the fourth arc-shaped slide groove 60, and the cutter head of the lower chamfering machine body 59 is arranged upward. The rotation of the second bottom plate 56 drives the lower chamfering machine body 59 to rotate to a desired angle in the horizontal direction, and the lower chamfering machine body 59 is adjusted to a desired angle in the vertical direction on the second side plate 57.

[0038] The first milling mechanism 15 includes a first disc 61 rotatably arranged on the first tool holder 13, the first disc 61 is provided with a scale, and the first disc 61 is fixed with a first milling machine body 62. The angle of the first milling machine body 62 can be accurately adjusted according to the inclination of the teeth of the processed gear through the first disc 61.

[0039] The second milling mechanism 18 includes a second disc 63 rotatably disposed on the second tool holder 16, a scale is provided on the second disc 63, and a second milling machine body 64 is fixed to the second disc 63. The angle of the second milling machine body 64 can be accurately adjusted according to the inclination of the teeth of the processed gear through the second disc 63.

[0040] The working process of this equipment is: After placing the large gear ring on the support plate 24, the hydraulic chuck 20 pulls the claw 21 at the same time, and the claw 21 drives the clamping block 23 to lock synchronously through the pull rod 22. Multiple clamping blocks 23 simultaneously pull the large gear ring toward the central axis of the hydraulic chuck 20, which can achieve accurate and rapid self-centering clamping of the large gear ring.

[0041] When the large gear ring is chamfered up and down, the first lateral moving mechanism 5, the first vertical moving mechanism 6, the first front-to-back moving mechanism 7 and the first rotating platform 8 each move according to the instructions, move the upper chamfering mechanism 14 to the specified position, the rotation of the first bottom plate 51 drives the upper chamfering machine body 54 to rotate to the required angle in the horizontal direction, and the upper chamfering machine body 54 is adjusted to the required angle in the vertical direction on the first side plate 52. At this time, the upper chamfering machine body 54 is above the large gear ring, and the cutter head of the upper chamfering machine body 54 is aligned with the position to be processed. The second lateral moving mechanism 9, the second vertical moving mechanism 10, the second front-to-back moving mechanism 11 and the second rotating platform 12 each move according to the instructions, move the lower chamfering mechanism 14 to the specified position, the rotation of the second bottom plate 56 drives the lower chamfering machine body 59 to rotate to the required angle in the horizontal direction, and the lower chamfering machine body 59 is adjusted to the required angle in the vertical direction on the second side plate 57. At this time, the lower chamfering machine body 59 is below the large gear ring, and the cutter head of the lower chamfering machine body 59 is aligned with the position to be processed. In cooperation with the rotating worktable arranged at the bottom of the large gear ring self-centering fixture 4, 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, which effectively improves the stability and processing accuracy of the large gear ring when chamfering.

[0042] When the inner teeth of the large gear ring are milled, the first transverse moving mechanism 5, the first vertical moving mechanism 6, the first front-to-back moving mechanism 7 and the first rotating platform 8 are moved according to the instructions, and the first milling mechanism 45 is moved to the specified position. The angle of the first milling machine body 62 can be accurately adjusted according to the inclination of the teeth of the processed gear through the first disc 61. At this time, the first milling mechanism 15 is aligned with the teeth on the left side of the inside of the large gear ring. The second transverse moving mechanism 9, the second vertical moving mechanism 10, the second front-to-back moving mechanism 11 and the second rotating platform 12 are moved according to the instructions, and the second milling mechanism 18 is moved to the specified position. The angle of the second milling machine body 64 can be accurately adjusted according to the inclination of the teeth of the processed gear through the second disc 63. At this time, the second milling mechanism 18 is aligned with the teeth on the right side of the inside of the large gear ring. The first milling mechanism 15 and the second milling mechanism 18 mill the inside of the large gear ring symmetrically at the same time. The processing efficiency is high, and at the same time, the stability of the large gear ring during chamfering is effectively improved, thereby improving its processing accuracy.

[0043] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A gantry type CNC gear milling and chamfering machine, characterized in that: It comprises a base and a gantry body, a rotating worktable is provided on the base, a large gear ring self-centering fixture is provided on the rotating worktable, a first lateral moving mechanism is provided on the left side of the crossbeam of the gantry body, a first vertical moving mechanism is provided on the first lateral moving mechanism, a first front-back moving mechanism is provided on the first vertical moving mechanism, a first rotating table is provided at the bottom of the first front-back moving mechanism, and a first milling and chamfering mechanism is provided at the bottom of the first rotating table; a second lateral moving mechanism is provided on the right side of the crossbeam, a second vertical moving mechanism is provided on the second lateral moving mechanism, a second front-back moving mechanism is provided on the second vertical moving mechanism, a second rotating table is provided at the bottom of the second front-back moving mechanism, and a second milling and chamfering mechanism is provided at the bottom of the second rotating table; The first milling edge chamfering mechanism comprises a first tool holder, one side of the first tool holder is provided with an upper chamfering mechanism capable of adjusting the angle of the tool head; a first milling edge mechanism capable of adjusting the angle of the tool head is provided on a side of the first tool holder opposite to the upper chamfering mechanism; The second milling edge chamfering mechanism comprises a second tool holder, one side of which is provided with a lower chamfering mechanism capable of adjusting the tool head angle; the second tool holder is provided with a second milling edge mechanism capable of adjusting the tool head angle on the side 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 ring self-centering fixture comprises a fixture base and a hydraulic chuck fixed at the center of the fixture base, a plurality of claws are evenly arranged along the circumference of the hydraulic chuck, each claw is fixed with a pull rod facing outward, the pull rod is arranged radially along the hydraulic chuck, and the plurality of pull rods are in the same horizontal plane, one end of the pull rod is connected to the claw, and the other end of the pull rod is connected to a clamping block, and the clamping block is slidably arranged on the fixture base; The longitudinal section of the clamp is L-shaped, including a horizontally arranged support plate and a stopper vertically arranged on the outside of the support plate. The stopper is arranged vertically to the support plate, and the L-shaped angle formed by the stopper and the support plate is arranged toward the central axis of the hydraulic chuck. The multiple support plates are all in the same horizontal plane, and the multiple stoppers are at equal distances 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 comprises a first chamfering tool holder rotatably arranged on the first tool holder, and the first chamfering tool holder comprises a first bottom plate and first side plates vertically arranged on both sides of the first bottom plate; The first bottom plate is rotatably arranged on the first tool holder, a first arc-shaped slide groove is provided on the first bottom plate, the center of the circle where the first arc-shaped slide groove is located coincides with the rotation point of the first bottom plate on the first tool holder, a first sliding block matching with the first arc-shaped slide groove is provided on the first tool holder, and the first bottom plate rotates along the first arc-shaped slide groove; An upper chamfering machine body is rotatably arranged between the two first side plates, a second arc-shaped slide groove is opened on the first side plate, the center of the circle where the second arc-shaped slide groove is located coincides with the rotation point of the upper chamfering machine body on the first side plate, and a second sliding block cooperating with the second arc-shaped slide groove is arranged on the upper chamfering machine body. The upper chamfering machine body rotates along the second arc-shaped slide groove, and the tool head of the upper chamfering machine body is arranged downward.

4. The gantry type CNC gear milling and chamfering machine according to claim 3, characterized in that: The lower chamfering mechanism comprises a second chamfering tool holder rotatably arranged on the second tool holder, and the second chamfering tool holder comprises a second bottom plate and second side plates vertically arranged on both sides of the second bottom plate; The second bottom plate is rotatably arranged on the second tool holder, a third arc-shaped sliding groove is provided on the second bottom plate, the center of the circle where the third arc-shaped sliding groove is located coincides with the rotation point of the second bottom plate on the second tool holder, a third sliding block is provided on the second tool holder to cooperate with the third arc-shaped sliding groove, and the second bottom plate rotates along the third arc-shaped sliding groove; A lower chamfering machine body is rotatably arranged between the two second side plates, a fourth arc-shaped slide groove is provided on the second side plate, the center of the circle where the fourth arc-shaped slide groove is located coincides with the rotation point of the lower chamfering machine body on the second side plate, and a fourth sliding block cooperating 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 arranged upward.

5. The gantry type CNC gear milling and chamfering machine according to claim 1 or 2, characterized in that: The first milling mechanism comprises a first disc rotatably arranged on the first tool holder, the first disc is provided with a scale, and the first milling machine body is 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 edge milling mechanism comprises a second disc rotatably arranged on the second tool holder, the second disc is provided with a scale, and the second edge milling machine body is fixed to the second disc.

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

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