Cutting device for gear machining and cutting process thereof

Abstract

The invention relates to the technical field of gear hobbing machines, in particular to a cutting device for gear machining and a cutting technology.The cutting device comprises a cutter head, a penetrating cutter shaft is fixed to the middle of the cutter head, two opposite cutter assemblies are arranged on the outer edge of the cutter head, and the two cutter assemblies are rotationally distributed in a staggered mode; one side of the cutter shaft is connected with the two cutter assemblies by arranging a cutter changing plate, one end of the cutter changing plate is in transmission connection with a stroke mechanism, and the cutter shaft is in transmission connection with the stroke mechanism by fixedly sleeving a ring gear. After the cutterhead and the cutter shaft rotate by the specified number of turns, the cutters on the cutter assemblies are overheated, the stroke mechanism works to drive the cutter replacing plate, then the rest cutter assemblies work alternately, and the problem that the cutters are overheated due to long-time machining is solved through alternate work of the two cutter assemblies.

Description

Technical Field

[0001] The invention relates to the technical field of gear hobbing machines, and in particular to a cutting device and a cutting process thereof for gear machining. Background Art

[0002] Gear hobbing machines are the most widely used type of gear processing machine tools. Gear hobbing machines can cut spur and helical cylindrical gears, as well as worm wheels and sprockets. Gear processing machines that use hobs to process spur, helical and herringbone cylindrical gears and worm wheels according to the development method can also process workpieces with various special tooth shapes such as splines and sprockets when using special hobs. The gear hobbing tool on the gear hobbing machine contacts the workpiece during rapid rotation and cuts the workpiece. In traditional technology, the cutting fluid is sprayed to cool the workpiece. The cutting fluid will pollute the machine tool. A large amount of cutting fluid needs to be put into use during processing, resulting in a waste of resources. If the tool continues to work after overheating, it will be damaged. Therefore, an automatic replacement method can be used to avoid overheating. Based on the research and development purpose of automatic replacement of gear hobbing tools during cutting, the present invention provides a cutting device for gear processing and a cutting process thereof. Summary of the invention

[0003] The object of the present invention is to provide a cutting device for gear machining and a cutting process thereof, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cutting device for gear processing, comprising a cutter disc, a through-cutting cutter shaft is fixed in the middle of the cutter disc, two relative cutter assemblies are arranged at the outer edge of the cutter disc, and the two cutter assemblies are rotated and staggered with each other, one side of the cutter shaft is connected with the two cutter assemblies by setting a cutter changing plate, and one end of the cutter changing plate is connected to a travel mechanism in a transmission manner, a supporting reinforcement seat is distributed at one end of the cutter shaft, the travel mechanism is installed on the reinforcement seat, and the cutter shaft is connected to the travel mechanism in a transmission manner through a fixed sleeve with a ring gear, the cutter assembly comprises a ring frame, and a plurality of evenly arranged cutter units connected to one side of the ring frame, the ring frame is vertically fixed to the cutter changing plate by setting a support plate, and the cutter changing plate is distributed in a plate groove opened on the cutter shaft.

[0005] A plurality of grooves are evenly arranged at the outer edge of the cutter disc, and the tool unit includes a cutting knife arranged in the groove of the cutter disc, a unit frame arranged on one side of the cutting knife, a guide square tube arranged on the other side of the cutting knife, a pad sliding through a plate hole opened on the unit frame, and a pull-back spring sheet fixed on the guide square tube. The cutting knife slides through the inner hole of the guide square tube by setting a pillar, and the pillar and the pull-back spring sheet are connected. The guide square tube and the unit frame are respectively fixed on the bottom surfaces of both sides of the cutter disc, one end of the pad is provided with a bevel, and the other end is fixedly connected to the ring frame, and the bevel end on the pad is inserted into the plate groove opened on the cutting knife to make the cutting knife extend out of the cutter disc.

[0006] The stroke mechanism includes a first control frame and a second control frame fixed on a reinforcement seat, a tail assembly supported on the second control frame, a head assembly supported on the first control frame, and a control ring plate transmission-connected to one end of the tail assembly, the ring gear is transmission-connected to the head assembly, one end of the tool changing plate is clamped with the inner edge of the control ring plate by setting an I-shaped roller, and the other end of the tail assembly is transmission-connected to the head assembly.

[0007] The head assembly includes a fixed-speed gear meshing with the ring gear, a fixed-speed worm fixed in the middle of the fixed-speed gear, a speed change group connected to the tail assembly, and a fixed-speed disk group for establishing transmission between the speed change group and the fixed-speed worm, and the fixed-speed worm is movably sleeved in a through hole opened on the first control frame.

[0008] The constant speed disc group includes a supporting gear meshingly connected to the constant speed worm, a first middle shaft fixed in the middle of the supporting gear, a constant speed disc distributed on one side of the supporting gear, a plurality of direction sliding columns arranged around the constant speed disc, and a spring sleeved on the direction sliding column, the direction sliding column slides through a through hole opened on the edge of the supporting gear, the spring is supported between the constant speed disc and the supporting gear, and the first middle shaft is movably sleeved in the through hole opened on the first control frame.

[0009] The speed change group includes an L-shaped adjustment plate with one end sliding through a square hole opened on the first control frame, a threaded column and a speed change shaft supported on the L-shaped adjustment plate, and a rubber disk fixed at one end of the speed change shaft. The speed change shaft and the threaded column are respectively movably sleeved on two holes opened on the L-shaped adjustment plate, and the threaded column passes through the internal threaded hole opened on the first control frame. The outer edge of the rubber disk is in contact with the bottom surface of the fixed speed disk for transmission.

[0010] The tail assembly includes a speed reduction gear, a speed reduction worm, a spring group, a horizontal worm and a crank group. One end of the crank group is connected to the control ring plate, and the horizontal worm is transmission-connected between the crank group and the spring group. One side of the spring group is transmission-connected with the speed reduction gear. One end of the speed reduction worm is meshingly connected with the long cylinder gear fixed on the speed change shaft through a fixed gear, and the spiral teeth on the speed reduction worm are meshingly connected with the speed reduction gear. The horizontal worm is movably sleeved in a through hole opened on the second control frame.

[0011] The spring group includes a low-speed shaft vertically fixed in the middle of the speed reduction gear, a spring with a fixed sleeve on the low-speed shaft, an outer gear ring of the fixed sleeve outside the spring, a restraining frame fixed on the bottom surface of one side of the outer gear ring, and a stopping spring fixed on the second control frame. The low-speed shaft is movably sleeved in a through hole opened in the middle of the restraining frame, and one end of the stopping spring alternately engages with the two end protrusions on the rotating restraining frame. The low-speed shaft is also movably sleeved in the through hole opened in the second control frame, and one end of the transverse worm is connected to the outer gear ring through a meshing transmission connection with the fixed shaft gear.

[0012] The crank group includes a second central shaft, a crank plate, a connecting rod and an L-shaped push-pull plate. The second central shaft is movably sleeved in a through hole opened on the second control frame. One end of the second central shaft is fixed to the middle of the crank plate. The second central shaft is connected by a helical tooth meshing transmission connection on a fixed cylinder gear and a transverse worm. One end of the connecting rod is hinged to the crank plate, and the other end is hinged to one end of the L-shaped push-pull plate. The other end of the L-shaped push-pull plate is fixedly connected to the control ring plate. The L-shaped push-pull plate slides through the plate hole opened on the second control frame.

[0013] A cutting process for gear machining comprises the following steps:

[0014] Step 1: Fix the workpiece to be processed on the workpiece table of the gear hobbing machine. The workpiece table drives the workpiece close to the rotating cutting device. The cutter head drives one tool assembly to rotate to cut the workpiece, and the other relative tool assembly is in a resting and cooling state.

[0015] Step 2: After the tool shaft rotates a specified number of times, the travel mechanism drives the tool changer to move in one direction, controlling the deformation and shrinkage of the tool assembly that was originally cutting, and the deformed and shrunk tool assembly is separated from the workpiece;

[0016] Step 3: At the same time, the unidirectionally moving tool changer will also drive the resting and cooling tool assembly to deform and expand, and the expanded tool assembly will contact the cutting workpiece;

[0017] Step 4: Every time the cutter shaft rotates a specified number of times, the cutting device automatically completes the tool replacement work until the workpiece is cut into a gear product.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention drives a single tool integration to rotate to contact the cutting workpiece through the tool disc, while the other tool integration is in a resting and cooling state. After the tool disc and the tool shaft rotate a specified number of times, the cutting tool on the cutting tool integration is overheated, and the stroke mechanism works to drive the tool changing plate, and then the resting tool integration replaces the work. The problem of long-term overheating of the cutting tool is solved by taking turns to replace the two tool integrations.

[0020] 2. The present invention collects and converts the power of the knife shaft rotation through the stroke mechanism, specifically collects power through the mainspring. After the power is saturated, the mainspring drives the outer gear ring to rotate half a circle. The subsequent transmission controls the axial movement of the control ring plate, and the control ring plate drives the orbiting tool changing plate to translate, controlling the cutting tool integration to shrink and rest, and at the same time controlling the resting tool integration to expand and then start cutting work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention.

[0022] Figure 2 Schematic diagram of tool integration structure.

[0023] Figure 3 This is a schematic diagram of the tool change plate position.

[0024] Figure 4 This is a schematic diagram of the ring frame structure.

[0025] Figure 5 Schematic diagram of the tool unit structure.

[0026] Figure 6 Schematic diagram of the cutter disc structure.

[0027] Figure 7 It is a schematic diagram of the travel mechanism structure.

[0028] Figure 8 This is a schematic diagram of the head assembly structure.

[0029] Fig. 9 It is a schematic diagram of the structure of the constant speed disc group.

[0030] Fig.10 This is a schematic diagram of the tail assembly structure.

[0031] Fig.11 Schematic diagram of the speed reduction worm position.

[0032] Fig.12 This is a schematic diagram of the structure of the clockwork group.

[0033] Fig.13 Schematic diagram of the crank group structure.

[0034] Fig.14 Schematic diagram of the position of the fixed speed worm.

[0035] In the figure: cutter disc 1, cutter shaft 2, cutter assembly 3, cutter plate 4, travel mechanism 5, reinforcement seat 6, ring gear 7, ring frame 8, cutter unit 9, pull-back spring 10, guide square tube 11, cutting knife 12, pad 13, unit frame 14, tail assembly 15, first control frame 16, head assembly 17, second control frame 18, control ring plate 19, I-shaped roller 20, fixed speed disc assembly 21, fixed speed worm 22, fixed speed gear 23, speed change assembly 2 4. Fixed speed plate 25, spring 26, support gear 27, steering column 28, first middle shaft 29, rubber plate 30, speed change shaft 31, threaded column 32, L-shaped adjustment plate 33, speed reduction gear 34, speed reduction worm 35, spring group 36, horizontal worm 37, crank group 38, spring 39, restraining frame 40, low speed shaft 41, outer ring gear 42, stop spring 43, second middle shaft 44, crank plate 45, connecting rod 46, L-shaped push-pull plate 47. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the technical solutions in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figures 1 to 14 The present invention provides a technical solution: a cutting device for gear processing, comprising a cutter disc 1, a through cutter shaft 2 is fixed in the middle of the cutter disc 1, two opposite cutter assemblies 3 are arranged at the outer edge of the cutter disc 1, and the two cutter assemblies 3 are rotated and staggered with each other, one side of the cutter shaft 2 is connected with the two cutter assemblies 3 by setting a cutter changing plate 4, and one end of the cutter changing plate 4 is connected with a travel mechanism 5 in a transmission connection, one end of the cutter shaft 2 is distributed with a supporting reinforcement seat 6, the travel mechanism 5 is installed on the reinforcement seat 6, and the cutter shaft 2 is connected with the travel mechanism 5 in a transmission connection through a fixed ring gear 7, the cutter assembly 3 includes a ring frame 8, and a plurality of evenly arranged cutter units 9 connected to one side of the ring frame 8, the ring frame 8 is vertically fixed with the cutter changing plate 4 by setting a support plate, and the cutter changing plate 4 is distributed in the plate groove opened on the cutter shaft 2, reference Figure 2 It is understood that the tool changing plate 4 slides through the plate hole opened on the tool shaft 2, so that the tool changing plate 4 and the two ring frames 8 can move synchronously along the axial direction of the tool shaft 2, and the tool shaft 2 is movably sleeved in the through hole opened on the reinforcement seat 6, and the reinforcement seat 6 is fixed on the machine tool of the prior art gear hobbing machine. The motor drive mechanism in the gear hobbing machine drives the tool shaft 2 to rotate, and then the whole composed of the cutter disc 1, tool shaft 2, tool assembly 3 and tool changing plate 4 rotates, while the whole composed of the stroke mechanism 5 and the reinforcement seat 6 does not rotate, but the stroke mechanism 5 can axially drive the tool changing plate 4 in the orbiting motion, and then the tool changing plate 4 controls the two tool assemblies 3 to complete the cutting tool replacement work.

[0038] refer to Figure 5 It is understood that a plurality of grooves are evenly arranged at the outer edge of the cutter disc 1, and the tool unit 9 includes a cutting knife 12 arranged in the groove of the cutter disc 1, a unit frame 14 arranged on one side of the cutting knife 12, a guide square tube 11 arranged on the other side of the cutting knife 12, a pad 13 sliding through a plate hole opened on the unit frame 14, and a pullback spring 10 fixed on the guide square tube 11. The cutting knife 12 slides through the inner hole of the guide square tube 11 by setting a pillar, and the pillar and the pullback spring 10 are connected. The guide square tube 11 and the unit frame 14 are respectively fixed on the bottom surfaces of both sides of the cutter disc 1, one end of the pad 13 is provided with a bevel, and the other end is fixedly connected to the ring frame 8, and the bevel end on the pad 13 is inserted into the plate groove opened on the cutting knife 12 to make the cutting knife 12 extend on the cutter disc 1.

[0039] Two tool assemblies 3 are installed on the tool disc 1, and multiple cutting knives 12 are arranged on each tool assembly 3. The cutting knives 12 on one tool assembly 3 extend out of the edge of the tool disc 1, and the cutting knives 12 on the other tool assembly 3 are retracted. The extended cutting knives 12 quickly revolve around as the tool disc 1 rotates. When the disc-shaped workpiece to be processed approaches, the revolving cutting knives 12 cut the workpiece. As the cutting time increases, the cutting knives 12 themselves overheat and need to be replaced and cooled. Then the originally extended cutting knives 12 will retract, and the adjacent cutting knives will be replaced. 12 will extend out to continue to complete the cutting work. The replacement work is achieved by the tool changing plate 4 driving the two ring frames 8 to move. The axial movement of the ring frame 8 drives the pad 13, and the pad 13 is pulled out from the cutting knife 12. Then, under the pull-back spring 10, the cutting knife 12 retracts into the cutter disc 1, and the adjacent cutting knife 12 plate groove will be inserted by the corresponding pad 13. During the insertion of the pad 13, the pad 13 will push the cutting knife 12 to extend out on the cutter disc 1, so that the adjacent cutting knife 12 replaces the overheated cutting knife 12 to complete the subsequent cutting.

[0040] refer to Figure 7 It is understood that the travel mechanism 5 includes a first control frame 16 and a second control frame 18 fixed on the reinforcement seat 6, a tail assembly 15 supported on the second control frame 18, a head assembly 17 supported on the first control frame 16, and a control ring plate 19 transmission connected to one end of the tail assembly 15, the ring gear 7 and the head assembly 17 are transmission connected, one end of the tool changing plate 4 is clamped with the inner edge of the control ring plate 19 by setting an I-shaped roller 20, and the other end of the tail assembly 15 is transmission connected to the head assembly 17.

[0041] refer to Figure 8 It is understood that the head assembly 17 includes a fixed-speed gear 23 meshing and transmission connected to the ring gear 7, a fixed-speed worm 22 fixed in the middle of the fixed-speed gear 23, a speed change group 24 transmission connected to the tail assembly 15, and a fixed-speed disk group 21 establishing transmission between the speed change group 24 and the fixed-speed worm 22, and the fixed-speed worm 22 is movably sleeved in a through hole opened on the first control frame 16.

[0042] refer to Fig. 9 It is understood that the constant speed disk group 21 includes a support gear 27 meshing and drivingly connected to the constant speed worm 22, a first central axis 29 fixed in the middle of the support gear 27, a constant speed disk 25 distributed on one side of the support gear 27, a plurality of direction slide columns 28 arranged around the constant speed disk 25, and a spring 26 sleeved on the direction slide column 28, the direction slide column 28 slides through a through hole opened on the edge of the support gear 27, the spring 26 is supported between the constant speed disk 25 and the support gear 27, and the first central axis 29 is movably sleeved in a through hole opened on the first control frame 16.

[0043] refer to Fig. 9It is understood that the speed change group 24 includes an L-shaped adjustment plate 33 with one end sliding through a square hole opened on the first control frame 16, a threaded column 32 and a speed change shaft 31 supported on the L-shaped adjustment plate 33, and a rubber disk 30 fixed at one end of the speed change shaft 31. The speed change shaft 31 and the threaded column 32 are respectively movably sleeved on two holes opened on the L-shaped adjustment plate 33, and the threaded column 32 passes through the internal threaded hole opened on the first control frame 16. The outer edge of the rubber disk 30 is in contact with the bottom surface of the fixed speed disk 25 for transmission.

[0044] The tail assembly 15 includes a speed reduction gear 34, a speed reduction worm 35, a spring group 36, a horizontal worm 37 and a crank group 38. One end of the crank group 38 is connected to the control ring plate 19, and the horizontal worm 37 is transmission-connected between the crank group 38 and the spring group 36. One side of the spring group 36 is transmission-connected with the speed reduction gear 34. One end of the speed reduction worm 35 is meshed and transmission-connected with a long cylinder gear fixed on the speed change shaft 31 through a fixed gear, and the helical teeth on the speed reduction worm 35 are meshed and transmission-connected with the speed reduction gear 34. The horizontal worm 37 is movably sleeved in a through hole opened on the second control frame 18.

[0045] The spring 26 applies pressure to stabilize the contact transmission between the rubber disc 30 and the speed plate 25. Fig. 9 The speed of the fixed speed disk 25 remains unchanged. If the rubber disk 30 rises and approaches the edge of the fixed speed disk 25, the speed of the rubber disk 30 will automatically increase. Conversely, if it approaches the center of the fixed speed disk 25, the speed of the rubber disk 30 will decrease. The axial movement of the rubber disk 30 is achieved by adjusting the threaded column 32. The cutting device is preset by rotating the threaded column 32 before working. The threaded column 32 drives the L-shaped adjustment plate 33 to move, and then the speed change shaft 31 moves axially to drive the rubber disk 30, and the speed change shaft 31 and the speed reduction worm 35 always maintain a state of meshing transmission connection.

[0046] The spring group 36 includes a low-speed shaft 41 vertically fixed in the middle of the speed reduction gear 34, a spring 39 fixed on the low-speed shaft 41, an outer gear ring 42 fixed outside the spring 39, a restraining frame 40 fixed on the bottom surface of one side of the outer gear ring 42, and a stopping spring 43 fixed on the second control frame 18. The low-speed shaft 41 is movably sleeved in a through hole opened in the middle of the restraining frame 40, and one end of the stopping spring 43 alternately engages with the two end protrusions on the rotating restraining frame 40. The low-speed shaft 41 is also movably sleeved in the through hole opened in the second control frame 18, and one end of the transverse worm 37 is connected to the outer gear ring 42 through a meshing transmission connection with the fixed shaft gear.

[0047] refer to Fig.12The low-speed shaft 41 supports the restraining frame 40, and then the restraining frame 40 and the outer gear ring 42 remain in position, and the outer gear ring 42 and the low-speed shaft 41 can rotate relative to each other. The counterclockwise rotation of the low-speed shaft 41 will cause the mainspring 39 to contract and accumulate force. After the force is accumulated enough, the outer gear ring 42 will drive the restraining frame 40 to rotate, that is, the restraining frame 40 breaks through the interception of the intercepting shrapnel 43. Under the influence of the blocking position of the intercepting shrapnel 43, the mainspring 39 and the restraining frame 40 will rotate half a circle, and when the mainspring 39 accumulates enough force next time, the outer gear ring 42 will continue to rotate The outer gear ring 42 rotates half a circle in this cycle, and each time it rotates half a circle. Here, the interval time between two rotations of the outer gear ring 42 can be adjusted and set. In principle, the speed of the low-speed shaft 41 can be set. There is a transmission path between the knife shaft 2 and the low-speed shaft 41. The speed of the knife shaft 2 remains unchanged, but the speed of the rubber disk 30 in the transmission path can be set and changed. Therefore, the subsequent transmission causes the speed of the low-speed shaft 41 to change, and finally the outer gear ring 42 completes a half-circle rotation, corresponding to the subsequent replacement of the cutting tool.

[0048] The crank group 38 includes a second central axis 44, a crank disk 45, a connecting rod 46 and an L-shaped push-pull plate 47. The second central axis 44 is movably sleeved in a through hole opened on the second control frame 18. One end of the second central axis 44 is fixed to the middle of the crank disk 45. The second central axis 44 is connected to the helical teeth on the fixed cylinder gear and the horizontal worm 37 through the meshing transmission. One end of the connecting rod 46 is hinged to the crank disk 45, and the other end is hinged to one end of the L-shaped push-pull plate 47. The other end of the L-shaped push-pull plate 47 is fixedly connected to the control ring plate 19, and the L-shaped push-pull plate 47 slides through the plate hole opened on the second control frame 18.

[0049] A cutting process for gear machining comprises the following steps:

[0050] Step 1: Fix the workpiece to be processed on the workpiece table of the gear hobbing machine. The workpiece table drives the workpiece to approach the rotating cutting device. The cutter head 1 drives one tool assembly 3 to rotate to cut the workpiece, and the other opposite tool assembly 3 is in a resting and cooling state.

[0051] Step 2: After the tool shaft 2 rotates a specified number of times, the travel mechanism 5 drives the tool changing plate 4 to move in one direction, so as to control the tool assembly 3 that is originally cutting to deform and shrink, and the deformed and shrunk tool assembly 3 is separated from the workpiece;

[0052] Step 3: At the same time, the unidirectionally moving tool changing plate 4 will also drive the resting and cooling tool integration 3 to deform and expand, and the expanded tool integration 3 contacts the cutting workpiece;

[0053] Step 4: Every time the cutter shaft 2 rotates a specified number of times, the cutting device automatically completes the tool replacement work until the workpiece is cut into a gear product.

[0054] The rotation of the knife shaft 2 drives the ring gear 7 to rotate, and then drives the fixed-speed worm 22 through the fixed-speed gear 23, and then the support gear 27 rotates to drive the direction sliding column 28 to move around, and then the fixed-speed plate 25 rotates to drive the rubber plate 30 to rotate, and then the speed reduction worm 35 is driven through the speed change shaft 31, causing the synchronous rotation of the speed reduction gear 34 and the low-speed shaft 41, and the rotation of the low-speed shaft 41 causes the mainspring 39 to contract and store force. After the force is stored enough, the mainspring 39 drives the outer ring gear 42 to rotate half a circle, and the outer ring gear 42 drives the horizontal worm 37, and then the transmission makes the first The second center shaft 44 and the crank plate 45 rotate half a circle, and the L-shaped push-pull plate 47 is driven to translate through the connecting rod 46. The L-shaped push-pull plate 47 drives the control ring plate 19 in the directional movement, and then drives the tool changing plate 4 to translate through the I-shaped roller 20. As mentioned before, the tool changing plate 4 drives the ring frame 8 to move in a directional manner once to complete a tool replacement. After a period of time, the outer gear ring 42 rotates half a circle again, and the tool changing plate 4 will translate in the opposite direction. The transmission control allows the resting and cooling tools to be put back into work. This cycle continues, and the two sets of ring-mounted tools perform cutting work alternately.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cutting device for gear machining, comprising a cutter disc (1), characterized in that: A through-going cutter shaft (2) is fixed in the middle of the cutter disc (1), two opposite cutter assemblies (3) are arranged at the outer edge of the cutter disc (1), and the two cutter assemblies (3) are arranged to rotate with each other and are arranged alternately, one side of the cutter shaft (2) is connected to the two cutter assemblies (3) by arranging a cutter changing plate (4), and one end of the cutter changing plate (4) is connected to a travel mechanism (5) in a transmission manner, one end of the cutter shaft (2) is distributed with a supporting reinforcement seat (6), the travel mechanism (5) is installed on the reinforcement seat (6), and the cutter shaft (2) is connected to the travel mechanism (5) in a transmission manner by a fixed ring gear (7), the cutter assembly (3) comprises a ring frame (8), and a plurality of evenly arranged cutter units (9) connected to one side of the ring frame (8), the ring frame (8) is vertically fixed to the cutter changing plate (4) by arranging a support plate, and the cutter changing plate (4) is distributed in a plate groove opened on the cutter shaft (2).

2. A cutting device for gear machining according to claim 1, characterized in that: The outer edge of the cutter disc (1) is evenly circumferentially provided with a plurality of grooves. The cutter unit (9) comprises a cutting knife (12) arranged in the groove of the cutter disc (1), a unit frame (14) arranged on one side of the cutting knife (12), a guide square tube (11) arranged on the other side of the cutting knife (12), a pad (13) slidingly passing through a plate hole provided on the unit frame (14), and a retraction spring (10) fixed on the guide square tube (11). The cutting knife (12) slides through the inner hole of the guide square tube (11) by providing a support column, and the support column and the retraction spring (10) are connected. The guide square tube (11) and the unit frame (14) are respectively fixed on the bottom surfaces of both sides of the cutter disc (1). One end of the pad (13) is provided with an inclined surface, and the other end is fixedly connected to the ring frame (8). The inclined surface end on the pad (13) is inserted into the plate groove provided on the cutting knife (12) to make the cutting knife (12) extend out of the cutter disc (1).

3. A cutting device for gear machining according to claim 1, characterized in that: The travel mechanism (5) comprises a first control frame (16) and a second control frame (18) fixed on a reinforcement seat (6), a tail assembly (15) supported on the second control frame (18), a head assembly (17) supported on the first control frame (16), and a control ring plate (19) drivingly connected to one end of the tail assembly (15); the ring gear (7) is drivingly connected to the head assembly (17); one end of the tool changing plate (4) is clamped with the inner edge of the control ring plate (19) by arranging an I-shaped roller (20); and the other end of the tail assembly (15) is drivingly connected to the head assembly (17).

4. A cutting device for gear machining according to claim 3, characterized in that: The head assembly (17) comprises a fixed-speed gear (23) meshingly connected to the ring gear (7), a fixed-speed worm (22) fixed in the middle of the fixed-speed gear (23), a speed change group (24) connected to the tail assembly (15), and a fixed-speed disc group (21) for establishing transmission between the speed change group (24) and the fixed-speed worm (22), and the fixed-speed worm (22) is movably sleeved in a through hole opened on the first control frame (16).

5. A cutting device for gear machining according to claim 4, characterized in that: The fixed speed disc assembly (21) comprises a support gear (27) meshingly connected to the fixed speed worm (22), a first middle shaft (29) fixed in the middle of the support gear (27), a fixed speed disc (25) distributed on one side of the support gear (27), a plurality of direction sliding columns (28) arranged around the fixed speed disc (25), and a spring (26) sleeved on the direction sliding column (28), the direction sliding column (28) slidingly passes through a through hole opened on the edge of the support gear (27), the spring (26) is supported between the fixed speed disc (25) and the support gear (27), and the first middle shaft (29) is movably sleeved in a through hole opened on the first control frame (16).

6. A cutting device for gear machining according to claim 5, characterized in that: The speed change group (24) comprises an L-shaped adjustment plate (33) with one end sliding through a square hole provided on the first control frame (16), a threaded column (32) and a speed change shaft (31) supported on the L-shaped adjustment plate (33), and a rubber disk (30) fixed to one end of the speed change shaft (31); the speed change shaft (31) and the threaded column (32) are respectively movably sleeved on two holes provided on the L-shaped adjustment plate (33), and the threaded column (32) passes through an internal threaded hole provided on the first control frame (16); and the outer edge of the rubber disk (30) is in contact with the bottom surface of the fixed speed disk (25) for transmission.

7. A cutting device for gear machining according to claim 6, characterized in that: The tail assembly (15) comprises a speed reduction gear (34), a speed reduction worm (35), a spring group (36), a transverse worm (37) and a crank group (38). One end of the crank group (38) is connected to the control ring plate (19). The transverse worm (37) is transmission-connected between the crank group (38) and the spring group (36). One side of the spring group (36) is transmission-connected with the speed reduction gear (34). One end of the speed reduction worm (35) is meshed and transmission-connected with a long cylindrical gear fixed on the speed change shaft (31) through a fixed gear, and the spiral teeth on the speed reduction worm (35) are meshed and transmission-connected with the speed reduction gear (34). The transverse worm (37) is movably sleeved in a through hole opened on the second control frame (18).

8. A cutting device for gear machining according to claim 7, characterized in that: The spring assembly (36) comprises a low-speed shaft (41) vertically fixed in the middle of the speed reduction gear (34), a spring (39) fixedly sleeved on the low-speed shaft (41), an outer gear ring (42) of the outer fixed sleeve of the spring (39), a restraining frame (40) fixed on the bottom surface of one side of the outer gear ring (42), and a stop spring (43) fixed on the second control frame (18); the low-speed shaft (41) is movably sleeved in a through hole opened in the middle of the restraining frame (40); one end of the stop spring (43) alternately engages with two end protrusions on the rotating restraining frame (40); the low-speed shaft (41) is also movably sleeved in a through hole opened in the second control frame (18); one end of the transverse worm (37) is connected to the outer gear ring (42) through meshing transmission via a fixed shaft gear.

9. A cutting device for gear machining according to claim 8, characterized in that: The crank assembly (38) comprises a second central shaft (44), a crank plate (45), a connecting rod (46) and an L-shaped push-pull plate (47); the second central shaft (44) is movably sleeved in a through hole provided on the second control frame (18); one end of the second central shaft (44) is fixed to the middle of the crank plate (45); the second central shaft (44) is connected to the helical teeth on the fixed cylinder gear and the transverse worm (37) by meshing transmission; one end of the connecting rod (46) is hinged to the crank plate (45), and the other end is hinged to one end of the L-shaped push-pull plate (47); the other end of the L-shaped push-pull plate (47) is fixedly connected to the control ring plate (19); the L-shaped push-pull plate (47) slides through the plate hole provided on the second control frame (18).

10. A cutting process for gear machining, using the cutting device for gear machining according to claim 1, characterized in that: The following steps are involved: Step 1: fix the workpiece to be processed on the workpiece table of the gear hobbing machine, and the workpiece table drives the workpiece to approach the rotating cutting device, and the cutter disc (1) drives a tool assembly (3) to rotate to cut the workpiece, and the other opposite tool assembly (3) is in a resting and cooling state; Step 2: After the tool shaft (2) rotates a specified number of times, the travel mechanism (5) drives the tool changing plate (4) to move in one direction, thereby controlling the tool assembly (3) that is originally performing cutting to deform and shrink, and the deformed and shrunk tool assembly (3) is separated from the workpiece; Step 3: At the same time, the unidirectionally moving tool changing plate (4) will also drive the resting and cooling tool assembly (3) to deform and expand, and the expanded tool assembly (3) will contact the cutting workpiece; Step 4: Every time the cutter shaft (2) rotates a specified number of times, the cutting device automatically completes the tool replacement work until the workpiece is cut into a gear product.

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