Tooth profile positioning and milling device for low-precision gear production

Abstract

The invention belongs to the technical field of gear machining, and discloses a low-precision gear production tooth profile positioning and milling device which comprises a base and further comprises a milling assembly movably mounted at one end of the top of the base. The tooth blank is fixed to one side of the butt joint assembly, the movable ring is installed on the other side of the butt joint assembly, the number of the round holes is consistent with that of the tooth grooves of the tooth blank, at the moment, the limiting rods are located in the round grooves, the transmission rod moves reversely after machining one tooth groove of the tooth blank is completed, and the transmission rod is separated from one round hole; at the moment, the movable ring, the butt-joint assembly and the tooth blank rotate, the limiting rod is clamped in the next round hole to limit and fix the movable ring, in this way, the tooth blank is machined through feeding of the milling assembly in a reciprocating mode, the limiting rod is sequentially clamped in the round holes, tooth groove machining can be conducted on the tooth blank through the milling assembly, and machining of the tooth blank is completed after the movable ring rotates by one circle. In the process, manual experience is reduced, and the risk of errors is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of gear processing, and specifically relates to a tooth profile positioning milling device for low-precision gear production. Background Art

[0002] Gear milling is a method of machining gear tooth profiles through a milling machine or a special gear milling machine. Its basic principle is to use a rotating milling cutter to cut the gear blank to form the required tooth profile. Currently, in gear production, a dividing head is usually used to position the gear blank. The workpiece is rotated to a predetermined angle and fixed by the dividing head, and the tooth profile is cut one by one using a milling cutter. First, the dividing angle of each tooth is calculated according to the number of teeth and modulus of the gear, and then the workpiece is rotated to the required angle and locked by the dividing head, and then the tooth profile is rough-milled and finish-milled using a milling cutter. After finishing the machining of one tooth, the dividing head is loosened, rotated to the position of the next tooth, and the above steps are repeated until all teeth are machined. However, the current technology of indexing and machining each tooth separately results in low production efficiency. Each indexing may produce a small error, and the errors accumulate after multiple indexings, affecting the overall accuracy of the gear. In addition, the operation process is complex and relies on manual experience, increasing the risk of human error. Therefore, a tooth profile positioning milling device for low-precision gear production is proposed. Summary of the Invention

[0003] To solve the problems raised in the above background art, the present invention provides a tooth profile positioning milling device for low-precision gear production, which solves the problems of low production efficiency caused by indexing and machining each tooth separately in the prior art, complex operation process and reliance on manual experience, and increased risk of human error.

[0004] To achieve the above object, the present invention provides the following technical solution: A tooth profile positioning milling device for low-precision gear production, including a base, and further including: A milling component, which is movably installed at one end of the top of the base; A docking component, which is arranged at the other end of the top of the base; A clamping component, which is fixedly installed on the docking component; A transmission component, which is installed on the side of the docking component; A limiting component, which is fixedly installed on the top of the base; Among them, the transmission component includes a movable ring fixedly installed on one side of the docking component. Circular holes are annularly arranged on the movable ring, and a circular groove is arranged on the side of the movable ring; The clamping component includes a gear blank fixedly installed on the other side of the docking component. The number of circular holes is the same as the number of tooth grooves of the gear blank; The limiting component includes a C-shaped frame fixedly installed on the top of the base. A guide rod is movably installed on the C-shaped frame. A spring is arranged between the guide rod and the C-shaped frame. One end of the guide rod is fixedly installed with a limiting rod that is engaged in the circular hole. The gear blank is fixed to the side of the docking component and is engaged in the circular hole through the limiting rod. The milling component moves to process one tooth groove of the gear blank. At the same time, the milling component pushes the limiting rod out of one circular hole. At this time, the movable ring rotates and the limiting rod is engaged in the next circular hole.

[0005] Preferably, the transmission component further includes a guide groove opened in the circular hole. An internal movable sleeve of the circular hole is provided with a plugging block, and the plugging block slides in the guide groove. One end of the guide groove is fixedly installed with a third magnet, and the plugging block is located at one end of the guide groove under the action of the third magnet.

[0006] Preferably, a groove is opened at the top of the plugging block. The movable ring is provided with a plurality of pins arranged in a circular array. The number of the pins is the same as that of the circular holes, and one end of each pin is located in the circular hole.

[0007] Preferably, the milling component includes a milling cutter installed on the top of the base, and a transmission rod is fixedly installed on the milling cutter. The transmission rod is coaxial with the plugging block and the limiting rod. When the transmission rod moves towards the gear blank, the transmission rod pushes the plugging block to move along the circular hole. At the same time, the plugging block pushes the limiting rod out of one circular hole. At this time, the plugging block is located at one end of the circular hole, and the pin is engaged in the groove, so that the side of the plugging block and one end of the circular hole are on the same plane.

[0008] Preferably, a transmission ring is movably sleeved on the side of the movable ring. A plurality of elastic pieces are fixedly installed on the periphery of the transmission ring. The elastic pieces are in contact with the tops of the pins. A return elastic piece is arranged between the third magnet and the movable ring.

[0009] Preferably, the docking component includes a first fixing frame fixedly installed on the top of the base. A docking ring is movably installed in the middle of the first fixing frame, and a guide frame is fixedly installed on the side of the docking ring. A docking frame is fixedly installed on the side of the movable ring. The docking frame is engaged with the outside of the guide frame and is fixedly connected through a threaded rod. A rectangular through groove is opened on the first fixing frame, and the transmission rod moves through the rectangular through groove and enters the circular hole.

[0010] Preferably, the limiting component further includes a U-shaped frame fixed to the top of the C-shaped frame. Threaded sleeves are sleeved on both ends of the U-shaped frame, and balls are movably installed at the ends of the threaded sleeves.

[0011] Preferably, the clamping assembly comprises a second fixing frame fixedly mounted on the side of the docking ring, a support rod is threadedly sleeved on the second fixing frame, and an abutment block is movably mounted on one end of the support rod.

[0012] Preferably, the docking assembly further comprises a first support frame arranged in an annular array outside the docking ring, a first magnet is fixedly mounted on the side of the first support frame, a second support frame is fixedly mounted on the side of the first fixing frame, a second magnet is fixedly mounted on the side of the second support frame, and a protective cover sleeved on the second support frame and the outside of the docking ring is fixedly mounted on the side of the first fixing frame; The opposing surfaces of the second magnet and the first magnet have the same magnetic poles, and the second magnet and the first magnet have the same inclination direction.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention fixes the tooth blank to one side of the docking component, and the movable ring is installed on the other side of the docking component. The number of circular holes is consistent with the tooth grooves of the tooth blank. In the initial state, the limit rod is engaged with the inside of a circular hole to limit and fix the movable ring. The milling cutter moves along the base toward the tooth blank to groove it. During the movement of the milling cutter, the transmission rod enters the circular hole and pushes the limit rod to disengage from the inside of the circular hole. At this time, the limit rod is located in the circular groove. After the transmission rod completes the processing of a tooth groove of the tooth blank, it moves in the opposite direction. The transmission rod disengages from a circular hole. At this time, the movable ring, the docking component and the tooth blank rotate, and the limit rod will be engaged with the next circular hole to limit and fix the movable ring. In this way, the milling component is reciprocated to feed the tooth blank for processing. The limit rod is engaged in the circular hole in turn, and the tooth groove of the tooth blank can be processed by the milling component. After the movable ring rotates one circle, the processing of the tooth blank is completed. In this process, the reliance on manual experience is reduced, and the risk of error is reduced. The present invention pushes the limiting rod to disengage from the inside of the circular hole through a transmission rod entering the circular hole, and performs tooth groove processing on the tooth blank through a milling cutter. The limiting rod is disengaged from the inside of a circular hole. After one tooth groove is processed, the milling assembly moves in the opposite direction, and the second magnet and the first magnet drive the docking ring and the movable ring to rotate. During the rotation process, since the limiting rod is located in the circular groove, the next circular hole and the limiting rod remain coaxial. The limiting rod is engaged with the inside of the next circular hole under the action of a spring, and the movable ring, the docking ring and the tooth blank are limited and fixed. In this way, the tooth blank can be grooved in turn by reciprocating. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the plane structure of the present invention; Figure 2 It is a schematic diagram of the overall appearance structure of the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the docking assembly of the present invention; Figure 4 Schematic cross-sectional structure diagram of the transmission component, docking component and clamping component of the present invention; Figure 5 For the present invention Figure 4 Enlarged structure diagram at position A in Figure 6 Schematic cooperation structure diagram of the limit component and the transmission component of the present invention; Figure 7 Schematic cooperation structure diagram of the transmission component and the docking component of the present invention; Figure 8 For the present invention Figure 7 Enlarged structure diagram at position B in

[0015] In the figure: 1. Base; 2. Milling component; 21. Transmission rod; 22. Milling cutter; 3. Docking component; 30. Guide frame; 31. First fixing frame; 32. Rectangular through slot; 33. Docking ring; 34. Protective cover; 35. First support frame; 36. First magnet; 37. Second magnet; 38. Second support frame; 4. Clamping component; 41. Second fixing frame; 42. Support rod; 43. Tooth blank; 44. Contact block; 5. Transmission component; 51. Movable ring; 52. Threaded rod; 53. Docking frame; 511. Round hole; 512. Circular groove; 513. Plugging block; 514. Groove; 515. Third magnet; 516. Reset elastic piece; 517. Elastic piece; 518. Pin; 519. Support ring; 6. Limit component; 61. C-shaped frame; 62. Guide rod; 63. Spring; 64. Limit rod; 611. U-shaped frame; 612. Screw; 613. Ball. Detailed implementation method

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] As Figures 1 to 8 shown, the present invention provides a tooth profile positioning milling device for low-precision gear production, including a base 1, and further including: A milling component 2, which is movably installed at one end of the top of the base 1; A docking component 3, which is arranged at the other end of the top of the base 1; A clamping component 4, which is fixedly installed on the docking component 3; A transmission component 5, which is installed on the side of the docking component 3; A limit component 6, which is fixedly installed on the top of the base 1; Among them, the transmission assembly 5 includes a movable ring 51 fixedly installed on one side of the docking assembly 3. Circular holes 511 are annularly and arrayedly formed on the movable ring 51, and a circular groove 512 is formed on the side of the movable ring 51; The clamping assembly 4 includes a gear blank 43 fixedly installed on the other side of the docking assembly 3. The number of circular holes 511 is the same as the number of tooth grooves of the gear blank 43; The limiting assembly 6 includes a C-shaped frame 61 fixedly installed on the top of the base 1. A guide rod 62 is movably installed on the C-shaped frame 61. A spring 63 is arranged between the guide rod 62 and the C-shaped frame 61. One end of the guide rod 62 is fixedly installed with a limiting rod 64 clamped in the circular hole 511; The gear blank 43 is fixed on the side of the docking assembly 3. The limiting rod 64 is clamped in the circular hole 511. The milling assembly 2 moves to process one tooth groove of the gear blank 43. At the same time, the milling assembly 2 pushes the limiting rod 64 out of one circular hole 511. At this time, the movable ring 51 rotates and the limiting rod 64 is clamped in the next circular hole 511.

[0018] The transmission assembly 5 further includes a guide groove formed in the circular hole 511. A plug block 513 is movably sleeved inside the circular hole 511. The plug block 513 slides in the guide groove; One end of the guide groove is fixedly installed with a third magnet 515. The plug block 513 is located at one end of the guide groove under the action of the third magnet 515; A groove 514 is formed on the top of the plug block 513. Clamping pins 518 are annularly and arrayedly arranged on the movable ring 51. The number of clamping pins 518 is the same as the number of circular holes 511, and one end of the clamping pin 518 is located inside the circular hole 511; The milling assembly 2 includes a milling cutter 22 installed on the top of the base 1. A transmission rod 21 is fixedly installed on the milling cutter 22; The transmission rod 21 is coaxial with the plug block 513 and the limiting rod 64; By moving the transmission rod 21 towards the gear blank 43, the transmission rod 21 pushes the plug block 513 to move along the circular hole 511. At the same time, the plug block 513 pushes the limiting rod 64 out of one circular hole 511. At this time, the plug block 513 is located at one end of the circular hole 511, and the clamping pin 518 is clamped in the groove 514, so that the side of the plug block 513 is flush with one end of the circular hole 511.

[0019] The tooth embryo 43 is fixed to one side of the docking component 3, and the movable ring 51 is installed on the other side of the docking component 3. The number of circular holes 511 is consistent with the tooth grooves of the tooth embryo 43. In the initial state, the limiting rod 64 is engaged with the inside of a circular hole 511 to limit and fix the movable ring 51. The milling cutter 22 moves along the base 1 toward the tooth embryo 43 to groove it. During the movement of the milling cutter 22, the transmission rod 21 enters the circular hole 511, pushing the blocking block 513 to move along the guide groove and the circular hole 511, and the blocking block 513 conflicts with the limiting rod 64, pushing the limiting rod 64 out of the circular hole 511. At this time, the bayonet 518 is engaged with the inside of the groove 514, and the side of the blocking block 513 is in contact with the circular hole 511. The end face of the hole 511 maintains a plane, and the limit rod 64 is located in the circular groove 512. After the transmission rod 21 completes the processing of a tooth groove of the tooth embryo 43, it moves in the opposite direction, and the transmission rod 21 is separated from a circular hole 511. At this time, the movable ring 51, the docking assembly 3 and the tooth embryo 43 rotate, and the limit rod 64 will be engaged in the next circular hole 511 to limit and fix the movable ring 51, so that the tooth embryo 43 is fed back and forth through the milling assembly 2 for processing. The limit rod 64 is engaged in the circular hole 511 in turn, and the tooth groove of the tooth embryo 43 can be processed by the milling assembly 2. After the movable ring 51 rotates one circle, the processing of the tooth embryo 43 is completed. In this process, the reliance on manual experience is reduced and the risk of error is reduced.

[0020] like Figures 4 - 8 As shown, a transmission ring 519 is provided on the side movable sleeve of the movable ring 51 , and a spring piece 517 is fixedly mounted on the outer annular array of the transmission ring 519 . The spring piece 517 contacts the top of the latch 518 , and a reset spring piece 516 is provided between the transmission ring 519 and the movable ring 51 .

[0021] The blocking block 513 is pushed by the transmission rod 21 to move along the guide groove and the circular hole 511, and the blocking block 513 pushes the limiting rod 64 to be separated from the inside of the circular hole 511. At this time, the latch 518 is engaged with the inside of the groove 514 under the action of the spring 517, so that the blocking block 513 is located at one end of the circular hole 511, so that the end face of the circular hole 511 blocks the one end of the circular hole 511, and the limiting rod 64 is located inside the circular groove 512. The limiting rod 64 is sequentially engaged with the circular hole 511, and the tooth groove of the tooth embryo 43 can be processed by the milling assembly 2; After the movable ring 51 rotates one circle, the processing of the tooth embryo 43 is completed, and the movable ring 51 is removed and separated from the side of the docking assembly 3. At this time, the blocking blocks 513 can be pushed in sequence, so that the latch 518 compresses the end of the spring sheet 517 and separates it from the inside of the groove 514. The blocking block 513 moves in the opposite direction under the action of the third magnet 515 and contacts the third magnet 515, so that the tooth embryo 43 can be recycled and processed; Meanwhile, by replacing the movable ring 51 with circular holes 511 that are consistent with the number of tooth grooves according to the number of tooth grooves processed in the tooth blank 43, the tooth blank 43 with different numbers of teeth can be processed, avoiding the need to rely on manual experience to process the tooth blank 43.

[0022] As Figure 6 shown in Figure 7 Figure, the docking component 3 includes a first fixing frame 31 fixedly installed on the top of the base 1. A docking ring 33 is movably installed in the middle of the first fixing frame 31, and a guiding frame 30 is fixedly installed on the side of the docking ring 33. A docking frame 53 is fixedly installed on the side of the movable ring 51. The docking frame 53 is clamped outside the guiding frame 30 and fixedly connected by a threaded rod 52. A rectangular through groove 32 is formed on the first fixing frame 31. The transmission rod 21 moves through the rectangular through groove 32 and enters the circular hole 511. The limiting component 6 further includes a U-shaped frame 611 fixed to the top of the C-shaped frame 61. Threaded sleeves 612 are sleeved at both ends of the U-shaped frame 611, and balls 613 are movably installed at the ends of the threaded rods 612.

[0023] The movable ring 51 is sleeved outside the guiding frame 30 through the docking frame 53, and the movable ring 51 is fixedly installed on the side of the first fixing frame 31 by the threaded rod 52, so that the movable ring 51 and the guiding frame 30 are coaxial. The limiting rod 64 is clamped inside the circular hole 511 under the action of the spring 63 to fixedly limit the movable ring 51, the docking ring 33 and the tooth blank 43. Meanwhile, rotate the threaded rod 612 to make the ball 613 contact the side of the movable ring 51, and improve the stability of the movable ring 51 through the threaded rod 612 and the ball 613.

[0024] As Figure 2 shown in Figure 4 Figure, the clamping component 4 includes a second fixing frame 41 fixedly installed on the side of the docking ring 33. A support rod 42 is threadedly sleeved on the second fixing frame 41, and a contact block 44 is movably installed at one end of the support rod 42.

[0025] By placing the tooth blank 43 on the side of the docking ring 33 and rotating the support rod 42 to push the contact block 44 to clamp the tooth blank 43, the tooth blank 43 is fixed on the side of the docking ring 33, and the milling process can be carried out on the tooth blank 43.

[0026] As Figure 3 shown in Figure 4As shown, the docking component 3 further includes a first support frame 35 arranged in an annular array outside the docking ring 33. A first magnet 36 is fixedly installed on the side of the first support frame 35. A second support frame 38 is fixedly installed on the side of the first fixing frame 31. A second magnet 37 is fixedly installed on the side of the second support frame 38. A protective cover 34 sleeving the outside of the second support frame 38 and the docking ring 33 is fixedly installed on the side of the first fixing frame 31; The opposite faces of the second magnet 37 and the first magnet 36 are like magnetic poles, and the inclination directions of the second magnet 37 and the first magnet 36 are the same.

[0027] The transmission rod 21 enters the round hole 511 to push the limiting rod 64 out of the inside of the round hole 511, and the milling cutter 22 performs a tooth slot opening process on the gear blank 43. The limiting rod 64 disengages from the inside of one round hole 511. After one tooth slot is processed, the milling component 2 moves in the reverse direction. Driven by the second magnet 37 and the first magnet 36, the docking ring 33 and the movable ring 51 rotate. During the rotation, since the limiting rod 64 is located in the circular groove 512, the next round hole 511 is coaxial with the limiting rod 64. The limiting rod 64 is engaged with the inside of the next round hole 511 under the action of the spring 63, so as to limit and fix the movable ring 51, the docking ring 33 and the gear blank 43. By repeating this process, the gear blank 43 can be successively grooved.

[0028] The working principle and usage process of the present invention: The movable ring 51 is sleeved outside the guiding frame 30 through the docking frame 53, and the movable ring 51 is fixedly installed on the side of the first fixing frame 31 through the threaded rod 52, so that the movable ring 51 and the docking ring 33 are coaxial. The limiting rod 64 is engaged with the inside of the round hole 511 under the action of the spring 63 to limit and fix the movable ring 51, the docking ring 33 and the gear blank 43. The gear blank 43 is placed on the side of the docking ring 33. The supporting rod 42 is rotated to push the abutting block 44 to clamp the gear blank 43, so that the gear blank 43 is fixed on the side of the docking ring 33, and then the milling process can be performed on the gear blank 43; In the initial state, the limiting rod 64 is engaged with the inside of one round hole 511 to limit and fix the movable ring 51. The milling cutter 22 moves along the base 1 towards the gear blank 43 for grooving. During the movement of the milling cutter 22, the transmission rod 21 enters the round hole 511, and pushes the plugging block 513 to move along the guiding groove and the round hole 511. The plugging block 513 abuts against the limiting rod 64 and pushes the limiting rod 64 out of the inside of the round hole 511. At this time, the latch 518 is engaged with the inside of the groove 514, and the side of the plugging block 513 is flush with the end face of the round hole 511. At this time, the limiting rod 64 is located in the circular groove 512. After the transmission rod 21 finishes processing one tooth slot of the gear blank 43, it moves in the reverse direction, and the transmission rod 21 disengages from one round hole 511; Driven by the second magnet 37 and the first magnet 36, the docking ring 33 and the movable ring 51 rotate. During the rotation process, since the limiting rod 64 is located in the circular groove 512, the next round hole 511 is coaxial with the limiting rod 64. Under the action of the spring 63, the limiting rod 64 is engaged inside the next round hole 511 to limit and fix the movable ring 51, the docking ring 33 and the gear blank 43. After the movable ring 51 rotates one week and the gear blank 43 is processed, the movable ring 51 is removed from the side of the docking assembly 3. At this time, the plug block 513 can be pushed in sequence, so that the latch 518 compresses the end of the elastic piece 517 to disengage from the inside of the groove 514. Under the action of the third magnet 515, the plug block 513 moves in the reverse direction and contacts the third magnet 515, and then the processing of the gear blank 43 can be recycled. At the same time, according to the number of tooth grooves processed on the gear blank 43, the movable ring 51 with the same number of round holes 511 as the number of tooth grooves is replaced, so that the gear blanks 43 with different numbers of teeth can be processed, avoiding the need to rely on manual experience to process the gear blank 43.

[0029] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tooth profile positioning milling device for low-precision gear production, comprising a base (1), characterized in that: Also includes: A milling assembly (2), the milling assembly being movably mounted on one end of the top of the base; A docking assembly (3), the docking assembly being arranged at the other end of the top of the base; A clamping assembly (4), the clamping assembly being fixedly mounted on the docking assembly; A transmission assembly (5), the transmission assembly being mounted on a side of the docking assembly; A limit assembly (6), the limit assembly being fixedly mounted on the top of the base; The transmission assembly (5) comprises a movable ring (51) fixedly mounted on one side of the docking assembly (3), the movable ring (51) is provided with circular holes (511) in an annular array, and the side of the movable ring (51) is provided with a circular groove (512); The clamping component (4) comprises a tooth embryo (43) fixedly mounted on the other side of the docking component (3), and the number of the circular holes (511) is the same as the number of tooth grooves of the tooth embryo (43); The limiting assembly (6) comprises a C-shaped frame (61) fixedly mounted on the top of the base (1), a guide rod (62) being movably mounted on the C-shaped frame (61), a spring (63) being arranged between the guide rod (62) and the C-shaped frame (61), and a limiting rod (64) being fixedly mounted on one end of the guide rod (62) and being engaged in the circular hole (511); The tooth embryo (43) is fixed to the side of the docking component (3) and is engaged in the circular hole (511) through the limiting rod (64). The milling component (2) moves to perform a tooth groove processing on the tooth embryo (43). At the same time, the limiting rod (64) is pushed out of a circular hole (511) by the milling component (2). At this time, the movable ring (51) rotates the limiting rod (64) to engage in the next circular hole (511).

2. The tooth profile positioning milling device for low-precision gear production according to claim 1, characterized in that: The transmission assembly (5) further comprises a guide groove formed in the circular hole (511); a blocking block (513) is provided in a movable sleeve inside the circular hole (511); and the blocking block (513) slides in the guide groove; A third magnet (515) is fixedly mounted at one end of the guide groove, and the blocking block (513) is located at one end of the guide groove under the action of the third magnet (515).

3. The tooth profile positioning milling device for low-precision gear production according to claim 2, characterized in that: A groove (514) is provided on the top of the blocking block (513), and a ring array of bayonet pins (518) is provided on the movable ring (51). The number of the bayonet pins (518) is the same as the number of the circular holes (511), and one end of the bayonet pins (518) is located in the circular hole (511).

4. The tooth profile positioning milling device for low-precision gear production according to claim 3, characterized in that: The milling assembly (2) comprises a milling cutter (22) mounted on the top of the base (1), and a transmission rod (21) is fixedly mounted on the milling cutter (22); The transmission rod (21) is coaxial with the blocking block (513) and the limiting rod (64); The transmission rod (21) moves toward the tooth embryo (43), and the transmission rod (21) pushes the blocking block (513) to move along the circular hole (511). At the same time, the blocking block (513) pushes the limiting rod (64) to disengage from a circular hole (511). At this time, the blocking block (513) is located at one end of the circular hole (511), and the latch (518) is engaged in the groove (514), so that the side of the blocking block (513) and one end of the circular hole (511) maintain a plane.

5. The tooth profile positioning milling device for low-precision gear production according to claim 4, characterized in that: A transmission ring (519) is provided on the side movable sleeve of the movable ring (51), and a spring sheet (517) is fixedly mounted on the outer annular array of the transmission ring (519), the spring sheet (517) is in contact with the top of the latch (518), and a reset spring sheet (516) is provided between the transmission ring (519) and the movable ring (51).

6. The tooth profile positioning milling device for low-precision gear production according to claim 4, characterized in that: The docking assembly (3) comprises a first fixing frame (31) fixedly mounted on the top of the base (1), a docking ring (33) being movably mounted in the middle of the first fixing frame (31), and a guide frame (30) being fixedly mounted on the side of the docking ring (33); A docking frame (53) is fixedly mounted on the side of the movable ring (51), and the docking frame (53) is engaged with the outside of the guide frame (30) and fixedly connected to the guide frame (30) via a threaded rod (52); The first fixing frame (31) is provided with a rectangular through slot (32), and the transmission rod (21) moves through the rectangular through slot (32) and enters the circular hole (511).

7. The tooth profile positioning milling device for low-precision gear production according to claim 6, characterized in that: The limiting assembly (6) further comprises a U-shaped frame (611) fixed to the top of the C-shaped frame (61), both ends of the U-shaped frame (611) are threadedly sleeved with screw rods (612), and the ends of the screw rods (612) are movably mounted with balls (613).

8. The tooth profile positioning milling device for low-precision gear production according to claim 1, characterized in that: The clamping assembly (4) comprises a second fixing frame (41) fixedly mounted on the side of the docking ring (33), a support rod (42) being threadedly sleeved on the second fixing frame (41), and a resistance block (44) being movably mounted on one end of the support rod (42).

9. The tooth profile positioning milling device for low-precision gear production according to claim 6, characterized in that: The docking assembly (3) further comprises a first support frame (35) arranged in an annular array outside the docking ring (33), a first magnet (36) being fixedly mounted on a side of the first support frame (35), a second support frame (38) being fixedly mounted on a side of the first fixing frame (31), a second magnet (37) being fixedly mounted on a side of the second support frame (38), and a protective cover (34) being fixedly mounted on a side of the first fixing frame (31) and being sleeved on the second support frame (38) and the outside of the docking ring (33); The opposing surfaces of the second magnet (37) and the first magnet (36) are magnetic poles of the same polarity, and the inclination directions of the second magnet (37) and the first magnet (36) are consistent.

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