Gear production line

Abstract

The utility model discloses a gear production line which comprises a feeding bin, a first lathe, a second lathe, a marking machine, a conveying frame, a feeding mechanism, an overturning cleaning mechanism, a first driving assembly and a second driving assembly. The machining device further comprises a first transfer mechanism, a drilling machine, a second transfer mechanism, a first mechanical arm, a machining center, a second mechanical arm and a discharging bin. Through the first transfer mechanism and the second transfer mechanism, blanks can flow more smoothly in the whole production line, normal operation of the whole production line is ensured, the production speed is further increased, and the flow stability of the production line is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear processing and manufacturing, in particular to a gear production line. Background Art

[0002] A gear is a mechanical component with teeth on the rim that can continuously mesh to transmit motion and power. In the production process of gears, gears need to go through multiple processing steps such as turning, milling, and hobbing, and the same gear needs to be processed on a variety of machine tools.

[0003] In the prior art, generally after the gears are processed on a machine tool, the workers move them to other machine tools for further processing. This production method increases the manual workload, reduces production efficiency, and is not conducive to mass production.

[0004] After searching, the existing application number is CN202311587519.X, and the patent name is an invention patent for a gear production line, which solves the above-mentioned technical problems. However, the patent does not set up a transfer mechanism between adjacent processes, but only sets up a transfer mechanism after the processing is completed, which causes a certain impact on the smoothness of the operation of the entire production line; specifically, after the turning is completed, it is immediately transported to the next process of milling production through the feeding mechanism, but in actual conditions, there is a time deviation between the turning processing time and the milling processing time, and there is a time deviation between the milling process and the gear hobbing process. If the time of the previous process is longer than that of the subsequent process, there is no problem in directly carrying out the subsequent process after the previous process is completed. When the processing time of the subsequent process is longer than that of the previous process, the semi-finished product after the previous process is completed cannot be transferred, thereby affecting the processing speed of the previous process, affecting the processing speed of the entire production line, and affecting the smoothness of the production line operation.

[0005] Therefore, in order to further improve the processing speed and improve the smoothness of the production line operation, the utility model proposes a gear production line. Utility Model Content

[0006] The utility model aims to provide a gear production line to solve the problem that the existing gear production line in the background technology has no transfer mechanism between adjacent processing steps, which affects the overall processing speed and the smoothness of the production line operation.

[0007] In order to achieve the above-mentioned purpose, the utility model proposes a gear production line, including a loading bin for storing blanks, a first lathe and a second lathe for processing the blanks, a marking machine for marking the blanks, a conveyor frame arranged above the lathe along the distribution path of the loading bin, the first lathe, the second lathe and the marking machine, two feeding mechanisms movably mounted on the conveyor frame for clamping the blanks, a flipping and cleaning mechanism mounted on the conveyor frame and located between the first lathe and the second lathe, a first driving assembly for driving the feeding mechanism to move along the conveyor frame, a driving assembly for driving the feeding mechanism to move in a direction close to / away from the lathe, and a driving assembly for driving the feeding mechanism to move the blanks A second drive assembly for placing in / out of a machine tool or a flip cleaning mechanism; wherein, it also includes a first transfer mechanism located at the end of a conveyor frame and arranged perpendicularly to the conveyor frame, for receiving and conveying blanks; a drilling machine for drilling holes in the blanks; a second transfer mechanism for storing the drilled blanks; a first robotic arm for transferring the blanks on the first transfer mechanism between the drilling machine and the second transfer mechanism; a gear hobbing machine for hobbing the blanks, and a machining center for chamfering the teeth of gears; a second robotic arm for transferring the blanks between the second transfer mechanism, the gear hobbing machine and the machining center; and a discharge bin for storing the finished rough-machined gears.

[0008] Optionally, the first transfer mechanism includes a first transfer frame, a rodless cylinder installed on the first transfer frame, a placement structure installed on the rodless cylinder, and two groups of limiting structures installed on the top of the first transfer frame and respectively located on both ends of the rodless cylinder.

[0009] Optionally, the placement structure includes a chassis mounted on the rodless cylinder and a limiting platform mounted on the chassis.

[0010] Optionally, the limiting structure includes a first infrared receiver and a first infrared transmitter installed on a first transfer rack, and a straight line formed by the installation positions of the first infrared receiver and the first infrared transmitter in the same group is perpendicular to the moving direction of the placement structure.

[0011] Optionally, the second transfer mechanism includes an annular chain conveyor, a plurality of transfer seats installed on the annular chain conveyor, and a blank taking confirmation structure, a blank absence confirmation structure and a blank presence confirmation structure installed on the annular chain conveyor.

[0012] Optionally, the blank retrieval confirmation structure and the blank absence confirmation structure are located on the same side of the circular chain conveyor, the blank retrieval confirmation structure and the blank presence confirmation structure are located on one end of the circular chain conveyor close to the second robotic arm, and the blank absence confirmation structure is located on one end of the circular chain conveyor close to the first robotic arm; when the same transfer seat moves on the circular chain conveyor, it first passes through the blank presence confirmation structure and then passes through the blank retrieval confirmation structure.

[0013] Optionally, the blank removal confirmation structure, the blank absence confirmation structure and the blank presence confirmation structure all include two L-shaped support plates, a guide shaft support installed on the L-shaped support plate, a mounting rod installed on the guide shaft support, a mounting block installed on the mounting rod, and a second infrared transmitter and a second infrared receiver installed on the mounting block.

[0014] Optionally, the two L-shaped support plates are respectively installed on the inner and outer sides of the ring of the ring chain conveyor; the straight line formed by the installation position of the second infrared transmitter and the installation position of the second infrared receiver forms an acute angle with the movement trajectory of the transfer seat.

[0015] Optionally, a stop structure for limiting the position of the central transfer seat is installed on the side wall of the ring chain conveyor, and the number of the stop structures is two, which are respectively located beside the blank taking confirmation structure and the blank absence confirmation structure.

[0016] Optionally, the stop structure includes a worm gear reducer mounted on the ring chain conveyor, a micro motor mounted on the input shaft of the worm gear reducer, and a stop block mounted on the output end of the worm gear reducer.

[0017] Optionally, each of the transfer seats includes two connecting bases installed on the ring chain conveyor, connecting plates installed on the two connecting bases, a first limiting circular plate installed on the connecting plates, and a second limiting circular plate installed on the first limiting circular plate, wherein the diameter of the second limiting circular plate is smaller than the diameter of the first limiting circular plate; and a mating groove corresponding to the stop block is provided on the connecting base.

[0018] Compared with the prior art, the utility model provides a gear production line, which has the following beneficial effects:

[0019] The gear production line of the present invention can automatically transfer the blanks between various machine tools, realize the automation of gear processing, eliminate manual transfer work, and improve the gear processing efficiency.

[0020] The present invention arranges the first transfer mechanism and the second transfer mechanism between adjacent processing steps for temporarily storing the blanks, thereby avoiding the situation that after the front-end process is completed, the back-end process cannot be loaded, which affects the normal operation of the front-end process, ensures that the semi-finished products completed in the front-end process can be transferred to the next process, ensures the normal operation of the entire production line, and makes the flow of blanks in the entire production line smoother. When all the blanks in the loading bin are loaded, the back-end process proceeds normally and the front-end process stops. After the loading bin is replenished, the front-end process is started again, thereby ensuring the normal operation of the entire production line, further improving the production speed, and improving the flow stability of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the gear production line of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the first transfer mechanism of the utility model.

[0023] Figure 3 It is a structural schematic diagram of the second transfer mechanism of the utility model.

[0024] Figure 4 It is a structural schematic diagram of the transfer seat in the utility model.

[0025] Figure 5 It is a structural schematic diagram of the transfer seat in the utility model from another perspective.

[0026] Figure 6 It is a schematic diagram of a blank taking confirmation structure, a blank absence confirmation structure and a blank presence confirmation structure in the second transfer mechanism of the utility model.

[0027] Figure 7 It is a schematic diagram of the stop structure of the utility model.

[0028] Markings in the figure: 1. Loading bin; 2. First lathe; 3. Second lathe; 4. Marking machine; 5. Conveyor rack; 6. Feeding mechanism; 7. Turning and cleaning mechanism; 8. First transfer mechanism; 81. First transfer rack; 82. Rodless cylinder; 83. Placement structure; 831. Chassis; 832. Limiting table; 84. Limiting structure; 841. First infrared receiver; 842. First infrared transmitter; 9. Drilling machine; 10. Second transfer mechanism; 101. Ring chain conveyor; 101a. Stop structure; 101b. Worm gear reducer; 101c. Micro motor; 101d , stop block; 102, transfer seat; 102a, connecting base; 102b, connecting plate; 102c, first limiting circular plate; 102d, second limiting circular plate; 102e, matching groove; 103, blank removal confirmation structure; 104, blank absence confirmation structure; 105, blank presence confirmation structure; 106, L-shaped support plate; 107, guide shaft support; 108, mounting rod; 109, mounting block; 109a, second infrared transmitter; 109b, second infrared receiver; 11, first robotic arm; 12, gear hobbing machine; 13, machining center; 14, second robotic arm; 15, discharge bin. DETAILED DESCRIPTION

[0029] The following is a detailed description in conjunction with the accompanying drawings and specific implementations. In the following description, many specific details are set forth to facilitate a full understanding of the present utility. However, the present utility can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present utility, so the present utility is not limited by the specific embodiments disclosed below.

[0030] A gear production line of the present application can be applicable to occasions such as gear processing, and of course can also be used in other similar application scenarios. A gear production line is described in detail below.

[0031] See attached Figure 1 — Figure 7 As shown, a schematic diagram of the structure of a preferred embodiment of a gear production line of the present application is shown. The gear production line includes a loading bin 1 for storing blanks, a first lathe 2 and a second lathe 3 for processing blanks, a marking machine 4 for marking the blanks, a conveyor frame 5 arranged above the lathe along the distribution path of the loading bin 1, the first lathe 2, the second lathe 3 and the marking machine 4, two feeding mechanisms 6 for clamping the blanks movably mounted on the conveyor frame 5, a flipping and cleaning mechanism 7 installed on the conveyor frame 5 and located between the first lathe 2 and the second lathe 3, a first driving assembly for driving the feeding mechanism 6 to move along the conveyor frame 5, a driving assembly for driving the feeding mechanism 6 to move in a direction close to / away from the lathe, and a flipping and cleaning mechanism 7 for driving the feeding mechanism 6 to put the blanks into / out of the lathe or flip cleaning mechanism 7. The second driving component in the structure 7; wherein, it also includes a first transfer mechanism 8 located at the end of the conveyor frame 5 and arranged perpendicular to the conveyor frame 5, for receiving and conveying the blank; a drilling machine 9 for drilling holes in the blank; a second transfer mechanism 10 for storing the drilled blank; a first robotic arm 11 for transferring the blank on the first transfer mechanism 8 between the drilling machine 9 and the second transfer mechanism 10; a gear hobbing machine 12 for hobbing the blank, and a machining center 13 for chamfering the teeth of the gear; a second robotic arm 14 for transferring the blank between the second transfer mechanism 10, the gear hobbing machine 12 and the machining center 13; and a discharge bin 15 for storing the finished rough-machined gear.

[0032] The utility model temporarily stores the gear blanks after the turning process by setting the first transfer mechanism 8, and facilitates the first robot arm 11 to pick up the blanks, thereby increasing the speed of the first robot arm 11 picking up the blanks and increasing the processing speed of the entire production line; through the setting of the second robot arm 14, the blanks that have been drilled are temporarily stored to ensure the normal progress of the front-end drilling process. It should be specially noted that in this application, the loading bin 1, the first lathe 2, the second lathe 3, the conveyor frame 5, the feeding mechanism 6, the flipping and cleaning mechanism 7, the first robot arm 11 and the second robot arm 14 have all been disclosed in the invention patent with application number CN202311587519.X and patent name "A Gear Production Line", while the marking machine 4, the gear hobbing machine 12 and the machining center 13 are prior art and will not be repeated here.

[0033] See attached Figure 1 and Figure 2As shown, in the utility model, the first transfer mechanism 8 includes a first transfer frame 81, a rodless cylinder 82 installed on the first transfer frame 81, a placement structure 83 installed on the rodless cylinder 82, and two groups of limiting structures 84 installed on the top of the first transfer frame 81 and respectively located on both ends of the rodless cylinder 82.

[0034] The utility model uses the rodless cylinder 82 as a power source to drive the blank to move so that the blank enters the picking range of the robot arm; the placement structure 83 is used to limit the placement of the blank to ensure that the blank will not fall during the movement, and the first robot arm 11 can pick it up; the limiting structure 84 is used to sense the moving position of the blank on the rodless cylinder 82, and can sense whether there is a blank on the rodless cylinder 82, providing signals for the movement of the rodless cylinder 82 and the picking up of the first robot arm 11.

[0035] See attached Figure 2 As shown, in the utility model, the placement structure 83 includes a chassis 831 installed on the rodless cylinder 82, and a limiting platform 832 installed on the chassis 831; the limiting structure 84 includes a first infrared receiver 841 and a first infrared transmitter 842 installed on the first transfer rack 81, and the straight line formed by the installation positions of the first infrared receiver 841 and the first infrared receiver 841 in the same group is perpendicular to the moving direction of the placement structure 83.

[0036] The utility model provides an installation position for the limit platform 832 through the setting of the chassis 831; the setting of the limit platform 832 is used to limit the blank to ensure that the rodless cylinder 82 can drive the blank to move; the setting of the first infrared transmitter 842 and the first infrared receiver 841 is used to sense and limit the position of the blank on the rodless cylinder 82, that is, when the front-end process is completed and the feeding mechanism 6 places the blank on the limit platform 832, the infrared rays emitted by the first infrared transmitter 842 will be blocked, and the corresponding first infrared receiver 841 will send a signal to indicate that the blank is installed in place, and then the external PLC controller controls the rodless cylinder 82 to move until the infrared rays emitted by the first infrared transmitter 842 at the other end of the rodless cylinder 82 are blocked. At this time, the PLC controller receives a signal from another first infrared receiver 841, and controls the first mechanical arm 11 to pick up the blank. After picking up, the first infrared receiver 841 senses the signal of the first infrared transmitter 842 again, and the PLC controller resets the rodless cylinder 82.

[0037] See attached Figure 1 , Figure 3 — Figure 7As shown, in the utility model, the second transfer mechanism 10 includes an annular chain conveyor 101, a plurality of transfer seats 102 installed on the annular chain conveyor 101, a blank taking confirmation structure 103, a blank absence confirmation structure 104 and a blank presence confirmation structure 105 installed on the annular chain conveyor 101.

[0038] The utility model limits the moving track of the transfer seat 102 to a ring shape by setting the ring chain conveyor 101, so that multiple transfer seats 102 can be moved without collision or interference due to reciprocating motion; the transfer seat 102 is used to place blanks, drive the blanks to move, and prevent the blanks from falling during the movement; the blank-taking confirmation structure 103 is set to monitor whether the second robot arm 14 takes the blanks on the transfer seat 102; specifically, when the second robot arm 14 needs to take the blanks, ... The recognition structure 103 will first detect the presence of a blank on the corresponding transfer seat 102. Then, after the second robot arm 14 completes taking the blank, the blank taking confirmation structure 103 cannot sense the blank on the corresponding transfer seat 102, thereby determining that the second robot arm 14 has completed taking the blank; through the setting of the blank-free confirmation structure 104, when the first robot arm 11 is about to place the blank, it can sense whether there is a blank on the transfer seat 102 at the placement position; through the setting of the blank confirmation structure 105, the stop structure 101a corresponding to the subsequent blank taking confirmation structure 103 is reminded.

[0039] See attached Figure 3 — Figure 7 As shown, in the utility model, the blank taking confirmation structure 103 and the blank absence confirmation structure 104 are located on the same side of the circular chain conveyor 101, the blank taking confirmation structure 103 and the blank presence confirmation structure 105 are located on the end of the circular chain conveyor 101 close to the second robotic arm, and the blank absence confirmation structure 104 is located on the end of the circular chain conveyor 101 close to the first robotic arm 11; when the same transfer seat 102 moves on the circular chain conveyor 101, it first passes through the blank presence confirmation structure 105 and then passes through the blank taking confirmation structure 103.

[0040] The utility model arranges the blank taking confirmation structure 103 and the blank absence confirmation structure 104 on the same side of the circular chain conveyor 101, and determines the spacing between the blank taking confirmation structure 103 and the blank absence confirmation structure 104, which is convenient for the subsequent determination of the position of the intermediate transfer seat 102 that is not placed; by arranging the blank presence confirmation structure 105 and the blank taking confirmation structure 103 on the same end of the circular chain conveyor 101, the distance between the two structures is reduced, ensuring that the distance between the two structures allows the placement of a intermediate transfer seat 102, which is convenient for the subsequent determination of the blank taking position.

[0041] See attached Figure 3 — Figure 7 As shown, in the utility model, the blank removal confirmation structure 103, the blank absence confirmation structure 104 and the blank presence confirmation structure 105 all include two L-shaped support plates 106, a guide shaft support 107 installed on the L-shaped support plate 106, a mounting rod 108 installed on the guide shaft support 107, a mounting block 109 installed on the mounting rod 108, and a second infrared transmitter 109a and a second infrared receiver 109b installed on the mounting block 109.

[0042] The utility model provides an installation position for the guide shaft support 107 through the arrangement of the L-shaped support plate 106, thereby ensuring that the second infrared transmitter 109a and the second infrared receiver 109b can be installed; through the arrangement of the guide shaft support 107, the mounting block 109 on the mounting rod 108 can be rotated, which is convenient for the installation of the second infrared transmitter 109a and the second infrared receiver 109b, that is, after the second infrared transmitter 109a and the second infrared receiver 109b are installed, the mounting rod 108 can be rotated to adjust the positions of the second infrared transmitter 109a and the second infrared receiver 109b, and after the adjustment is completed, they can be locked by bolts.

[0043] See attached Figure 3 — Figure 7 As shown, in the utility model, two L-shaped support plates 106 are respectively installed on the inner and outer sides of the ring of the ring chain conveyor 101; the straight line formed by the installation position of the second infrared transmitter 109a and the installation position of the second infrared receiver 109b forms an acute angle with the movement trajectory of the transfer seat 102.

[0044] The utility model avoids the installation position of the stop structure 101a by limiting the installation positions of the second infrared transmitter 109a and the second infrared receiver 109b, and expands the monitoring range and improves the monitoring accuracy.

[0045] See attached Figure 3 and Figure 7 As shown, in the utility model, the stop structure 101a includes a worm gear reducer 101b installed on the ring chain conveyor 101, a micro motor 101c installed on the input shaft of the worm gear reducer 101b, and a stop block 101d installed on the output end of the worm gear reducer 101b; each transfer seat 102 includes two connecting bases 102a installed on the ring chain conveyor 101, a connecting plate 102b installed on the two connecting bases 102a, a first limiting circular plate 102c installed on the connecting plate 102b, and a second limiting circular plate 102d installed on the first limiting circular plate 102c, and the diameter of the second limiting circular plate 102d is smaller than the diameter of the first limiting circular plate 102c; a matching groove 102e corresponding to the stop block 101d is provided on the connecting base 102a.

[0046] The utility model reduces speed and converts the output of the micro motor 101c by setting a worm gear reduction box 101b, so that the micro motor 101c can drive the stop block 101d to move; the stop block 101d is set to stop the transfer seat 102, and a proximity switch can be set on the stop block 101d to confirm whether the stop block is in contact with the transfer seat 102; the utility model limits the blank by setting a first limiting circular plate 102c and a second limiting circular plate 102d to prevent the blank from moving during the movement; the matching groove 102e is set to correspond to the stop block 101d and can be used to limit the transfer seat 102; wherein the micro motor 101c can be a stepping motor.

[0047] See attached Figure 1 — Figure 7 As shown, the use process of the utility model is as follows:

[0048] In the first step, the blank in the upper bin 1 is taken out by the first drive assembly and the second drive assembly in cooperation with the feeding mechanism 6, and then the first drive assembly and the second drive assembly cooperate with the feeding mechanism 6 to take out the processed blank in the first lathe 2, and put the blank taken out from the upper bin 1 into the first lathe 2;

[0049] In the second step, the blank removed from the first lathe 2 is placed into the turning and cleaning mechanism 7 through the first driving assembly and the second driving assembly in cooperation with the feeding mechanism 6;

[0050] In the third step, another driving and feeding mechanism 6 is used to cooperate with the first driving assembly and the second driving assembly corresponding to the driving and feeding mechanism 6 to take out the blank that has been turned over and cleaned in the turning and cleaning mechanism 7, move it to the second lathe 3, take out the blank that has been processed in the second lathe 3, put the blank taken out from the turning and cleaning mechanism 7 into it, then leave the second lathe 3 and move to the marking machine 4, take out the blank that has been marked, then put in the blank taken out from the second lathe 3, then leave the marking machine 4, and put the blank that has been marked onto the first transfer mechanism 8;

[0051] Step 4: The blank blocks one of the first infrared transmitters 842. When the first infrared receiver 841 corresponding to the first infrared transmitter 842 fails to receive a signal, the first infrared receiver 841 sends a signal to an external PLC controller, and the PLC controller controls the rodless cylinder 82 to move until the other first infrared transmitter 842 is blocked.

[0052] Step 5: The first robot arm 11 takes down the blank on the placement structure 83. After taking it down, the PLC controller receives the signal of the first infrared receiver 841 that was originally blocked by the blank, and then controls the rodless cylinder 82 to reset. The first robot arm 11 takes down the blank drilled on the drilling machine 9, puts in the blank taken down from the placement structure 83, and then places the blank taken down from the drilling machine 9 onto the second transfer mechanism 10.

[0053] In the sixth step, the second robot arm 14 takes the blank from the second transfer mechanism 10 and moves it, first takes out the blank that has been hobbed on the gear hobbing machine 12, then puts in a new blank, drives the blank that has been hobbed to move to the machining center 13, takes out the blank that has been chamfered by the machining center 13, puts in a new blank, and puts the blank that has been chamfered into the discharge bin 15;

[0054] It should be noted that the present application only adds a first transfer mechanism 8 and a second transfer mechanism 10 to the existing production line;

[0055] The process of the second transfer mechanism 10 when it is running is as follows:

[0056] During the operation of the ring chain conveyor 101, when the first robot arm 11 sends out a discharge signal, the external PLC controller first reads the signal of the second infrared receiver 109b at the blank confirmation structure 103 after receiving the signal. When it is read that the second infrared receiver 109b receives the corresponding signal of the second infrared transmitter 109a within the specified time range, it indicates that there is no blank placed on the transfer seat 102. Then the PLC controller starts timing. Since the distance from the transfer seat 102 from the blank confirmation structure 103 to the blank-free confirmation structure 104 is fixed, and the running speed of the ring chain conveyor 101 is fixed, the transfer seat 102 is moved. The time of the movement is fixed. After the specified time, the PLC controller controls the stop structure 101a located on the side of the blank-free confirmation structure 104 to start working, that is, the micro motor 101c rotates a specified angle, and the stop block 101d is driven to rotate through the worm gear reducer 101b to limit the position of the corresponding transfer seat 102, and the blank-free confirmation structure 104 is used to confirm whether there is a blank on the corresponding transfer seat 102 again. When it is confirmed that there is no blank, the PLC controller controls the first robot arm 11 to place the blank; it should be particularly noted that the first robot arm can send a discharge signal after taking the blank from the first transfer mechanism 8;

[0057] When the second robot arm 14 sends out a material picking signal, the external PLC controller receives the signal and reads the signal of the second infrared receiver 109b at the blank confirmation structure 105. When one of the transfer seats 102 with the blanks placed thereon moves to that place, the second infrared receiver 109b is blocked. After receiving the blocking signal, the PLC controller controls the stop structure 101a located on the side of the blank picking confirmation structure 103 to start working after a specified time, stops the corresponding transfer seat 102, and confirms the presence of the blank through the blank picking confirmation structure 103. After confirming the presence of the blank, the second robot arm 14 is controlled to pick up the material. After the material picking is completed, the second infrared receiver 109b receives the signal of the corresponding second infrared transmitter 109a again, indicating that the material picking is completed, and the ring chain conveyor 101 starts to operate again.

[0058] The above embodiments are descriptions of the present application, not limitations of the present application. Any solution that is a simple transformation of the present application belongs to the protection scope of the present application.

Claims

1. A gear production line, comprising: a loading bin (1) for storing blanks, a first lathe (2) and a second lathe (3) for processing the blanks, a marking machine (4) for marking the blanks, a conveyor frame (5) arranged above the lathes along a distribution path of the loading bin (1), the first lathe (2), the second lathe (3) and the marking machine (4), two feeding mechanisms (6) movably mounted on the conveyor frame (5) for clamping the blanks, a turning and cleaning mechanism (7) mounted on the conveyor frame (5) and located between the first lathe (2) and the second lathe (3), a first driving component for driving the feeding mechanism (6) to move along the conveyor frame (5), a second driving component for driving the feeding mechanism (6) to move in a direction close to / away from the lathes, and a second driving component for driving the feeding mechanism (6) to put the blank into / out of the machine tool or the turning and cleaning mechanism (7); It is characterized in that It also includes a first transfer mechanism (8) located at the end of the conveying frame (5) and arranged perpendicular to the conveying frame (5) and used for receiving and conveying the blank; A drilling machine (9) for drilling holes in the blank; A second transfer mechanism (10) for storing the drilled blanks; A first mechanical arm (11) for transferring the blank on the first transfer mechanism (8) between the drilling machine (9) and the second transfer mechanism (10); A gear hobbing machine (12) for hobbing a blank, and a machining center (13) for chamfering the teeth of a gear; A second mechanical arm (14) for transferring the blank between the second transfer mechanism (10), the gear hobbing machine (12) and the machining center (13); An outfeed bin (15) is provided for storing the finished rough-machined gears.

2. The gear production line according to claim 1, characterized in that: The first transfer mechanism (8) comprises a first transfer frame (81), a rodless cylinder (82) mounted on the first transfer frame (81), a placement structure (83) mounted on the rodless cylinder (82), and two groups of limit structures (84) mounted on the top of the first transfer frame (81) and respectively located at both ends of the rodless cylinder (82).

3. The gear production line according to claim 2, characterized in that: The placement structure (83) comprises a chassis (831) mounted on the rodless cylinder (82) and a limiting platform (832) mounted on the chassis (831).

4. The gear production line according to claim 2, characterized in that: The limiting structure (84) comprises a first infrared receiver (841) and a first infrared transmitter (842) installed on the first transfer rack (81), and a straight line formed by the installation positions of the first infrared receiver (841) and the first infrared transmitter (842) in the same group is perpendicular to the moving direction of the placement structure (83).

5. The gear production line according to claim 1, characterized in that: The second transfer mechanism (10) comprises an annular chain conveyor (101), a plurality of transfer seats (102) mounted on the annular chain conveyor (101), a blank removal confirmation structure (103), a blank absence confirmation structure (104) and a blank presence confirmation structure (105) mounted on the annular chain conveyor (101).

6. The gear production line according to claim 5, characterized in that: The blank taking confirmation structure (103) and the blank absence confirmation structure (104) are located on the same side of the circular chain conveyor (101); the blank taking confirmation structure (103) and the blank presence confirmation structure (105) are located on one end of the circular chain conveyor (101) close to the second mechanical arm; and the blank absence confirmation structure (104) is located on one end of the circular chain conveyor (101) close to the first mechanical arm (11); when the transfer seat (102) moves on the circular chain conveyor (101), it first passes through the blank presence confirmation structure (105) and then passes through the blank taking confirmation structure (103).

7. The gear production line according to claim 6, characterized in that: The blank removal confirmation structure (103), blank absence confirmation structure (104) and blank presence confirmation structure (105) all comprise two L-shaped support plates (106), a guide shaft support (107) mounted on the L-shaped support plate (106), a mounting rod (108) mounted on the guide shaft support (107), a mounting block (109) mounted on the mounting rod (108), and a second infrared transmitter (109a) and a second infrared receiver (109b) mounted on the mounting block (109).

8. The gear production line according to claim 7, characterized in that: The two L-shaped support plates (106) are respectively installed on the inner and outer sides of the ring of the ring chain conveyor (101); the straight line formed by the installation position of the second infrared transmitter (109a) and the installation position of the second infrared receiver (109b) forms an acute angle with the movement trajectory of the transfer seat (102).

9. The gear production line according to claim 5, characterized in that: A stop structure (101a) for limiting the position of the central transfer seat (102) is installed on the side wall of the ring-shaped chain conveyor (101). There are two stop structures (101a), which are respectively located beside the blank taking confirmation structure (103) and the blank absence confirmation structure (104).

10. The gear production line according to claim 9, characterized in that: The stopping structure (101a) comprises a worm gear reduction box (101b) mounted on the ring-shaped chain conveyor (101), a micro motor (101c) mounted on the input shaft of the worm gear reduction box (101b), and a stopping block (101d) mounted on the output end of the worm gear reduction box (101b); Each of the intermediate transfer seats (102) comprises two connecting bases (102a) mounted on the ring-shaped chain conveyor (101), connecting plates (102b) mounted on the two connecting bases (102a), a first limiting circular plate (102c) mounted on the connecting plates (102b), and a second limiting circular plate (102d) mounted on the first limiting circular plate (102c), wherein the diameter of the second limiting circular plate (102d) is smaller than the diameter of the first limiting circular plate (102c); and a matching groove (102e) corresponding to the stop block (101d) is provided on the connecting base (102a).

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