High-flexibility automatic bolt gluing and tightening equipment for toothed bolt

Abstract

The invention discloses high-flexibility automatic bolt gluing and tightening equipment for a driven tooth bolt, which comprises a vibration tray mechanism, an automatic feeding mechanism, an automatic gluing mechanism, a visual error-proofing mechanism, an automatic tightening mechanism, an automatic material taking mechanism and a workpiece rotating mechanism which are arranged on a rack, the vibrating tray mechanism is used for placing a toothed bolt and conveying the toothed bolt to a starting point of the automatic feeding mechanism, the automatic gluing mechanism and the visual mistake proofing mechanism are sequentially arranged between the starting point and an end point of the automatic feeding mechanism, and the automatic material taking mechanism is arranged at the end point of the automatic feeding mechanism. The automatic material taking mechanism is used for taking out the toothed bolt from the automatic feeding mechanism and conveying the toothed bolt to the automatic tightening mechanism. Automatic assembly and detection in the whole bolt gluing and tightening process are achieved, and the failure risk caused by manual operation is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing and manufacturing, in particular to a highly flexible automatic bolt gluing and tightening device for toothed bolts. Background Art

[0002] At present, whether it is a fuel car or an electric car, during its driving process, the car power is transmitted to the main reducer through the engine or electric motor, and then transmitted to the wheels at both ends through the speed reduction and torque increase of the reducer to drive the wheels to rotate. In this process, the last set of large teeth fixed on the differential bears the maximum torque. At present, the mainstream way of assembling the differential and the large teeth is bolt connection. In order to prevent the bolts from loosening during long-term high-load operation (the number of connecting bolts ranges from 6 to 14), all the connecting bolts must be coated with anti-loosening anaerobic glue. At present, the bolts are manually held by hand to immerse the threads in the anaerobic glue solution for glue application → the bolts are manually held with an air gun to pre-install the bolts into the connecting threaded holes of the differential and the large teeth → the "differential / teeth / bolt assembly" is manually transferred to a tightening machine with a tightening shaft for bolt torque setting.

[0003] Most of the actions of the existing technical solutions are manually operated, which is too subjectively dependent on people and is very likely to fail due to fatigue. The main defects are as follows: 1. Manual operation during the gluing and pre-installation process cannot prevent errors, and it is easy to miss the glue; 2. Manual material collection cannot prevent errors in bolts of different lengths, and it is easy to use the wrong bolts; 3. The method of manually holding the bolts for glue soaking cannot achieve quantitative glue application, and excessive or insufficient glue application often occurs; 4. Anaerobic glue drips everywhere during the manual operation process. For the above problems, the first two failure modes will cause functional failures of the product, such as bolts falling off and causing abnormal noises; serious safety accidents may even occur, such as the jamming of the reducer assembly causing the vehicle to be unable to drive.

[0004] The information disclosed in the above background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] In view of the above-mentioned existing defects, the purpose of the present invention is to provide a highly flexible automatic bolt gluing and tightening equipment for toothed bolts, which can realize automatic assembly and detection of the whole process of bolt gluing and tightening, and avoid the failure risk caused by human operation.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A highly flexible automatic bolt gluing and tightening device for toothed bolts, comprising a vibrating tray mechanism, an automatic feeding mechanism, an automatic gluing mechanism, a visual error prevention mechanism, an automatic tightening mechanism, an automatic material picking mechanism and a workpiece rotating mechanism arranged on a frame, wherein the workpiece rotating mechanism is used to place the teeth of a differential belt, the vibrating tray mechanism is used to place the toothed bolts and transport the toothed bolts to the starting point of the automatic feeding mechanism, the automatic gluing mechanism and the visual error prevention mechanism are arranged in sequence between the starting point and the end point of the automatic feeding mechanism, the automatic material picking mechanism is arranged at the end point of the automatic feeding mechanism, the automatic material picking mechanism is used to take the toothed bolts from the automatic feeding mechanism and send them to the automatic tightening mechanism, the automatic tightening mechanism and the workpiece rotating mechanism are arranged opposite to each other, so that the automatic tightening mechanism can tighten the toothed bolts onto the teeth of the differential.

[0008] Furthermore, the vibrating material tray mechanism includes a material tray, a frequency conversion motor connected to the material tray, and a feeding cylinder and a guide groove arranged on the material tray. The frequency conversion motor drives the material tray to vibrate, so that the bolts are rearranged and raised to the bolt guide groove, and then transported to the discharge port by the bolt guide groove. An in-position sensor and a feeding cylinder are arranged at the discharge port. The in-position sensor detects whether the bolts are in place, and the bolts are then transported to the automatic feeding mechanism by the feeding cylinder.

[0009] Furthermore, the automatic feeding mechanism comprises a servo displacement mechanism and a turntable driven by the servo displacement mechanism.

[0010] Furthermore, bolt grooves of different specifications ranging from M6 to M14 are arranged on the edge of the turntable.

[0011] Furthermore, a total of 8 docking stations, including a nailing station, a gluing station, a detection station, a sorting station, 2 nailing stations, and 2 waiting stations, are evenly arranged counterclockwise around the turntable, and the servo position shifting mechanism drives the turntable at 45° per step.

[0012] Furthermore, it also includes a nail taking station, which is connected to the nail taking station through a buffer silo.

[0013] Furthermore, the automatic gluing mechanism includes a bolt clamp, a glue gun, upper and lower clamping cylinders, a precision electronic pressure regulating valve, a bolt rotation servo motor and a glue gun lifting servo motor. The two ends of the bolt clamp are connected to the upper and lower clamping cylinders, and the bolt centering clamping is achieved by the upper and lower clamping cylinders. The bolt rotation servo motor is arranged beside the bolt clamp, and the rotation of the bolt clamp is driven by the bolt rotation synchronous belt. The glue gun is also arranged beside the bolt clamp, and the glue gun is driven to be automatically transported and fed up and down by the glue gun lifting servo motor. A precision electronic pressure regulating valve is arranged between the glue gun and the glue bin to achieve precise control of the amount of anaerobic glue output, and the bolt is fixed and rotated at a uniform speed by the bolt rotation servo motor, and the glue needle is automatically transported and fed up and down by the glue gun lifting servo motor. The linkage of bolt rotation and up and down feeding is achieved by the PLC master control system, so as to achieve gluing of the thread according to the bolt specifications.

[0014] Furthermore, the visual error-proofing mechanism includes a bolt clamp, an intelligent camera, upper and lower clamping cylinders and a bolt rotation servo motor. The two ends of the bolt clamp are connected to the upper and lower clamping cylinders, and the bolt centering clamping is achieved by the upper and lower clamping cylinders. The bolt rotation servo motor is arranged next to the bolt clamp, and the rotation of the bolt clamp is driven by the bolt rotation synchronous belt. The intelligent camera is also arranged next to the bolt clamp. After the intelligent camera takes 360° photos of several screw threads at fixed positions on the bolt, it identifies the color difference between "with glue" and "without glue" through the internal built-in processor to verify whether the gluing quality of each screw thread is qualified, and feeds back the inspection results to the PLC. For some workpieces where the color difference between "with glue" and "without glue" is not obvious, the intelligent camera can also call the self-learning function of the internal processor to compare with the historical defect mode to double check whether the gluing quality is qualified. In addition, the intelligence can also calculate the length and thread diameter of the bolt according to the shape of the bolt, thereby eliminating the risk of using the wrong bolt.

[0015] Furthermore, the automatic material-retrieving mechanism includes a self-centering jaw, a jaw centering cylinder, a jaw lifting cylinder, a bolt feeding cylinder, a center distance adjustment servo device and a center distance adjustment reverse screw pair. The self-centering jaw is connected to the center distance adjustment reverse screw pair through the jaw centering cylinder and the jaw lifting cylinder in turn. The center distance adjustment servo device is arranged on one side of the center distance adjustment reverse screw pair. The bolt feeding cylinder is arranged beside the self-centering jaw and connected to the nail-retrieving station of the automatic feeding mechanism. The material-retrieving and tightening position conversion is realized by moving the jaw lifting cylinder and the jaw centering cylinder, and the compatibility of bolts with different pitch circles is realized by the center distance adjustment servo device. The jaws of the automatic material-retrieving mechanism are docked with the automatic tightening mechanism; the center distance adjustment servo device is used to drive the screw to rotate. When the reverse screw rotates, the nut pairs installed at both ends can lead the corresponding slides to move left and right, thereby realizing the synchronous adjustment of the left / right center distance.

[0016] Furthermore, the automatic tightening mechanism includes a tightening shaft, a lifting servo module, a tightening servo motor, a reducer mechanism, a torque sensor, a displacement sensor, a bolt adapter, a center distance adjustment servo motor, a center moment adjustment reverse screw, a tightening adapter and a workpiece clamping mechanism, wherein the tightening shaft is connected to the input shaft through the tightening adapter, and the input shaft is respectively connected to the tightening servo motor and the lifting servo module through the torque sensor and the displacement sensor, and the input shaft is also arranged on the center moment adjustment reverse screw, and a center distance adjustment servo motor is arranged on one side of the center moment adjustment reverse screw. The tightening shaft is driven by the tightening servo motor and the lifting servo module to realize the diagonal tightening of the bolt, and the compatibility of bolts with different pitch circles is realized by the center distance adjustment servo motor; the torque sensor is used to monitor the reverse torque of the bolt in the servo tightening process in real time, and the displacement sensor is used to detect the screw-in amount of the bolt during the tightening process, and the tightening is stopped when the set target is reached.

[0017] Furthermore, the workpiece rotating mechanism includes a workpiece rotating servo motor, a gear reducer, a self-centering clamp and a centering cylinder, wherein the self-centering clamp is arranged above the centering cylinder, which is arranged above the gear reducer, and the workpiece rotating servo motor is connected to the gear reducer in a rotational transmission manner. The workpiece rotating servo motor is used to realize the rotation of the workpiece at a fixed angle, and the pneumatic clamp is used to realize the compatibility of workpieces with different outer diameters.

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

[0019] The vibration plate feeding of the present invention cooperates with the multi-station servo displacement mechanism to be compatible with different specifications of screws when feeding, and does not require tooling switching; the non-contact displacement sensor cooperates with the visual system to realize error-proof verification of bolt lengths and diameters of different specifications; the precision glue supply pump is equipped with a servo module and a servo displacement mechanism to realize fully automatic switching compatibility of gluing with different bolt pitches; the intelligent camera cooperates with the servo displacement mechanism to realize 360° anti-leakage glue verification; the tightening devices arranged symmetrically on the left and right cooperate with the servo displacement mechanism to realize fully automatic diagonal tightening of all bolts; two tightening motors cooperate with the center distance servo adjustment device to realize fully automatic switching compatibility of bolts with different pitch circles. The use of highly flexible automatic bolt gluing and tightening equipment for toothed bolts eliminates various potential failure risks in the process of manual gluing and pre-installation, improves the first-time pass rate and product reliability, and reduces the labor intensity of employees and saves labor costs: 1. The same equipment can be compatible with automatic gluing and tightening of toothed bolts of different specifications from M6 to M14 and different numbers of 6 to 18 bolts; 2. 100% error prevention of defects such as missing glue, discontinuous glue application, and wrong use of screws; 3. 100% monitoring and tracing of gluing effect, tightening angle and displacement; 4. 40 sets of 12 bolt type products can be automatically glued and tightened per hour. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The following is a schematic diagram of the process of realizing the product of the present invention;

[0021] Figure 2 The overall structure diagram of the device of the present invention is as follows;

[0022] Figure 3 The vibrating tray mechanism diagram of the present invention is as follows;

[0023] Figure 4 The bolt delivery mechanism diagram of the present invention is as follows;

[0024] Figure 5 The following is a diagram of the thread glue coating mechanism of the present invention;

[0025] Figure 6 The following is a diagram of the glue quantity verification mechanism of the present invention;

[0026] Figure 7 The bolt picking mechanism diagram of the present invention is as follows;

[0027] Figure 8 The bolt pre-tightening mechanism diagram of the present invention is as follows;

[0028] Fig. 9 The following is a diagram of the assembly rotary mechanism of the present invention;

[0029] Fig.10 The following is a framework diagram of the PLC master control system of the present invention;

[0030] Fig.11 The following is the operation logic diagram of the PLC master control system of the present invention;

[0031] In the figure, 1-vibrating tray mechanism; 2-automatic feeding mechanism; 3-automatic gluing mechanism; 4-visual error prevention mechanism; 5-automatic tightening mechanism; 6-automatic material taking mechanism; 7-workpiece rotating mechanism; 8-differential belt teeth; 9-toothed bolts; 101-tray; 102-frequency conversion motor; 103-feeding cylinder; 104-guide groove; 105-in-place sensor; 201-servo displacement mechanism; 202-turntable; 203- Bolt slot; 204-nail loading station; 205-glue coating station; 206-inspection station; 207-sorting station; 208-nail removal station; 209-waiting station; 210-nail removal station; 211-buffer silo; 301-first bolt fixture; 302-glue gun; 303-first upper and lower clamping cylinders; 304-precision electronic pressure regulating valve; 305-first bolt rotation servo motor; 306-glue gun lifting servo motor ;401-second bolt fixture;402-intelligent camera;403-second upper and lower clamping cylinder;404-second bolt rotation servo motor;601-first self-centering clamp;602-clamp centering cylinder;603-clamp lifting cylinder;604-bolt feeding cylinder;605-first center distance adjustment servo device;606-first center distance adjustment reverse screw pair;501-tightening shaft;502-lifting servo module;503-tightening servo motor;504-reducer mechanism;505-torque sensor;506-displacement sensor;507-bolt adapter;508-second center distance adjustment servo motor;509-second center moment adjustment reverse screw;510-tightening adapter;511-workpiece clamping mechanism;701-workpiece rotation servo motor;702-gear reducer,703-second self-centering clamp;704-centering cylinder DETAILED DESCRIPTION

[0032] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the embodiments and accompanying drawings. In the description of this embodiment, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0033] like Figure 2As shown, a highly flexible automatic bolt gluing and tightening device for toothed bolts comprises a vibrating tray mechanism 1, an automatic feeding mechanism 2, an automatic gluing mechanism 3, a visual error prevention mechanism 4, an automatic tightening mechanism 5, an automatic material picking mechanism 6 and a workpiece rotating mechanism 7 arranged on a frame, wherein the workpiece rotating mechanism 7 is used to place the teeth of the differential belt, the vibrating tray mechanism 1 is used to place the toothed bolts 9, and transport the toothed bolts 9 to the starting point of the automatic feeding mechanism 2, and the automatic gluing mechanism 3 and the visual error prevention mechanism 4 are arranged in sequence between the starting point and the end point of the automatic feeding mechanism 2, and the automatic material picking mechanism 2 is arranged at the end point of the automatic feeding mechanism, and the automatic material picking mechanism 2 is used to take the toothed bolts 9 from the automatic feeding mechanism 2 and send them to the automatic tightening mechanism 6, and the automatic tightening mechanism 6 is arranged opposite to the workpiece rotating mechanism 7, so that the automatic tightening mechanism 6 can tighten the toothed bolts onto the teeth of the differential. Figure 1 shown.

[0034] In this embodiment, the vibrating tray mechanism 1, such as Figure 3 As shown, it includes a material tray 101, a variable frequency motor 102 connected to the material tray, a feeding cylinder 103 and a guide groove 104 arranged on the material tray 1, and the variable frequency motor 102 drives the material tray 101 to vibrate, so that the bolts are rearranged and raised to the bolt guide groove 104, and then transported to the discharge port by the bolt guide groove 104, and an in-position sensor 105 and a feeding cylinder are arranged at the discharge port. The in-position sensor 105 detects whether the bolts are in place, and the bolts are then transported to the automatic feeding mechanism 2 by the feeding cylinder 103.

[0035] In this embodiment, if Figure 4 As shown, the automatic feeding mechanism 2 includes a servo displacement mechanism 201 and a turntable 202 driven by the servo displacement mechanism 201.

[0036] In this embodiment, if Figure 4 As shown, bolt grooves 203 of different specifications ranging from M6 to M14 are arranged on the edge of the turntable 202 .

[0037] In this embodiment, if Figure 4 As shown, a nailing station 204, a gluing station 205, a detection station 206, a sorting station 207, a nailing station 208×2, and a waiting station 209×2, totaling 8 docking stations, are evenly arranged in a counterclockwise direction around the turntable 202, and the servo displacement mechanism 201 drives the turntable at 45° per step.

[0038] In this embodiment, if Figure 4 As shown, it also includes a nail removal station 210, and the nail removal station 210 is connected to the nail removal station 208 through a buffer bin 211.

[0039] In this embodiment, if Figure 5As shown, the automatic glue coating mechanism 3 includes a first bolt fixture 301, a glue gun 302, a first upper and lower pressing cylinders 303, a precision electronic pressure regulating valve 304, a bolt rotation servo motor 305 and a glue gun lifting servo motor 306. The two ends of the first bolt fixture 301 are connected to the upper and lower pressing cylinders 303, and the bolt centering clamping is achieved through the upper and lower pressing cylinders 303. The bolt rotation servo motor 305 is arranged beside the first bolt fixture 301, and the rotation of the first bolt fixture 301 is driven by the bolt rotation synchronous belt. The glue gun 3 02 is also arranged beside the first bolt fixture 301, and the glue gun 302 is driven by the glue gun lifting servo motor 302 to automatically transport and feed up and down. A precision electronic pressure regulating valve 304 is arranged between the glue gun 302 and the glue bin to realize the precise control of the output of anaerobic glue, and the bolt is fixed and rotated at a uniform speed by the bolt rotation servo motor 305, and the glue gun 302 is automatically transported and fed up and down by the glue gun lifting servo motor 306. The bolt rotation and up and down feeding are linked by the PLC master control system to achieve gluing of the thread according to the bolt specifications.

[0040] In this embodiment, if Figure 6 As shown, the visual error-proofing mechanism 4 includes a second bolt fixture 401, a smart camera 402, a second upper and lower clamping cylinder 403 and a second bolt rotation servo motor 404. The two ends of the second bolt fixture 401 are connected to the second upper and lower clamping cylinders 403, and the bolt centering clamping is achieved by the second upper and lower clamping cylinders 403. The second bolt rotation servo motor 404 is arranged beside the second bolt fixture 401, and the second bolt fixture 401 is driven to rotate by the bolt rotation synchronous belt. The smart camera 402 is also arranged beside the second bolt fixture 401. 2. After taking 360° photos of several screw threads at fixed positions on the bolts, the internal processor is used to identify the color difference between "with glue" and "without glue" to verify whether the gluing quality of each screw thread is qualified, and the test results are fed back to the PLC master control system. For some workpieces where the color difference between "with glue" and "without glue" is not obvious, the smart camera 402 can also call the self-learning function of the internal processor to compare with the historical defect mode to double check whether the gluing quality is qualified. In addition, the smart camera 402 can also calculate the length and thread diameter of the bolt according to the shape of the bolt, thereby eliminating the risk of using the wrong bolt.

[0041] In this embodiment, if Figure 7As shown, the automatic material removal mechanism 6 includes a first self-centering jaw 601, a jaw centering cylinder 602, a jaw lifting cylinder 603, a bolt feeding cylinder 604, a first center distance adjustment servo device 605 and a first center distance adjustment reverse screw pair 606. The first self-centering jaw 601 is connected to the first center distance adjustment reverse screw pair 606 through the jaw centering cylinder 602 and the jaw lifting cylinder 603 in sequence. The first center distance adjustment servo device 605 is arranged on one side of the first center distance adjustment reverse screw pair 606, and the bolt feeding cylinder 604 is arranged next to the first self-centering jaw 601 and connected to the nail removal station 210 of the automatic feeding mechanism 2. The material picking and tightening position conversion is realized by moving the jaw lifting cylinder 603 and the jaw centering cylinder 602, and the compatibility of bolts with different pitch circles is realized by the first center distance adjustment servo device 605. The jaws of the automatic material picking mechanism 6 are connected with the automatic tightening mechanism 7; the first center distance adjustment servo device 605 is used to drive the lead screw to rotate, and when the lead screw rotates in the opposite direction, the nut pairs installed at both ends can drive the corresponding slides to move left and right, thereby realizing the synchronous adjustment of the left / right center distance.

[0042] In this embodiment, if Figure 8 As shown, the automatic tightening mechanism 5 includes a tightening shaft 501, a lifting servo module 502, a tightening servo motor 503, a reducer mechanism 504, a torque sensor 505, a displacement sensor 506, a bolt adapter 507, a second center distance adjustment servo motor 508, a second center moment adjustment reverse screw rod 509, a tightening adapter 510 and a workpiece clamping mechanism 511. The tightening shaft 501 is connected to the input shaft through the tightening adapter 510. The input shaft is respectively connected to the tightening servo motor 503 and the lifting servo module 502 through the torque sensor 505 and the displacement sensor 506. The input shaft is also arranged on the second center moment adjustment reverse screw rod 509, and the second center distance adjustment servo motor 508 is arranged on one side of the second center moment adjustment reverse screw rod 509. The tightening servo motor 503 and the lifting servo module 502 drive the tightening shaft 501 to achieve diagonal tightening of the bolt, and the second center distance adjustment servo motor 508 is used to achieve compatibility with bolts of different pitch circles; the torque sensor 505 is used to monitor in real time the reverse torque of the bolt during the servo tightening process, and the displacement sensor 506 is used to detect the amount of bolt screwed in during the tightening process, and the tightening is stopped when the set target is reached.

[0043] In this embodiment, if Fig. 9As shown, the workpiece rotating mechanism 7 includes a workpiece rotating servo motor 701, a gear reducer 702, a second self-centering clamp 703 and a centering cylinder 704. The second self-centering clamp 703 is arranged above the centering cylinder 704, and the centering cylinder 704 is arranged above the gear reducer 702. The workpiece rotating servo motor 701 is connected to the gear reducer 702 in a rotational transmission. The workpiece is rotated at a fixed angle by the workpiece rotating servo motor 701, and the compatibility of workpieces with different outer diameters is achieved by the pneumatic clamp.

[0044] In this embodiment, the control framework of the PLC master control system is as follows: Fig.10 As shown, an HMI human-machine interface is provided, which is respectively connected to the variable frequency motor, position sensor and feeding cylinder of the automatic feeding mechanism; the servo displacement mechanism of the automatic feeding mechanism; the glue gun, upper and lower clamping cylinders, precision electronic pressure regulating valve, bolt rotation servo motor and glue gun lifting servo motor of the automatic gluing mechanism; the intelligent camera, upper and lower clamping cylinders and bolt rotation servo motor of the visual error prevention mechanism; the clamping jaw centering cylinder, clamping jaw lifting cylinder, bolt feeding cylinder and center distance adjustment servo device of the automatic material picking mechanism; the automatic tightening mechanism and lifting servo module, tightening servo motor, torque sensor, displacement sensor, and center distance adjustment servo motor; the workpiece rotation servo motor and centering cylinder of the workpiece rotation mechanism. The specific control logic of PLC is as follows: Fig.11 As shown, no further details are given here.

[0045] The specific operation process of the present invention is as follows:

[0046] The vibrating tray mechanism 1 rearranges the disordered bolts through vibration and bolt shape characteristics and raises them to the discharge port. The one-time bolt filling capacity is ≥1000. The vibrating tray is already a mature product in the industry. By improving its bolt guide groove, it can achieve compatibility with bolts of different specifications.

[0047] The automatic feeding mechanism 2 drives the bolt turntable to rotate according to the set angle through the plane servo displacement device to achieve the functional requirements of nailing, gluing, testing, sorting, nailing × 2, waiting × 2, a total of 8 stations docking, among which the nailing station is docked with the vibration tray mechanism 1, the gluing station is docked with the thread gluing mechanism 3, the testing station is connected with the glue quantity verification mechanism 4, the sorting station is connected with the unqualified product rejection mechanism, the nailing station is docked with the buffer silo, and the nailing station is docked with the bolt picking mechanism 3; the corresponding function slots are evenly distributed on the bolt turntable according to the number of stations (360° / 8=4 5° / slot position), slots with different hole diameters and equal spacing are processed at one time according to the bolt specifications (a total of 5 types of bolts from M6 to M12, 45° / 5=9° / hole spacing), so as to achieve compatibility of bolts of different specifications on the same tooling plate, and the slot switching of different products is realized through the servo displacement mechanism, that is, the corresponding initial angles of bolt slots of different specifications are input into the PLC program to achieve compatibility without changing the turntable tooling; the servo displacement mechanism is directly connected to the center axis of the turntable through the planetary reduction mechanism and the servo motor, so that the angular control accuracy of the turntable can reach 0.01°.

[0048] The automatic gluing mechanism 3 realizes bolt centering clamping through upper and lower clamping cylinders, realizes precise control of the amount of anaerobic glue output through a precise electronic pressure regulating valve, realizes bolt fixed and uniform rotation through a bolt rotating device, realizes automatic up and down transportation and feeding of the glue needle through a servo lifting mechanism, and realizes the linkage of bolt rotation and up and down feeding through a control program, so as to achieve the function of gluing the thread according to the bolt specifications and ensure that each thread can be evenly glued. For example, you only need to input the bolt specification M14×1.5 to realize that the glue gun automatically moves 1.5mm for every 1 turn of the bolt, thereby achieving compatibility with bolts of different pitches; a displacement sensor is designed on the lower clamping cylinder mounting seat to prevent errors in bolt length.

[0049] By adopting the highly flexible automatic bolt gluing and tightening equipment for toothed bolts of the present invention, various potential failure risks in the process of manual gluing and pre-installation are eliminated, the first-time offline qualified rate and product reliability are improved, and the labor intensity of employees is reduced and the labor cost is saved: 1. The same equipment can be compatible with automatic gluing and tightening of toothed bolts of different specifications from M6 to M14 and different numbers of 6 to 18 bolts; 2. 100% error prevention of defects such as missing glue, discontinuous glue coating, and wrong use of screws is achieved; 3. 100% monitoring and tracing of gluing effect, tightening angle and displacement are achieved; 4. 40 sets of 12-bolt type products can be automatically glued and tightened per hour.

[0050] Although the present invention has been described in detail above with specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A highly flexible automatic bolt gluing and tightening device for toothed bolts, characterized by: It includes a vibrating tray mechanism, an automatic feeding mechanism, an automatic gluing mechanism, a visual error-proofing mechanism, an automatic tightening mechanism, an automatic material picking mechanism and a workpiece rotating mechanism arranged on a frame. The workpiece rotating mechanism is used to place the teeth of the differential belt. The vibrating tray mechanism is used to place the toothed bolts and transport the toothed bolts to the starting point of the automatic feeding mechanism. Between the starting point and the end point of the automatic feeding mechanism, the automatic gluing mechanism and the visual error-proofing mechanism are successively arranged. The automatic material picking mechanism is arranged at the end point of the automatic feeding mechanism. The automatic material picking mechanism is used to take the toothed bolts from the automatic feeding mechanism and send them to the automatic tightening mechanism. The automatic tightening mechanism is arranged opposite to the workpiece rotating mechanism, so that the automatic tightening mechanism can tighten the toothed bolts onto the teeth of the differential.

2. According to claim 1, a highly flexible automatic bolt gluing and tightening device for toothed bolts is characterized by: The vibrating tray mechanism includes a tray, a variable frequency motor connected to the tray, a feeding cylinder and a guide groove arranged on the tray. The variable frequency motor drives the tray to vibrate, so that the bolts are rearranged and raised to the bolt guide groove, and then transported to the discharge port by the bolt guide groove. An in-position sensor and a feeding cylinder are arranged at the discharge port. The in-position sensor detects whether the bolts are in place, and the bolts are then transported to the automatic feeding mechanism by the feeding cylinder.

3. According to claim 1, a highly flexible automatic bolt gluing and tightening device for toothed bolts is characterized by: The automatic feeding mechanism comprises a servo displacement mechanism and a turntable driven by the servo displacement mechanism.

4. According to claim 3, a highly flexible automatic bolt gluing and tightening device for toothed bolts is characterized by: Bolt grooves of different specifications, M6 to M14, are arranged on the edge of the turntable.

5. According to claim 3, a highly flexible automatic bolt gluing and tightening device for toothed bolts is characterized by: A total of 8 docking stations, including a nailing station, a gluing station, a testing station, a sorting station, 2 nailing stations, and 2 waiting stations, are evenly arranged around the turntable in a counterclockwise direction, and the servo position shifting mechanism drives the turntable at 45° per step.

6. The highly flexible automatic bolt gluing and tightening device for toothed bolts according to claim 5 is characterized by: It also includes a nail taking station, which is connected to the nail taking station through a buffer silo.

7. According to claim 1, a highly flexible automatic bolt gluing and tightening device for toothed bolts is characterized by: The automatic gluing mechanism includes a bolt clamp, a glue gun, upper and lower clamping cylinders, a precision electronic pressure regulating valve, a bolt rotation servo motor and a glue gun lifting servo motor. The two ends of the bolt clamp are connected to the upper and lower clamping cylinders, and the bolt centering clamping is achieved by the upper and lower clamping cylinders. The bolt rotation servo motor is arranged beside the bolt clamp, and the bolt clamp is driven to rotate by the bolt rotation synchronous belt. The glue gun is also arranged beside the bolt clamp, and the glue gun is driven to be automatically transported and fed up and down by the glue gun lifting servo motor. A precision electronic pressure regulating valve is arranged between the glue gun and the glue bin to achieve precise control of the glue output of the anaerobic glue, and the bolt is fixed and rotated at a uniform speed by the bolt rotation servo motor, and the glue needle is automatically transported and fed up and down by the glue gun lifting servo motor.

8. The highly flexible automatic bolt gluing and tightening device for toothed bolts according to claim 1 is characterized by: The visual error-proofing mechanism includes a bolt clamp, an intelligent camera, upper and lower clamping cylinders and a bolt rotation servo motor. The two ends of the bolt clamp are connected to the upper and lower clamping cylinders, and the bolt centering clamping is achieved by the upper and lower clamping cylinders. The bolt rotation servo motor is arranged next to the bolt clamp, and the rotation of the bolt clamp is driven by the bolt rotation synchronous belt. The intelligent camera is also arranged next to the bolt clamp.

9. The highly flexible automatic bolt gluing and tightening device for toothed bolts according to claim 6 is characterized by: The automatic material taking mechanism comprises a self-centering jaw, a jaw centering cylinder, a jaw lifting cylinder, a bolt feeding cylinder, a center distance adjustment servo device and a center distance adjustment reverse screw pair. The self-centering jaw is connected to the center distance adjustment reverse screw pair through the jaw centering cylinder and the jaw lifting cylinder in sequence. The center distance adjustment servo device is arranged on one side of the center distance adjustment reverse screw pair. The bolt feeding cylinder is arranged beside the self-centering jaw and connected to the nail taking station of the automatic feeding mechanism.

10. The highly flexible automatic bolt gluing and tightening device for toothed bolts according to claim 1 is characterized by: The automatic tightening mechanism includes a tightening shaft, a lifting servo module, a tightening servo motor, a reducer mechanism, a torque sensor, a displacement sensor, a bolt adapter, a center distance adjustment servo motor, a center moment adjustment reverse screw rod, a tightening adapter and a workpiece clamping mechanism. The tightening shaft is connected to the input shaft through the tightening adapter, and the input shaft is respectively connected to the tightening servo motor and the lifting servo module through the torque sensor and the displacement sensor. The input shaft is also arranged on the center moment adjustment reverse screw rod, and a center distance adjustment servo motor is arranged on one side of the center moment adjustment reverse screw rod.

11. The highly flexible automatic bolt gluing and tightening device for toothed bolts according to claim 1 is characterized by: The workpiece rotating mechanism comprises a workpiece rotating servo motor, a gear reducer, a self-centering clamp and a centering cylinder. The self-centering clamp is arranged above the centering cylinder, and the centering cylinder is arranged above the gear reducer. The workpiece rotating servo motor is connected to the gear reducer in a rotational transmission manner.

Images