Engine flywheel housing bolt automatic tightening system with mistake-proofing recognition function

Abstract

The invention discloses an automatic engine flywheel housing bolt tightening system with an error-proofing recognition function, belongs to the technical field of engine assembly, and solves the technical problem that traditional production line tooling equipment cannot adapt to tightening of various flywheel housing bolts. The system comprises an engine conveying line, the engine conveying line is provided with a tray and a flywheel shell bolt tightening station, the flywheel shell bolt tightening station is provided with a robot, a controller and a displayer, the execution end of the robot is provided with a tightening device, the tightening device comprises an electric control tightening wrench, and the electric control tightening wrench is provided with a tightening sleeve. The controller is electrically connected with the robot, the display and the electric control tightening wrench, and the controller is in communication connection with an equipment control system of the engine conveying line; the controller controls the robot to drive the electric control tightening wrench to tighten the flywheel housing bolt, and state parameters in the tightening process are monitored in real time; if the state parameters are satisfied, displaying qualification; otherwise, displaying disqualification. And the device can be suitable for tightening various flywheel housing bolts and mistake-proofing identification.

Description

Technical Field

[0001] The invention relates to the technical field of engine assembly, and more particularly to an automatic tightening system for engine flywheel housing bolts with an error-proofing identification function. Background Art

[0002] With the upgrade of engine emissions, changes in user and market diversification, in order to meet the diverse market demands, the traditional automobile industry has a one-way linear relationship from supply chain companies, vehicle manufacturers to users, and vehicle manufacturers are mostly centered on their own products. In the new automobile ecosystem, the status of users will be greatly improved, and vehicle manufacturers will shift from "product-centered" to "user-centered". The different usage scenarios of vehicles in the hands of users lead to different functions of the whole vehicle, so vehicle manufacturers need to design different car chassis with more powerful engines to meet market demand.

[0003] In order to meet the diverse vehicle structures, the engine needs to be equipped with corresponding structures. During the engine production and assembly process, the original production line tooling equipment is only suitable for some old structures. However, with the continuous replacement of products, changes in structure, and the continuous enrichment of models, the structural appearance of the flywheel housing of different series of models is different, and the cylinder blocks used are also different, resulting in differences in the position, number, bolt specifications, and stop size of the flywheel housing bolts.

[0004] Differences in machine structure will lead to differences in assembly process and assembly tooling, which will not meet production needs. How to meet the goal of mixed-line compatible production of multiple types of machine models, improve the compatibility and interchangeability of production lines, and ensure efficiency and quality at the same time, brings great challenges to the design and selection of process equipment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art, and an object of the present invention is to provide an automatic tightening system for engine flywheel housing bolts with an error-proofing identification function.

[0006] The technical solution of the present invention is: an automatic tightening system for engine flywheel housing bolts with an error-proofing identification function, comprising an engine conveyor line, the engine conveyor line is provided with a pallet for transporting engines, the engine conveyor line is provided with a flywheel housing bolt tightening station, the flywheel housing bolt tightening station is provided with a robot, a controller, and a display, the execution end of the robot is provided with a tightening device, the tightening device comprises an electric control tightening wrench, the electric control tightening wrench is provided with a tightening sleeve for tightening the flywheel housing bolts, the controller is electrically connected to the robot, the display, and the electric control tightening wrench, and the controller is communicatively connected to the equipment control system of the engine conveyor line;

[0007] When the pallet transports the engine to the flywheel housing bolt tightening station, the controller controls the robot to move the electric-controlled tightening wrench to the flywheel housing of the engine according to the set trajectory. At the same time, the controller controls the electric-controlled tightening wrench to tighten the flywheel housing bolts. The controller monitors the state parameters of the tightening process of the electric-controlled tightening wrench in real time; when the state parameters meet the process requirements, the display shows that the flywheel housing bolts are tightened properly; otherwise, the display shows that the flywheel housing bolts are tightened unqualified.

[0008] As a further improvement, the flywheel housing bolt tightening station is provided with a robot base for installing the robot, and the robot base is installed on the ground by anchor bolts.

[0009] Furthermore, the tightening device also includes a mounting plate, the top of the mounting plate is provided with a connecting plate for connecting to the execution end of the robot, and two electric-controlled tightening wrenches are installed at the bottom of the mounting plate, one of the electric-controlled tightening wrenches is fixedly mounted on one side of the mounting plate, and the other electric-controlled tightening wrench is movably mounted on the other side of the mounting plate through a moving mechanism, and the moving mechanism is electrically connected to the controller, and the distance between the two electric-controlled tightening wrenches can be adjusted through the moving mechanism.

[0010] Furthermore, the moving mechanism is any one of an IAI servo electric cylinder, an electric push rod, a servo air cylinder, a servo oil cylinder, and a screw module.

[0011] Furthermore, the flywheel housing bolt tightening station is provided with a quick-change sleeve device, the quick-change sleeve device is located within the working range of the robot, and the quick-change sleeve device is provided with tightening sleeves of at least two specifications.

[0012] Furthermore, the display shows a picture of the flywheel housing structure, and the installation position of each flywheel housing bolt is shown on the picture.

[0013] Furthermore, when the flywheel housing bolts are tightened properly, the installation position of the flywheel housing bolts is displayed in green; when the flywheel housing bolts are tightened unqualified, the installation position of the flywheel housing bolts is displayed in red.

[0014] Furthermore, the flywheel housing bolt tightening station is provided with an alarm device electrically connected to the controller, and when the flywheel housing bolts are not tightened properly, an alarm is sounded through the alarm device.

[0015] Furthermore, the state parameters include screw-in depth and tightening torque. The screw-in depth and tightening torque are qualified only when they meet the process requirements at the same time, otherwise they are unqualified.

[0016] Furthermore, the engine conveyor line at the flywheel housing bolt tightening station is provided with a pallet positioning device; and the robot is a 6-joint industrial robot.

[0017] Beneficial Effects

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

[0019] 1. The present invention can be compatible with ≥2 types of engine flywheel housing bolts for automatic tightening.

[0020] 2. The tightening device of the present invention can replace the sleeve through a quick-change sleeve device, which can meet the switching of 4 (M12 / M14 / M16 / M18) sleeves of different specifications.

[0021] 3. The controller of the present invention is connected to the equipment control system of the production line through an IT data interface model; the tightening results are displayed through pictures for on-site operation stations to view; qualified tightening results are displayed in green, and unqualified results are displayed in red, achieving fool-proofing and error-proofing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0023] Figure 2 It is a right view structural schematic diagram of the present invention;

[0024] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the tightening device in the present invention.

[0026] Figure 5 It is a picture display diagram of the tightening result in the present invention.

[0027] Among them: 1-engine conveyor line, 2-engine, 3-pallet, 4-flywheel housing bolt tightening station, 5-robot, 6-controller, 7-display, 8-electrically controlled tightening wrench, 9-tightening sleeve, 10-robot base, 11-anchor fixing bolt, 12-mounting plate, 13-connecting plate, 14-moving mechanism, 15-quick-change sleeve device, 16-installation position, 17-alarm, 18-pallet positioning device. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0029] See also Figure 1 to Figure 5, an automatic tightening system for engine flywheel housing bolts with error-proofing recognition function, comprising an engine conveyor line 1, the engine conveyor line 1 is provided with a pallet 3 for transporting an engine 2. The engine conveyor line 1 is provided with a flywheel housing bolt tightening station 4, the flywheel housing bolt tightening station 4 is provided with a robot 5, a controller 6, and a display 7. The execution end of the robot 5 is provided with a tightening device, the tightening device includes an electric control tightening wrench 8, and the electric control tightening wrench 8 is provided with a tightening sleeve 9 for tightening the flywheel housing bolts. The controller 6 is electrically connected to the robot 5, the display 7, and the electric control tightening wrench 8, and the controller 6 is communicatively connected to the equipment control system of the engine conveyor line 1.

[0030] When the pallet 3 transports the engine 2 to the flywheel housing bolt tightening station 4, the controller 6 controls the robot 5 to move the electric controlled tightening wrench 8 to the flywheel housing of the engine 2 according to the set trajectory. At the same time, the controller 6 controls the electric controlled tightening wrench 8 to tighten the flywheel housing bolts. The controller 6 monitors the state parameters of the tightening process of the electric controlled tightening wrench 8 in real time; when the state parameters meet the process requirements, the display 7 displays that the flywheel housing bolts are tightened qualified; otherwise, the display 7 displays that the flywheel housing bolts are tightened unqualified.

[0031] In this embodiment, the state parameters include screw-in depth and tightening torque, that is, the screw-in depth fed back by the robot 5 and the tightening torque fed back by the electric control tightening wrench 8 are judged. It is qualified only when the screw-in depth and the tightening torque meet the process requirements at the same time, otherwise it is unqualified.

[0032] By displaying a picture of the flywheel housing structure on the display 7, and displaying the installation position 16 of each flywheel housing bolt on the picture. When the flywheel housing bolt is tightened properly, the installation position 16 of the flywheel housing bolt is displayed in green; when the flywheel housing bolt is tightened unqualified, the installation position 16 of the flywheel housing bolt is displayed in red, such as Figure 5 The tightening results are displayed to the on-site operating station through pictures, which is simple and intuitive; qualified tightening results are displayed in green, and unqualified results are displayed in red, which can prevent mistakes.

[0033] Specifically, the flywheel housing bolt tightening station 4 is provided with a robot base 10 for installing the robot 5 , and the robot base 10 is installed on the ground through anchor bolts 11 .

[0034] The tightening device also includes a mounting plate 12, a connecting plate 13 for connecting the execution end of the robot 5 is provided on the top of the mounting plate 12, and two electric control tightening wrenches 8 are installed at the bottom of the mounting plate 12, one of which is fixedly mounted on one side of the mounting plate 12, and the other is movably mounted on the other side of the mounting plate 12 through a moving mechanism 14, and the moving mechanism 14 is electrically connected to the controller 6, and the distance between the two electric control tightening wrenches 8 can be adjusted through the moving mechanism 14. It can be realized that one wrench or two wrenches can be moved to the working space position to meet the changes in the tightening positions of different flywheel housing bolts, and it can be realized that two flywheel housing bolts can be tightened at the same time, thereby improving work efficiency.

[0035] The moving mechanism 14 is any one of IAI servo electric cylinder, electric push rod, servo air cylinder, servo oil cylinder, and screw module (i.e., a mechanism in which a motor drives a screw to rotate, and a screw drives a nut to reciprocate, similar to the X / Y axis on a machine tool).

[0036] The flywheel housing bolt tightening station 4 is provided with a quick-change sleeve device 15, which is located within the working range of the robot 5. The quick-change sleeve device 15 is provided with tightening sleeves 9 of at least two specifications, such as tightening sleeves of M12 / M14 / M16 / M18 specifications. The quick-change sleeve device 15 adopts a sleeve device of the prior art.

[0037] Further, the flywheel housing bolt tightening station 4 is provided with an alarm 17 electrically connected to the controller 6. When the flywheel housing bolt is not tightened properly, an alarm is sounded through the alarm 17. In this embodiment, the alarm 17 is a three-color alarm light with a buzzer, which can promptly notify the staff to handle it.

[0038] The engine conveyor line 1 at the flywheel housing bolt tightening station 4 is provided with a pallet positioning device 18. When the pallet 3 transports the engine 2 to the flywheel housing bolt tightening station 4, the engine 2 is positioned by the pallet positioning device 18. The pallet positioning device 18 adopts the pallet positioning device of the original production line, which belongs to the prior art.

[0039] Robot 5 is a 6-joint industrial robot with flexible working and can adapt to tightening various flywheel housing bolts.

[0040] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An automatic tightening system for engine flywheel housing bolts with an error-proofing recognition function, comprising an engine conveyor line (1), wherein the engine conveyor line (1) is provided with a tray (3) for transporting engines (2), characterized in that: The engine conveyor line (1) is provided with a flywheel housing bolt tightening station (4), the flywheel housing bolt tightening station (4) is provided with a robot (5), a controller (6), and a display (7), the execution end of the robot (5) is provided with a tightening device, the tightening device comprises an electric control tightening wrench (8), the electric control tightening wrench (8) is provided with a tightening sleeve (9) for tightening the flywheel housing bolts, the controller (6) is electrically connected to the robot (5), the display (7), and the electric control tightening wrench (8), and the controller (6) is communicatively connected to the equipment control system of the engine conveyor line (1); When the tray (3) transports the engine (2) to the flywheel housing bolt tightening station (4), the controller (6) controls the robot (5) to move the electric control tightening wrench (8) to the flywheel housing of the engine (2) according to the set trajectory. At the same time, the controller (6) controls the electric control tightening wrench (8) to tighten the flywheel housing bolts. The controller (6) monitors the state parameters of the tightening process of the electric control tightening wrench (8) in real time. When the state parameters meet the process requirements, the display (7) displays that the flywheel housing bolts are tightened properly; otherwise, the display (7) displays that the flywheel housing bolts are tightened unqualified.

2. The engine flywheel housing bolt automatic tightening system with error-proofing recognition function according to claim 1 is characterized in that: The flywheel housing bolt tightening station (4) is provided with a robot base (10) for installing the robot (5), and the robot base (10) is installed on the ground via anchor bolts (11).

3. The engine flywheel housing bolt automatic tightening system with error-proofing recognition function according to claim 1 is characterized in that: The tightening device also includes a mounting plate (12), the top of which is provided with a connecting plate (13) for connecting to the execution end of the robot (5), and the bottom of the mounting plate (12) is provided with two electric-controlled tightening wrenches (8), one of which is fixedly mounted on one side of the mounting plate (12), and the other electric-controlled tightening wrench (8) is movably mounted on the other side of the mounting plate (12) via a moving mechanism (14), and the moving mechanism (14) is electrically connected to the controller (6), and the distance between the two electric-controlled tightening wrenches (8) can be adjusted via the moving mechanism (14).

4. The engine flywheel housing bolt automatic tightening system with error-proofing recognition function according to claim 3 is characterized in that: The moving mechanism (14) is any one of an IAI servo electric cylinder, an electric push rod, a servo air cylinder, a servo oil cylinder, and a screw module.

5. The engine flywheel housing bolt automatic tightening system with error-proofing recognition function according to claim 1, characterized in that: The flywheel housing bolt tightening station (4) is provided with a quick-change sleeve device (15), the quick-change sleeve device (15) is located within the working range of the robot (5), and the quick-change sleeve device (15) is provided with tightening sleeves (9) of at least two specifications.

6. The engine flywheel housing bolt automatic tightening system with error-proofing recognition function according to claim 1, characterized in that: The display (7) displays a picture of the flywheel housing structure, and the installation position (16) of each flywheel housing bolt is displayed on the picture.

7. The engine flywheel housing bolt automatic tightening system with error-proofing recognition function according to claim 6, characterized in that: When the flywheel housing bolts are tightened properly, the installation position (16) of the flywheel housing bolts is displayed in green; when the flywheel housing bolts are tightened unqualified, the installation position (16) of the flywheel housing bolts is displayed in red.

8. The engine flywheel housing bolt automatic tightening system with error-proofing recognition function according to claim 1, characterized in that: The flywheel housing bolt tightening station (4) is provided with an alarm (17) electrically connected to the controller (6), and when the flywheel housing bolts are not tightened properly, an alarm is sounded through the alarm (17).

9. The engine flywheel housing bolt automatic tightening system with error-proofing recognition function according to claim 1, characterized in that: The state parameters include screw-in depth and tightening torque. The screw-in depth and tightening torque are qualified only when they meet the process requirements at the same time, otherwise they are unqualified.

10. The engine flywheel housing bolt automatic tightening system with error-proofing recognition function according to claim 1, characterized in that: The engine conveyor line (1) at the flywheel housing bolt tightening station (4) is provided with a pallet positioning device (18); the robot (5) is a 6-joint industrial robot.

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