Automatic numerical control crank press based on visual positioning laser detection and use method of automatic numerical control crank press

Abstract

The invention discloses an automatic numerical control crank press based on visual positioning laser detection and a using method thereof, and mainly relates to the field of presses. Comprising an automatic traveling trolley carrying a single vehicle frame body, a portal frame, a trolley limiting mechanism arranged on the portal frame, servo control units symmetrically arranged on the portal frame, a finished product detection unit and a control system. The servo control unit comprises an x-axis displacement driving mechanism arranged on the portal frame, a y-axis displacement driving mechanism arranged on a sliding block of the x-axis displacement driving mechanism, and an objective table arranged on a sliding block of the y-axis displacement driving mechanism. The press-in device has the beneficial effects that a multi-section intermittent method is adopted for decomposition type press-in, so that the press-in process is more detailed, the original whole-section press-in process is decomposed into multiple sections, when the crank is pressed in different positions, the pressure of the end can be adjusted in real time, the crank is gradually pressed in the middle shaft, the situation that high pressure is used in the whole process to cause overlarge stress is avoided, and the service life of the crank is prolonged. And the risk of workpiece damage or deformation is reduced.

Description

Technical Field

[0001] The present invention relates to the field of presses, in particular to an automatic numerically controlled crank press based on visual positioning laser detection and a use method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] There are many types of bicycles. Regardless of the type, the transmission system is like the heart of the bicycle, the force that drives the bicycle forward. The transmission system includes a bottom bracket mounted on the frame, cranks that are interference-fit with the bottom bracket, wheels, and pedals connected to the cranks. The bottom bracket connects the cranks and wheels to the frame, and these components bear the pedaling force. Therefore, when assembling a bicycle, special attention must be paid to the assembly accuracy of the transmission system. This is because the cranks and the bottom bracket are interference-fitted. External force is used to squeeze the two cranks against the ends of the bottom bracket to form an interference-fit connection. During the assembly process, the coaxiality tolerance between the cranks on both sides and the bottom bracket must be maintained. Otherwise, the rotation angle of the cranks will change during rotation, which will in turn cause the axis position of the pedals to change. The force transmission direction changes during cycling, which not only makes riding more strenuous but also causes damage to the knees. Therefore, the quality of the crank assembly determines the overall quality of the bicycle.

[0004] In the assembly process of the crank and the bottom bracket, the mounting holes between the crank and the bottom bracket are keyway-matched, and precise manual installation is time-consuming and labor-intensive, requiring external force to press the crank into the bottom bracket. The crank component includes mounting holes that match the bottom bracket and connecting holes that connect to the pedals. The mounting holes and connecting holes are located at both ends of the crank, and the two ends of the crank have a height difference and are not flat. Therefore, when the crank is pressed by a press, it is difficult to find a stable and balanced force point. When the crank and the bottom bracket are pressed by a press, if the force is unbalanced, the coaxiality tolerance between the crank and the bottom bracket will exceed the range, causing the rotation angle of the crank to change during rotation, affecting the final quality of the product.

[0005] To address the above-mentioned issues, the applicant has applied for an automatic crank gantry press. The technical solution utilizes a combination of manual and mechanical equipment. The trolley is manually pushed into the operating area, then positioned and fixed, and hydraulic pressure is used to achieve a tight fit on the crank. The following deficiencies were discovered in the actual production process of the above-mentioned equipment, which are intended to be improved: First, regarding the control method, the original product used a hydraulic control method for compaction. Hydraulic control is subject to instability in the oil circuit control, and the accuracy and stroke of the specific pressure value are difficult to control, and can only be maintained within a range of values. Therefore, during the operation, only a unilateral operation method can be used. The left hydraulic cylinder presses against the crank with high pressure, and the right hydraulic cylinder presses in. Then, the right hydraulic cylinder presses against the crank with high pressure, and the left hydraulic cylinder presses in. For this pressing process, it is impossible to adjust the pressure at the end in real time to gradually press the crank into the center shaft. Direct pressing may cause excessive stress on the workpiece, and the risk of damage or deformation of the workpiece. Therefore, this assembly method, accuracy, and efficiency need to be improved.

[0006] After assembly is complete, the product's assembly quality needs to be inspected. Currently, before the trolley is pushed out, the crank is manually rotated and visually inspected to see if the crank's runout around the central axis meets tolerances. This method is inaccurate. The original product's press-in method controlled the crank's insertion by moving a hydraulic cylinder in a single direction. This prevented adjustments to the height and position of the bicycle from changing. Excessive deviations could affect assembly quality during operation, impacting product quality. Therefore, improvements were implemented for these reasons. Summary of the Invention

[0007] The purpose of the present invention is to provide an automatic CNC crank press based on visual positioning laser detection and a method for using the same, which is used for the assembly between a bicycle crank and a bottom bracket. The device has a high degree of intelligence and does not require manual operation, forming a fully automatic unmanned production line. During processing, the servo-controlled pressing heads located on both sides of the gantry use a multi-stage intermittent method to press the crank in, making the pressing process more detailed. The original entire pressing process is decomposed into multiple stages. When pressing the crank at different positions, the pressure of the end head can be adjusted in real time, and the crank is gradually pressed into the bottom bracket to avoid excessive stress caused by the use of high pressure throughout the process, thereby reducing the risk of damage or deformation of the workpiece.

[0008] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: The automatic CNC crank press based on visual positioning laser detection includes an automatic traveling trolley carrying a single-car frame, a gantry, a trolley limiting mechanism arranged on the gantry, a servo control unit symmetrically arranged on the gantry, a finished product detection unit, and a control system; the servo control unit includes an x-axis displacement drive mechanism arranged on the gantry, a y-axis displacement drive mechanism arranged on the sliding block of the x-axis displacement drive mechanism, and a loading platform arranged on the sliding block of the y-axis displacement drive mechanism; the loading platform is provided with a servo control pressure head, a visual capture unit connected to the control system signal, a finished product detection unit, a laser sensor and a measuring Distance sensor; the x- and y-axis displacement drive mechanisms jointly adjust the positions of the components of each unit on the worktable, the visual capture unit transmits the data information of the crank positions on both sides to the control system, and the control system controls the x- and y-axis displacement drive mechanisms to drive the servo-controlled pressure head to move to the workpiece position, and the servo-controlled pressure heads located on both sides of the gantry use a multi-stage intermittent method to press the workpiece when pressing the crank; the finished product detection unit is arranged on the worktable on the flywheel side of the bicycle, the finished product detection unit drives the flywheel of the bicycle to rotate, the distance sensor detects the crank pressing depth, and the laser sensor detects the flywheel runout value.

[0009] The finished product detection unit is connected to an extension cylinder, which drives the finished product detection unit to move; the finished product detection unit includes a rotating motor, a sprocket group connected to the rotating motor shaft, and a rotary cylinder arranged between the sprocket group and the rotating motor; the sprocket group includes an outer shell connected to the rotary cylinder, a driving wheel connected to the driving shaft of the rotating motor, and a driven wheel connected to the driving wheel chain, and the ranging point of the laser sensor is located at the tangent point of the driven wheel and the flywheel.

[0010] The servo-controlled pressure head includes an electric push rod and an end head connected to the electric push rod. The front end of the end head is provided with a connecting shaft adapted to the crank mounting hole.

[0011] The trolley limiting mechanism is symmetrically arranged on the gantry, and the trolley limiting mechanism includes two limiting cylinders and a photoelectric switch arranged on the gantry, and a limiting rod is connected between the two limiting cylinders.

[0012] A safety light curtain is provided at the inlet and outlet directions of the trolley, and the safety light curtain is arranged on the gantry.

[0013] Method for using an automatic CNC crank press based on vision positioning laser detection: S1: The automatic trolley automatically plans a path to travel into the gantry based on the gantry's position information. After passing the safety light curtain and photoelectric switch, it enters the preset position. The automatic trolley carrying the single vehicle enters the operating area of ​​the trolley's limit mechanism. After the automatic trolley blocks the signals of both photoelectric switches, the limit cylinders extend synchronously. The limit rods on both sides act together on both sides of the automatic trolley to limit and clamp the automatic trolley. S2: The visual capture unit captures the position of the crank mounting hole and transmits the data to the control system. The control system analyzes and processes the image information data of the crank mounting hole position of the visual capture detection unit, and then controls the x- and y-axis displacement drive mechanisms to drive the servo-controlled pressure head to move to the workpiece position, so that the connecting shaft is aligned with the mounting hole. The servo-controlled pressure heads on both sides of the gantry simultaneously press into the workpiece; S3, the pressure of the left electric putter is greater than that of the right electric putter, the left electric putter extends to block the crank, the right electric putter extends to press the crank in a little bit, then the pressure of the right electric putter is greater than that of the left electric putter, the right electric putter extends to block the crank, the left electric putter extends to press the crank in a little bit, repeat the above process until the cranks on both sides are fully matched with the middle shaft and pressed in, finally the left and right sides are pressurized to ensure they are in place; S4, the piston rod of the extension cylinder extends to drive the finished product inspection unit to move above the flywheel, and the rotary cylinder drives the sprocket group to rotate, so that the driven wheel of the sprocket group is tangent to the flywheel, and the rotating motor drives the driven wheel to rotate through the chain, so that the flywheel drives the cranks on both sides to rotate, and the distance sensors on the loading platforms on both sides detect the pressing depth of the cranks, and the laser sensor detects the runout value of the flywheel. After both tests meet the standards, the trolley limit is released, and the trolley automatically moves to the qualified finished product workpiece placement area.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Used for assembling bicycle cranks and bottom brackets, the device is highly intelligent and requires no manual operation, creating a fully automated, unmanned production line. A visual camera captures the crank's position, adjusting the end cap to automatically align it with the crank's mounting hole. This allows the servo-controlled press head to precisely position itself for each workpiece, further improving the device's machining accuracy.

[0015] 2. During processing, the servo-controlled pressing heads on both sides of the gantry use a multi-stage intermittent method to press the crank into place, making the pressing process more detailed. The original entire pressing process is broken down into multiple stages. When pressing the crank at different positions, the pressure of the end heads can be adjusted in real time to gradually press the crank into the center axis, avoiding excessive stress caused by the use of high pressure throughout the process and reducing the risk of damage or deformation of the workpiece.

[0016] 3. The pressing process is smooth and suitable for press-fitting workpieces with high-precision requirements. By automatically controlling the high- and low-pressure switching and pressing process of the electric push rods on both sides, the entire pressing process is faster and the overall pressing accuracy can be guaranteed. During the pressing process of the crankshaft, high pressure is used on one side to provide stable support force to prevent the workpiece from deflecting or shaking during the pressing process. Low-pressure and slow pressing helps to reduce the impact force and ensure that the workpiece and accessories fit more tightly and accurately. After the workpiece is assembled, the finished product inspection unit detects the crank deflection value of the assembled crank, which directly reflects the assembly quality of the workpiece, so that the device is automatically controlled by the program from beginning to end.

[0017] 4. The device also uses a safety light curtain to improve safety. When the operator mistakenly enters the warning area of ​​the safety light curtain, an alarm message will be issued and the equipment will stop working. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attachment Figure 1 It is an overall view of the device of the present invention.

[0019] Attachment Figure 2 This is a view from the entrance direction of the gantry body in the present invention.

[0020] Attachment Figure 3 This is a view of the gantry body in the exit direction of the present invention.

[0021] Attachment Figure 4 It is a tangent view of the driven wheel and the flywheel in the present invention.

[0022] Attachment Figure 5 This is a view of the flywheel side gantry frame in the present invention.

[0023] Attachment Figure 6 This is a view of the servo control unit and the stage on the flywheel side of the present invention.

[0024] Reference numerals shown in the accompanying drawings: 1. Automatic traveling trolley; 2. Gantry; 3. X-axis displacement drive mechanism; 4. Y-axis displacement drive mechanism; 5. End; 6. Visual capture unit; 7. Loading platform; 8. Distance measuring sensor; 9. Crank; 10. Flywheel; 11. Extension cylinder; 12. Rotating motor; 13. Rotary cylinder; 14. Outer shell; 15. Driven wheel; 16. Electric push rod; 17. Limit rod; 18. Connecting shaft; 19. Limit cylinder; 20. Photoelectric switch; 21. Laser sensor. DETAILED DESCRIPTION

[0025] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0026] The present invention relates to an automatic CNC crank press based on visual positioning laser detection and its use method. The main structure includes an automatic traveling trolley 1 carrying a single-trolley frame, a gantry 2, a trolley limiting mechanism arranged on the gantry 2, a servo control unit symmetrically arranged on the gantry 2, a finished product detection unit, and a control system. The following is an introduction to each structural unit according to the order of action: Automatic trolley 1: Automatic trolley 1 is an AMR robot, or autonomous mobile robot, which generally refers to a robot that can independently locate and navigate. It does not rely on external auxiliary positioning facilities, can independently identify the environmental map and plan the path, and can autonomously transport a single vehicle frame to the operating area of ​​the trolley limit mechanism. When the automatic trolley 1 carrying the vehicle enters the operating area of ​​the trolley limit mechanism, the safety light curtain detects the entry of the trolley. There are safety light curtains in the inlet and outlet directions of the trolley, and the safety light curtains are installed on the gantry 2. When the operator enters the warning area, an alarm message is issued and the equipment stops working, further improving the safety of the device.

[0027] As the instruction manual Figure 3 As shown, the trolley limiting mechanism: the trolley limiting mechanism is symmetrically arranged on the gantry 2, and the trolley limiting mechanism includes two limiting cylinders 19 and a photoelectric switch 20 arranged on the gantry 2, and a limiting rod 17 is connected between the two limiting cylinders 19.

[0028] After the automatic traveling trolley 1 carrying the bicycle enters the operating area of ​​the trolley limit mechanism, the automatic traveling trolley 1 blocks the signals of both photoelectric switches 20, and the limit cylinder 19 extends synchronously, and the limit rod 17 acts on both sides of the automatic traveling trolley 1 to limit the automatic traveling trolley 1.

[0029] As the instruction manual Figure 5 and Figure 6As shown, the servo control unit includes an x-axis displacement drive mechanism 3 mounted on the gantry 2, a y-axis displacement drive mechanism 4 mounted on the sliding block of the x-axis displacement drive mechanism 3, and a stage 7 mounted on the sliding block of the y-axis displacement drive mechanism 4. The x-axis displacement drive mechanism 3 is a servo motor that drives a ball screw to rotate, thereby driving the slider on the screw to move along the x-axis. The y-axis displacement drive mechanism 4 has the same structure as the x-axis displacement drive mechanism 3. The x- and y-axis displacement drive mechanisms jointly adjust the position of components on the stage 7. The stage 7 is equipped with a servo-controlled press head, a visual capture unit 6, a finished product inspection unit, a laser sensor 21, and a distance sensor 8.

[0030] The visual capture unit 6 includes a 5-megapixel color CCD camera and a light source. When the automatic driving trolley 1 is limited, the CCD camera captures the position of the crank 9 mounting hole and then transmits the data information to the control system. The control system controls the x- and y-axis displacement drive mechanisms to drive the servo-controlled pressure head to move to the workpiece position. The servo-controlled pressure head includes an electric push rod 16 and an end head 5 connected to the electric push rod 16. The front end of the end head 5 is provided with a connecting shaft 18 that is adapted to the mounting hole of the crank 9. When the electric push rod 16 drives the connecting shaft 18 to press the crank 9, the connecting shaft 18 first enters the mounting hole, and the rear end head 5 contacts the outer surface of the crank 9. The electric push rod 16 is a new type of linear actuator mainly composed of a motor, a push rod, and a control device. It has high precision, convenient control, and stable thrust. The process of the electric push rod 16 pressing the crank 9 will be described in the following method steps. After the electric push rod 16 completes the assembly of the crank 9, the assembly quality needs to be tested. After the runout value of the flywheel 10 is detected, the pressing depth of the crank 9 needs to be detected by a distance measuring sensor. The distance measuring sensor measures the contact surface between the crank 9 and the end 5, and then determines the position depth of the crank 9.

[0031] As the instruction manual Figure 4As shown, the finished product detection unit: the finished product detection unit is arranged on the sliding block of the y-axis displacement drive mechanism on the side of the bicycle's flywheel 10. The finished product detection unit drives the bicycle's flywheel 10 to rotate, and the laser sensor 21 is used to detect the runout value of the crank 9. Since the finished product detection unit is arranged on the sliding block of the y-axis displacement drive mechanism, in order to prevent interference between the finished product detection unit and the bicycle frame during the process of the end head 5 pressing the workpiece, the finished product detection unit is connected to an extension cylinder 11. After the end head 5 presses the workpiece, the extension cylinder 11 drives the finished product detection unit to move, and then the runout value of the crank 9 is detected. The data points within the rotation cycle of the flywheel 10 and crank 9 are recorded by a laser rangefinder, and the data is processed and analyzed by the control center to fit the runout results of the flywheel 10 and crank 9. This method can accurately reflect the operating conditions of the flywheel 10 and crank 9 and the degree of offset of the center shaft axis, thereby judging the assembly quality of the equipment.

[0032] When measuring the runout value, it is necessary to make the measuring flywheel 10 and the crank 9 in a circular motion state in order to measure it, so the finished product detection unit includes a rotating motor 12, a sprocket group connected to the shaft of the rotating motor 12, and a rotary cylinder 13 arranged between the sprocket group and the rotating motor 12; the sprocket group includes an outer shell 14 connected to the rotary cylinder 13, a driving wheel connected to the driving shaft of the rotating motor 12, and a driven wheel 15 connected to the driving wheel chain. The ranging point of the laser sensor 21 is located at the tangent point between the driven wheel 15 and the flywheel 10.

[0033] The rotating motor 12 drives the driving wheel of the sprocket group to rotate, and the driving wheel drives the driven wheel 15 to rotate through the chain. In order to make the driven wheel 15 able to contact with the flywheel 10 and ensure that it does not interfere with the flywheel 10 under the drive of the extension cylinder 11, a rotary cylinder 13 is provided to drive the sprocket group to rotate, thereby adjusting the position of the driven wheel 15.

[0034] The specific operation steps for the device are as follows: S1, the automatic traveling trolley 1 automatically plans a path to travel into the gantry 2 according to the position information of the gantry 2, and enters the preset position after passing the safety light curtain and the photoelectric switch 20. The automatic traveling trolley 1 carries the single vehicle into the operating area of ​​the trolley limit mechanism. After the automatic traveling trolley 1 blocks the signals of both photoelectric switches 20, the limit cylinder 19 extends synchronously, and the limit rods 17 on both sides act together on both sides of the automatic traveling trolley 1 to limit and clamp the automatic traveling trolley 1.

[0035] S2, after the trolley is limited and clamped, the visual capture unit 6 captures the position of the mounting hole of the crank 9, and then transmits the data information to the control system, which analyzes and processes the image information data of the position of the mounting hole of the crank 9 taken by the visual capture unit 6, and then controls the x and y axis displacement drive mechanisms to drive the servo control pressure head to move to the workpiece position, so that the connecting shaft 18 is aligned with the mounting hole, and the servo control pressure heads on both sides of the gantry 2 are pressed into the center of the workpiece at the same time; the end head 5 is controlled by the servo electric push rod 16, and the distance control during the displacement process is more precise, and the pressure control acting on the workpiece is more precise. In addition, the servo electric push rod 16 is used. Compared with the hydraulic cylinder and the pneumatic cylinder, the servo electric push rod 16 can be decomposed and pressed in multiple stages. The pressing process of the hydraulic cylinder and the cylinder has low precision and is not easy to control, so the servo electric push rod 16 is more suitable for precision control occasions, and the thrust and displacement distance control are more precise.

[0036] When the left and right push rods 16 are aligned and pressed into the crank 9, the left push rod 16 first has a greater pressure than the right push rod 16, and the left push rod 16 is in a high-pressure state to block the crank 9. The right push rod 16 extends to press the crank 9 in a certain direction, and then the right push rod 16 has a greater pressure than the left push rod 16, and the right push rod 16 extends to block the crank 9, and the left push rod 16 extends to press the crank 9 in a certain direction, and repeats the above process until the cranks 9 on both sides are fully pressed into the middle shaft. The above pressing process can be described as follows: assuming that the pressing process on the left and right sides is an action position from position ten to position zero, the left push rod 16 is in position ten, high pressure blocks the crank 9, and the right side is pressed into position seven with low pressure; then the right side is blocked again with high pressure, and the left side is pressed into position four with low pressure, and so on until both sides are pressed into position zero, and finally the left and right sides are pressurized and pressed into place to ensure they are in place. For the above-mentioned pressing process, the pressure can be adjusted according to the different pressing positions of the end head 5 .

[0037] S4, the piston rod of the extension cylinder 11 is extended to drive the finished product detection unit to move above the flywheel 10, and the rotary cylinder 13 drives the sprocket group to rotate, so that the driven wheel 15 of the sprocket group is tangent to the flywheel 10, and the rotating motor 12 drives the driven wheel 15 to rotate through the chain, so that the flywheel 10 drives the cranks 9 on both sides to rotate, and the distance measuring sensors 8 on the loading platforms 7 on both sides detect the pressing depth of the crank 9, and the laser sensor 21 detects the runout value of the flywheel 10. After the detection meets the standard, the trolley limit is released, and the trolley automatically drives to the qualified finished product workpiece placement area.

[0038] In summary, this device is used for assembling a bicycle crank 9 and a bottom bracket. It features a high level of intelligence and requires no manual operation, resulting in a fully automated, unmanned production line. A visual camera captures the position of the crank 9 to adjust the position of the end head 5, automatically aligning it with the crank 9 mounting hole. This allows the servo-controlled press head to accurately match each workpiece, further improving the device's machining accuracy. During machining, the servo-controlled press heads located on either side of the gantry 2 press the crank 9 using a multi-stage, intermittent method. This allows for a more precise press-in process, breaking the original single-stage press-in process into multiple stages. As the crank 9 is pressed into place at different locations, the pressure of the end head 5 can be adjusted in real time, gradually pressing the crank 9 into the bottom bracket. This avoids excessive stress caused by high pressure throughout the entire process and reduces the risk of workpiece breakage or deformation. The press-in process is smooth and suitable for press-fitting workpieces requiring high precision. Automated control of the high- and low-pressure switching and press-in process of the electric push rods 16 on both sides speeds up the entire press-in process and ensures overall press-in accuracy. During the press-in process, high pressure is applied on one side of the crankshaft to provide stable support, preventing the workpiece from shifting or shaking during the press-in process. Low-pressure, slow-speed press-in helps reduce impact force, ensuring a tighter and more precise fit between the workpiece and the accessories. After the workpiece is assembled, the finished product inspection unit detects the runout value of the assembled crankshaft 9, directly reflecting the assembly quality of the workpiece, allowing the device to be automatically controlled by the program from beginning to end. The device also uses a safety light curtain to improve safety. If an operator mistakenly enters the warning area of ​​the safety light curtain, an alarm message is issued and the equipment stops working.

Claims

1. Automatic CNC crank press based on visual positioning laser detection, characterized by: It comprises an automatic traveling trolley (1) carrying a single-trolley frame, a gantry (2), a trolley limiting mechanism arranged on the gantry (2), a servo control unit symmetrically arranged on the gantry (2), a finished product detection unit, and a control system; The servo control unit comprises an x-axis displacement drive mechanism (3) arranged on the gantry (2), a y-axis displacement drive mechanism (4) arranged on a sliding block of the x-axis displacement drive mechanism (3), and a stage (7) arranged on a sliding block of the y-axis displacement drive mechanism (4); The stage (7) is provided with a servo-controlled pressing head, a visual capture unit (6) connected to a control system signal, a finished product detection unit, a laser sensor (21) and a distance sensor (8); the x-axis and y-axis displacement drive mechanisms jointly adjust the positions of the components of each unit on the stage (7); the visual capture unit (6) transmits data information of the positions of the cranks (9) on both sides to the control system; the control system controls the x-axis and y-axis displacement drive mechanisms to drive the servo-controlled pressing head to move to the position of the workpiece; the servo-controlled pressing heads located on both sides of the gantry (2) press the cranks (9) in a multi-stage intermittent manner to press the workpiece in; The finished product detection unit is arranged on a loading platform (7) on the side of the flywheel (10) of the bicycle, the finished product detection unit drives the flywheel (10) of the bicycle to rotate, the laser sensor (21) detects the runout value of the flywheel (10), and the distance measuring sensor (8) detects the pressing depth of the crank (9).

2. The automatic CNC crank press based on visual positioning laser detection according to claim 1, characterized in that: The finished product detection unit is connected to an extension cylinder (11), and the extension cylinder (11) drives the finished product detection unit to move along the z-axis direction; The finished product detection unit comprises a rotating motor (12), a sprocket group connected to the shaft of the rotating motor (12), and a rotary cylinder (13) arranged between the sprocket group and the rotating motor (12); The sprocket assembly comprises an outer shell (14) connected to a rotary cylinder (13), a driving wheel connected to a driving shaft of a rotary motor (12), and a driven wheel (15) connected to the driving wheel via a chain, wherein a distance measurement point of the laser sensor (21) is located at a tangent point between the driven wheel (15) and the flywheel (10).

3. The automatic CNC crank press based on visual positioning laser detection according to claim 2 is characterized in that: The servo-controlled pressure head comprises an electric push rod (16) and an end head (5) connected to the electric push rod (16); a connecting shaft (18) adapted to a mounting hole of a crank (9) is provided at a front end of the end head (5).

4. The automatic CNC crank press based on visual positioning laser detection according to claim 1, characterized in that: The trolley limiting mechanism is symmetrically arranged on the gantry (2), and comprises two limiting cylinders (19) and a photoelectric switch (20) arranged on the gantry (2), and a limiting rod (17) is connected between the two limiting cylinders (19).

5. The automatic CNC crank press based on visual positioning laser detection according to claim 1, characterized in that: Safety light curtains are provided at the inlet and outlet directions of the trolley, and the safety light curtains are arranged on the gantry (2).

6. The method for using the automatic CNC crank press based on visual positioning laser detection according to any one of claims 1 to 5, characterized in that: S1, the automatic driving trolley (1) automatically plans a path to drive into the gantry (2) according to the position information of the gantry (2), enters the preset position after passing the safety light curtain and the photoelectric switch (20), and the automatic driving trolley (1) carries the single vehicle into the operation area of ​​the trolley limit mechanism. After the automatic driving trolley (1) blocks the signals of the two photoelectric switches (20), the limit cylinder (19) is synchronously extended, and the limit rods (17) on both sides act together on the two sides of the automatic driving trolley (1) to limit and clamp the automatic driving trolley (1); S2, the visual capture unit (6) captures the position of the mounting hole of the crank (9), and then transmits the data information to the control system, which analyzes and processes the image information data of the mounting hole position of the crank (9) of the visual capture detection unit, and then controls the x-axis and y-axis displacement drive mechanisms to drive the servo-controlled pressure head to move to the workpiece position, so that the connecting shaft (18) is aligned with the mounting hole, and the servo-controlled pressure heads located on both sides of the gantry (2) are pressed into the center of the workpiece at the same time; S3, the pressure of the left electric push rod (16) is greater than the pressure of the right electric push rod (16), the left electric push rod (16) is extended to block the crank (9), the right electric push rod (16) is extended to press the crank (9) in a certain distance, and then the pressure of the right electric push rod (16) is greater than the pressure of the left electric push rod (16), the right electric push rod (16) is extended to block the crank (9), the left electric push rod (16) is extended to press the crank (9) in a certain distance, and the above process is repeated until the cranks (9) on both sides are fully matched with the middle shaft and pressed in, and finally the left and right sides are pressurized to ensure that they are in place; S4, the piston rod of the extension cylinder (11) is extended to drive the finished product detection unit to move above the flywheel (10), the rotary cylinder (13) drives the sprocket group to rotate, so that the driven wheel (15) of the sprocket group contacts the flywheel (10), and the rotating motor (12) drives the driven wheel (15) to rotate through the chain, so that the flywheel (10) drives the cranks (9) on both sides to rotate, and the distance measuring sensors (8) on the loading platforms (7) on both sides detect the pressing depth of the cranks (9), and the laser sensor (21) detects the runout value of the flywheel (10). After both tests meet the standards, the limit of the trolley is released, and the trolley automatically drives to the qualified finished product workpiece placement area.

Images