Connecting rod quenching device and control method thereof

Abstract

The invention discloses a heat treatment technology, and aims to provide a connecting rod quenching device and a control method thereof, the key points of the technical scheme are as follows: the connecting rod quenching device comprises a feed hopper for storing a to-be-quenched connecting rod, the whole feed hopper is obliquely arranged, and the feed hopper is internally provided with a lifting structure I for driving a single connecting rod to feed at a time; a first conveying device used for conveying the connecting rod is arranged at the discharging end of the feeding hopper, a cleaning device used for cleaning the surface of the connecting rod is arranged on one side of the feeding hopper, and the first conveying device penetrates through the cleaning device, so that the cleaning device is located in the middle of the first conveying device; the tail end of the first conveying device is provided with a first pushing device used for pushing the connecting rods to the second conveying device, the bottom of the first pushing device in the pushing direction is provided with the second conveying device used for receiving the connecting rods, and the bottom of the second conveying device in the discharging direction is provided with a third conveying device used for receiving the connecting rods. The invention is applicable to the technical field of heat treatment.

Description

Technical Field

[0001] The present invention relates to a heat treatment technology, and more particularly to a connecting rod quenching device and a control method thereof. Background Art

[0002] The connecting rod is a critical mechanical component in an internal combustion engine, converting the reciprocating motion of the piston into the rotational motion of the crankshaft. Therefore, the quenching of the connecting rod is crucial to its performance. Traditional connecting rod quenching processes mostly rely on manual operation or simple mechanical devices, resulting in low efficiency, poor precision, and cumbersome operation. To improve production efficiency and connecting rod quality, modern connecting rod quenching devices have emerged. Although some existing connecting rod quenching devices can achieve automated conveying and quenching of connecting rods, some defects still exist: a low degree of automation, poor equipment operating stability, and inaccurate temperature control during the quenching process. These problems seriously affect the quenching quality and production efficiency of the connecting rod. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention aims to provide a connecting rod quenching device and a control method thereof.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a connecting rod quenching device, comprising a feed hopper for storing connecting rods to be quenched, the feed hopper being tilted as a whole, and a lifting structure for driving a single connecting rod to feed is provided in the feed hopper; a first conveying device for conveying the connecting rod is provided at the discharge end of the feed hopper, a cleaning device for cleaning the surface of the connecting rod is provided on one side of the feed hopper, the first conveying device passes through the cleaning device so that the cleaning device is located in the middle of the first conveying device, a pushing device for pushing the connecting rod to the second conveying device is provided at the end of the first conveying device, and a second conveying device for receiving the connecting rod is provided at the bottom of the pushing direction of the pushing device. A third conveying device for receiving connecting rods is provided at the bottom of the discharge direction of the second conveying device, and a pushing device 2 for pushing the connecting rods to a preparation hopper is provided at the end of the third conveying device. A preparation hopper for receiving connecting rods is provided at the bottom of the pushing device 2 in the discharge direction, and the preparation hopper is tilted as a whole, and a lifting structure 2 for driving a single connecting rod to feed is provided in the preparation hopper. A fourth conveying device for conveying connecting rods is provided at the discharge end of the preparation hopper, and a quenching machine for quenching connecting rods is provided in the middle of the fourth conveying device, and a discharge hopper for receiving finished connecting rods is provided at the end of the fourth conveying device; the connecting rod quenching device also includes a control unit for controlling the overall device.

[0005] The present invention is further configured as follows: the lifting structure 1 is arranged in the feed hopper near the first conveying device, the lifting structure 1 includes a through slot opened on the feed hopper and passing through the feed hopper, a movable block is arranged in the through slot, and a hydraulic cylinder for driving the movable block to move linearly up and down in the through slot is arranged at the bottom of the feed hopper; when the lifting structure 1 is not working, the top surface of the movable block is flush with the bottom surface of the feed hopper; when the lifting structure 1 is working, the hydraulic cylinder drives the movable block so that the movable block drives the single connecting rod to move to the discharge end of the feed hopper;

[0006] The discharge end of the feed hopper is provided with a guide plate 1 for guiding the connecting rod to roll into the first conveying device.

[0007] The present invention is further configured as follows: the pushing device 1 includes a cylinder provided on the first conveying device and away from the pushing direction; a push plate is fixedly provided on the output shaft of the cylinder; and an extension plate 1 is provided on the first conveying device and on the side located in the pushing direction, opposite to the push plate, for guiding the connecting rod to roll into the second conveying device;

[0008] An infrared sensor module is provided on the pushing surface of the push plate, and the distance between the infrared sensor module and the end surface of the push plate close to the cleaning device is greater than or equal to the length of the connecting rod.

[0009] The present invention is further configured as follows: the second conveying device includes a driving device for providing power to drive the conveyor belt, a conveyor belt for carrying and conveying the connecting rod, a roller for supporting and guiding the running direction of the conveyor belt, an idler roller for distributing the load of the conveyor belt and reducing frictional resistance, and a tensioning device for adjusting the tension of the conveyor belt to maintain its stable operation; a plurality of blocking pieces are evenly distributed on the conveyor belt and are parallel to the rollers and are used to prevent the connecting rod from rolling off during conveyance; the ratio of the spacing between adjacent blocking pieces to the length of the connecting rod is 0.6:1-1.1:1;

[0010] An extension plate for guiding the connecting rod to enter the third conveying device is further provided at the end of the second conveying device in the conveying direction.

[0011] The present invention is further configured as follows: the second pushing device includes a cylinder provided on the third conveying device and away from the pushing direction; a push plate is fixedly provided on the output shaft of the cylinder; and a second extension plate is provided on the third conveying device and on the side located in the pushing direction, opposite to the push plate, for guiding the connecting rod to roll into the preparation hopper;

[0012] An infrared sensor module is provided on the pushing surface of the push plate, and the distance between the infrared sensor module and the end surface of the push plate close to the second conveying device is greater than or equal to the length of the connecting rod.

[0013] The present invention is further configured as follows: the second lifting structure is arranged in the preparation hopper near the fourth conveying device, the second lifting structure includes a through slot provided on the preparation hopper and passing through the preparation hopper, a movable block is provided in the through slot, and a hydraulic cylinder for driving the movable block to move linearly up and down in the through slot is provided at the bottom of the preparation hopper; when the second lifting structure is not working, the top surface of the movable block is flush with the bottom surface of the preparation hopper; when the second lifting structure is working, the hydraulic cylinder drives the movable block so that the movable block drives the single connecting rod to move to the discharge end of the preparation hopper;

[0014] The discharge end of the preparation hopper is provided with a guide plate 2 for guiding the connecting rod to roll into the fourth conveying device.

[0015] The present invention is further configured such that the ratio of the push plate length to the connecting rod length is 1.3:1-1.5:1.

[0016] A control method for a connecting rod quenching device, characterized in that it comprises the following steps:

[0017] S1. First, the control unit performs a self-inspection on the entire device before starting to eliminate hidden dangers and ensure that there is no impact on operation. After the self-inspection is correct, the operating parameters of each device and structure are set. Then the operator puts a sufficient amount of connecting rods to be quenched into the feed hopper. Due to the tilt setting of the feed hopper, the connecting rods will be arranged in order towards the discharge end of the feed hopper. Then the operator starts the device through the control unit;

[0018] S2. After starting, the hydraulic cylinder in the lifting structure 1 in the feed hopper drives the movable block so that the movable block drives the single connecting rod to the discharge end of the feed hopper. When the movable block reaches the discharge end, the connecting rod will roll into the first conveying device along with the guide plate 1 through the inclination angle, and will automatically reset when the lifting structure 1 completes the conveying.

[0019] S3. The first conveyor conveys the connecting rod at a preset speed through the cleaning device to the end of the first conveyor, so that the connecting rod is conveyed to the pushing device 1. When the infrared sensor module detects the connecting rod, it triggers the cylinder to push the pushing plate so that the connecting rod rolls along the extension plate 1 into the second conveyor;

[0020] S4. The conveyor belt of the second conveyor device supports the connecting rod through spaced barrier plates, with the ratio of the spacing between adjacent barrier plates to the length of the connecting rod being controlled between 0.6:1 and 1.1:1. When the connecting rod reaches the end of the conveyor belt, it freely falls to the extension plate and rolls along the inclined surface into the third conveyor device.

[0021] S5. The third conveyor transports the connecting rod to the second pushing device. When the infrared sensor module on the push plate detects the connecting rod, it triggers the cylinder to push the push plate so that the connecting rod rolls along the extension plate 2 into the preparation hopper.

[0022] S6. After the connecting rods enter the preparation hopper, the preparation hopper uses the tilting structure to gather the connecting rods to the side close to the fourth conveyor for arrangement. The hydraulic cylinder in the lifting structure 2 in the preparation hopper drives the movable block so that the movable block drives the single connecting rod to the discharge end of the preparation hopper. When the movable block reaches the discharge end, the connecting rod will roll into the fourth conveyor along the guide plate 2 through the tilt angle. When the lifting structure 2 completes the delivery, it will automatically reset.

[0023] S7. The fourth conveyor conveys the connecting rods into the quenching machine for quenching. The monitoring module in the control unit monitors the density of the connecting rods at the entrance of the quenching machine in real time. When the density feedback value is lower than 80% of the preset standard, the operating frequency of the lifting mechanism 2 is automatically increased.

[0024] S8. After the connecting rod enters the quenching machine, several temperature sensors in the quenching machine collect the temperature of the quenching zone in real time to generate a real-time curve. The control unit performs the following judgments:

[0025] S81, dividing the real-time curve into three sections according to the time window: preheating section, main quenching section, and stable section;

[0026] S82. Calculate for each interval: the KL divergence value of the interval corresponding to the standard curve; the ratio of the maximum heating rate to the minimum heating rate; and the standard deviation of the temperature difference between adjacent sampling points;

[0027] S83, if the KL divergence of the primary quenching section is greater than 2.5 and the rate ratio is greater than 3:1, the control unit activates the auxiliary cooling system and reduces the conveying speed of the fourth conveyor by 10%;

[0028] S84. If the standard deviation of the temperature difference in the stable section is greater than the preset threshold, the control unit starts the temperature compensation module and generates a compensation curve. The compensation curve must meet the following requirements: ∫(standard curve - compensation curve)dt≤5°C / s in the last 20 seconds.

[0029] S85. If two of the three intervals simultaneously show: KL divergence > 3 and standard deviation > 120% of the preset threshold, the execution device stops suddenly and triggers an alarm to notify the operator;

[0030] S9. The finished connecting rod after quenching is transported to the discharge hopper via the fourth conveyor. When the weight sensor in the discharge hopper reaches the set value, a signal is automatically sent to remind the operator to store the finished connecting rod in time.

[0031] S10. During the entire operation process, the control unit synchronously analyzes the load current curves of each transmission device. When it detects that the current peak of any device or structure exceeds 30% of the average value of historical operation data and lasts for more than 5 seconds, the device is executed to stop suddenly and an alarm is triggered to notify the operator.

[0032] The beneficial effects of the present invention are:

[0033] 1. Compared with the existing technology, the connecting rod quenching device of the present invention constructs a complete automated material flow system by setting up a coordinated layout of an inclined feed hopper and a preparation hopper; the cooperation of the lifting structure and the multi-stage conveying device realizes the orderly transmission of the connecting rod from feeding to quenching, and the modular integration of the cleaning device and the quenching machine effectively improves the process connection efficiency; the overall coordination of the control unit significantly reduces the manual intervention link, and the inclined hopper design cooperates with the action of gravity to form a self-oriented arrangement function of the material, which solves the material jamming problem caused by the disordered accumulation of connecting rods in traditional devices; the combined design of the multi-stage pushing device and the conveying device ensures the accurate positioning of the material during the process conversion, and is particularly suitable for the stable transmission of connecting rod workpieces with complex geometric shapes; the overall architecture enables the quenching process to achieve full closed-loop control, and has the dual advantages of high processing efficiency and compact equipment.

[0034] 2. In the connecting rod quenching device of the present invention, the precise coordination between the movable block and the through groove realizes the single-piece precise feeding of the connecting rod. The hydraulically driven movable block lifting mechanism not only ensures the controllability of the power output, but also avoids mechanical damage to the surface of the connecting rod. The seamless docking design between the top surface of the movable block and the bottom surface of the feed hopper effectively maintains the continuous flow state of the connecting rod inside the feed hopper. When the lifting action is performed, the hydraulic cylinder guides the movable block to accurately separate the single-piece connecting rod to the discharge end. The design of the guide plate significantly reduces the risk of falling during the transfer of the connecting rod. The closed-loop control characteristics of the hydraulic system enable the lifting stroke to be adaptively adjusted according to connecting rods of different specifications. This modular lifting mechanism not only improves the feeding stability, but its compact structural design also minimizes the equipment space occupied.

[0035] 3. In the present invention, the synergistic effect of the infrared sensor module and the cylinder drive forms an intelligent pushing mechanism, which ensures the accuracy of action triggering through non-contact detection; the specific ratio design of the push plate length and the connecting rod length not only ensures the effective transmission of the pushing force, but also avoids the deflection of the connecting rod caused by size mismatch; the guide structure of the extension plate forms a smooth transition interface with the conveyor belt, which significantly reduces the kinetic energy impact when the connecting rod falls; the front layout of the infrared sensor module realizes the pre-judgment detection of the connecting rod position, ensuring that the pushing action is triggered at the best time; the specially designed buffer contact surface of the device can absorb residual vibration during the pushing process, preventing scratches on the surface of precision workpieces.

[0036] 4. The present invention has a reasonable structure, is easy to manufacture, and is simple to operate. It avoids the defects of the prior art and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural diagram of the connecting rod quenching device of the present invention.

[0038] Figure 2This is a structural diagram of the feed hopper in the connecting rod quenching device of the present invention.

[0039] Figure 3 This is a structural diagram of the preparation hopper in the connecting rod quenching device of the present invention.

[0040] Figure 1-3 Figure numerals: 1. Feed hopper; 2. Lifting structure 1; 3. First conveying device; 4. Cleaning device; 5. Pushing device 1; 6. Second conveying device; 7. Third conveying device; 8. Pushing device 2; 9. Preparation hopper; 10. Lifting structure 2; 11. Fourth conveying device; 12. Quenching machine; 13. Discharge hopper; 14. Through slot; 15. Movable block; 16. Guide plate 1; 17. Cylinder; 18. Push plate; 19. Extension plate 1; 20. Conveyor belt; 21. Blocking plate; 22. Extension plate 2; 23. Guide plate 2. DETAILED DESCRIPTION

[0041] Reference Figure 1-3 The connecting rod quenching device and the control method thereof according to the present invention are further described in detail.

[0042] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to illustrate the relationship between one element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0043] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0044] Figures 1 to 3The connecting rod quenching device shown in the figure includes a feed hopper 1 for storing connecting rods to be quenched, the feed hopper 1 is arranged in an inclined manner as a whole, and a lifting structure 2 is provided in the feed hopper 1 for driving a single connecting rod to feed at a time; a first conveying device 3 for conveying the connecting rod is provided at the discharge end of the feed hopper 1, and a cleaning device 4 for cleaning the surface of the connecting rod is provided on one side of the feed hopper 1, the first conveying device 3 passes through the cleaning device 4, so that the cleaning device 4 is located in the middle of the first conveying device 3, and a pushing device 5 for pushing the connecting rod to the second conveying device 6 is provided at the end of the first conveying device 3, and a second conveying device 6 for receiving the connecting rod is provided at the bottom of the pushing direction of the pushing device 5, and the discharge direction of the second conveying device 6 is provided. A third conveying device 7 for receiving connecting rods is provided at the bottom, and a pushing device 2 8 for pushing the connecting rods to a preparatory hopper 9 is provided at the end of the third conveying device 7. A preparatory hopper 9 for receiving connecting rods is provided at the bottom of the discharging direction of the pushing device 2 8, and the preparatory hopper 9 is arranged as a whole in an inclined manner. A lifting structure 2 10 for driving a single connecting rod to feed is provided in the preparatory hopper 9. A fourth conveying device 11 for conveying connecting rods is provided at the discharge end of the preparatory hopper 9. A quenching machine 12 for quenching the connecting rods is provided in the middle of the fourth conveying device 11. A discharge hopper 13 for receiving finished connecting rods is provided at the end of the fourth conveying device 11; the connecting rod quenching device also includes a control unit for controlling the entire device;

[0045] By setting up a coordinated layout of the inclined feed hopper 1 and the preparation hopper 9, a complete automated material flow system is constructed; the cooperation of the lifting structure and the multi-stage conveying device realizes the orderly transmission of the connecting rod from feeding to quenching, and the modular integration of the cleaning device 4 and the quenching machine 12 effectively improves the process connection efficiency; the overall coordination of the control unit significantly reduces the manual intervention links, and the inclined hopper design cooperates with the action of gravity to form a self-oriented arrangement function of the material, which solves the material jamming problem caused by the disordered accumulation of connecting rods in traditional devices; the combined design of the multi-stage pushing device and the conveying device ensures the accurate positioning of the material during the process conversion, and is especially suitable for the stable transmission of connecting rod workpieces with complex geometric shapes; the overall architecture enables the quenching process to achieve full closed-loop control, and has the dual advantages of high processing efficiency and compact equipment.

[0046] The lifting structure 2 is arranged in the feed hopper 1 near the first conveying device 3, and the lifting structure 2 includes a through slot 14 opened on the feed hopper 1 and passing through the feed hopper 1, a movable block 15 is arranged in the through slot 14, and a hydraulic cylinder for driving the movable block 15 to move linearly up and down in the through slot 14 is provided at the bottom of the feed hopper 1; when the lifting structure 2 is not working, the top surface of the movable block 15 is flush with the bottom surface of the feed hopper 1; when the lifting structure 2 is working, the hydraulic cylinder drives the movable block 15 so that the movable block 15 drives the single connecting rod to move to the discharge end of the feed hopper 1;

[0047] The discharge end of the feed hopper 1 is provided with a guide plate 16 for guiding the connecting rod to roll into the first conveying device 3;

[0048] The precise coordination between the movable block 15 and the through groove 14 realizes the single-piece precise feeding of the connecting rod. The hydraulically driven lifting mechanism of the movable block 15 ensures the controllability of the power output and avoids mechanical damage to the surface of the connecting rod. The seamless docking design between the top surface of the movable block 15 and the bottom surface of the feed hopper 1 effectively maintains the continuous flow state of the connecting rod inside the feed hopper 1. When the lifting action is performed, the hydraulic cylinder guides the movable block 15 to accurately separate the single-piece connecting rod to the discharge end. The design of the guide plate significantly reduces the risk of falling during the transfer of the connecting rod. The closed-loop control characteristics of the hydraulic system enable the lifting stroke to be adaptively adjusted according to the connecting rods of different specifications. This modular lifting mechanism not only improves the feeding stability, but its compact structural design also minimizes the equipment space occupied.

[0049] The pushing device 1 5 includes a cylinder 17 provided on the first conveying device 3 and away from the pushing direction. A push plate 18 is fixedly provided on the output shaft of the cylinder 17. An extension plate 19 is provided on the first conveying device 3 and on the side located in the pushing direction, opposite to the push plate 18, for guiding the connecting rod to roll into the second conveying device 6.

[0050] An infrared sensor module is provided on the pushing surface of the push plate 18, and the distance between the infrared sensor module and the end surface of the push plate 18 close to the cleaning device 4 is greater than or equal to the length of the connecting rod;

[0051] The synergistic effect of the infrared sensor module and the cylinder 17 drive forms an intelligent pushing mechanism, which ensures the accuracy of action triggering through non-contact detection; the specific ratio design of the length of the push plate 18 and the length of the connecting rod not only ensures the effective transmission of the pushing force, but also avoids the deflection of the connecting rod caused by size mismatch; the guide structure of the extension plate 19 and the conveyor belt 20 form a smooth transition interface, which significantly reduces the kinetic energy impact when the connecting rod falls; the front layout of the infrared sensor module realizes the pre-judgment detection of the connecting rod position, ensuring that the pushing action is triggered at the best time; the specially designed buffer contact surface of the device can absorb residual vibration during the pushing process to prevent scratches on the surface of precision workpieces.

[0052] The second conveying device 6 comprises a driving device for providing power to drive the conveyor belt 20, a conveyor belt 20 for carrying and conveying the connecting rod, a roller for supporting and guiding the running direction of the conveyor belt 20, an idler for distributing the load of the conveyor belt 20 and reducing frictional resistance, and a tensioning device for adjusting the tension of the conveyor belt 20 to maintain its stable operation. The conveyor belt 20 is evenly distributed with a number of blocking pieces 21 parallel to the rollers and used to prevent the connecting rod from rolling off during conveyance. The ratio of the spacing between adjacent blocking pieces 21 to the length of the connecting rod is 0.6:1-1.1:1.

[0053] The end of the second conveying device 6 in the conveying direction is also provided with an extension plate for guiding the connecting rod into the third conveying device 7;

[0054] The array design of blocking plates 21 with a spacing ratio of 0.6:1-1.1:1 achieves the best balance between connecting rod limitation and flow efficiency, effectively preventing accidental rolling during transportation and ensuring the smoothness of continuous transportation; the composite support system of rollers and rollers greatly reduces the running resistance of the conveyor belt 20, and the adaptive adjustment function of the tensioning device ensures stable transmission under different load conditions; the modular blocking plate 21 structure facilitates rapid adjustment of the spacing according to the size of the workpiece, significantly improving the material positioning accuracy; the unique anti-drift feature of the conveying device is particularly suitable for the transportation of rod-shaped workpieces that need to maintain a specific posture, and has the reliability to handle high-speed continuous operations.

[0055] The second pushing device 8 includes a cylinder 17 provided on the third conveying device 7 and away from the pushing direction. A push plate 18 is fixedly provided on the output shaft of the cylinder 17. An extension plate 22 is provided on the third conveying device 7 and on the side located in the pushing direction, opposite to the push plate 18, for guiding the connecting rod to roll into the preparation hopper 9.

[0056] An infrared sensor module is provided on the pushing surface of the push plate 18, and the distance between the infrared sensor module and the end surface of the push plate 18 close to the second conveying device 6 is greater than or equal to the length of the connecting rod;

[0057] The dual-sensor collaborative control system realizes the precise triggering of the pushing action, and the redundant design of the infrared detection module improves the fault tolerance of the device operation; the pushing surface of the push plate 18 is made of wear-resistant composite material, maintaining a stable friction coefficient during long-term use; the device effectively prevents the connecting rod from shifting in position when the pushing is terminated.

[0058] The second lifting structure 10 is arranged in the preparation hopper 9 near the fourth conveying device 11. The second lifting structure 10 includes a through slot 14 opened on the preparation hopper 9 and passing through the preparation hopper 9. A movable block 15 is provided in the through slot 14. A hydraulic cylinder for driving the movable block 15 to move linearly up and down in the through slot 14 is provided at the bottom of the preparation hopper 9; when the second lifting structure 10 is not working, the top surface of the movable block 15 is flush with the bottom surface of the preparation hopper 9; when the second lifting structure 10 is working, the hydraulic cylinder drives the movable block 15 so that the movable block 15 drives the single connecting rod to move to the discharge end of the preparation hopper 9;

[0059] The discharge end of the preparation hopper 9 is provided with a second guide plate 23 for guiding the connecting rod to roll into the fourth conveying device 11;

[0060] When the lifting structure 2 10 is in a non-working state, the top surface of the movable block 15 is flush with the bottom surface of the preparation hopper 9, ensuring the normal flow of materials without obstruction; in the working state, the hydraulic cylinder drives the movable block 15 to move up and down in a straight line, thereby driving the connecting rod to the discharge end of the preparation hopper 9, realizing the smooth output of materials; the guide surface of the movable block 15 ensures that the connecting rod automatically corrects its posture during the jacking process; the setting of the guide plate 2 23 ensures that the connecting rod can roll smoothly into the fourth conveying device 11, avoiding transportation problems caused by connecting rod offset or jamming, and further improving the automation and reliability of the equipment; in addition, the use of the hydraulic drive system makes the movement of the lifting structure 2 10 more precise and the response speed fast, reduces the intervention of human operation, and improves production efficiency.

[0061] The ratio of the length of the push plate 18 to the length of the connecting rod is 1.3:1-1.5:1;

[0062] The ratio of the push plate 18 length to the workpiece length is 1.3:1-1.5:1, achieving an optimal balance between mechanical transmission efficiency and equipment compactness, ensuring complete coverage of the pushing action while avoiding energy waste caused by ineffective stroke. This proportional design enables the push plate 18 to form effective torque transmission, and exhibits excellent adaptability especially when processing special-shaped connecting rods. When the push plate 18 is slightly longer than the connecting rod, it can effectively increase the area of thrust application, avoiding equipment damage or unbalanced material handling caused by force concentration during operation. Secondly, this ratio helps the push plate 18 provide stronger thrust during operation, ensuring that the material can be quickly and smoothly moved to the next conveyor device, thereby improving overall work efficiency. At the same time, this design can also reduce vibration and impact of the equipment, avoiding system failures caused by unbalanced or unstable mechanical effects. Obstruction or jam of the conveying device; when the ratio is less than 1.3:1, the length of the push plate 18 relative to the connecting rod is too short, which may cause the force applied by the push plate 18 to be uneven, affecting the fluidity of the connecting rod and thus reducing the working efficiency of the system. At this time, due to the uneven distribution of the force of the push plate 18, the contact area between the push plate 18 and the material may be too small, resulting in the material not being able to flow smoothly, or jamming, thereby increasing the failure rate of the system and even causing damage to the equipment; on the contrary, when the ratio is greater than 1.5:1, the length of the push plate 18 is too long and the specific gravity relative to the connecting rod is too large, which will cause the push plate 18 to bear too much force during operation, and the push plate 18 may be unevenly or excessively stressed, which will lead to increased vibration and impact of the equipment, increased equipment wear and reduced stability of the overall system; therefore, the preferred ratio is 1.3:1-1.5:1.

[0063] A control method for a connecting rod quenching device, characterized in that it comprises the following steps:

[0064] S1. First, the control unit performs a self-inspection on the entire device before starting to eliminate hidden dangers and ensure that there is no impact on operation. After the self-inspection is correct, the operating parameters of each device and structure are set. Then the operator puts a sufficient amount of connecting rods to be quenched into the feed hopper 1. Due to the inclined setting of the feed hopper 1, the connecting rods will be arranged in order towards the discharge end of the feed hopper 1. Then the operator starts the device through the control unit;

[0065] S2. After starting, the hydraulic cylinder in the lifting structure 2 in the feed hopper 1 drives the movable block 15 so that the movable block 15 drives the single connecting rod to the discharge end of the feed hopper 1. When the movable block 15 reaches the discharge end, the connecting rod will roll into the first conveying device 3 along the guide plate 16 through the inclination angle. When the lifting structure 2 completes the conveying, it will automatically reset.

[0066] S3: The first conveyor 3 conveys the connecting rod at a preset speed through the cleaning device 4 to the end of the first conveyor 3, and the connecting rod is conveyed to the pushing device 1 5. When the infrared sensor module detects the connecting rod, it triggers the cylinder 17 to push the push plate 18, causing the connecting rod to roll along the extension plate 19 into the second conveyor 6;

[0067] S4. The conveyor belt 20 of the second conveyor device 6 carries the connecting rod through the spaced blocking pieces 21. The ratio of the spacing between adjacent blocking pieces 21 to the length of the connecting rod is controlled between 0.6:1 and 1.1:1. When the connecting rod reaches the end of the conveyor belt 20, it freely falls to the extension plate and rolls along the inclined surface into the third conveyor device 7.

[0068] S5, the third conveying device 7 transports the connecting rod to the second pushing device 8. When the infrared sensor module on the push plate 18 detects the connecting rod, it triggers the cylinder 17 to push the push plate 18 so that the connecting rod rolls along the second extension plate 22 into the preparation hopper 9;

[0069] S6. After the connecting rods enter the preparatory hopper 9, the preparatory hopper 9 uses the tilting structure to gather the connecting rods to the side close to the fourth conveyor 11 for arrangement. The hydraulic cylinder in the lifting structure 2 10 in the preparatory hopper 9 drives the movable block 15 so that the movable block 15 drives the single connecting rod to the discharge end of the preparatory hopper 9. When the movable block 15 reaches the discharge end, the connecting rod will roll into the fourth conveyor 11 along the guide plate 23 through the tilting angle. When the lifting structure 2 10 completes the delivery, it will automatically reset.

[0070] S7. The fourth conveyor 11 conveys the connecting rods into the quenching machine 12 for quenching. The monitoring module in the control unit monitors the density of the connecting rods at the entrance of the quenching machine 12 in real time. When the density feedback value is lower than 80% of the preset standard, the operating frequency of the lifting mechanism 2 is automatically increased.

[0071] S8. After the connecting rod enters the quenching machine 12, several temperature sensors in the quenching machine 12 collect the temperature of the quenching zone in real time to generate a real-time curve. The control unit performs the following judgment:

[0072] S81, dividing the real-time curve into three sections according to the time window: preheating section, main quenching section, and stable section;

[0073] S82. Calculate for each interval: the KL divergence value of the interval corresponding to the standard curve; the ratio of the maximum heating rate to the minimum heating rate; and the standard deviation of the temperature difference between adjacent sampling points;

[0074] S83, if the KL divergence of the primary quenching section is greater than 2.5 and the rate ratio is greater than 3:1, the control unit activates the auxiliary cooling system and reduces the conveying speed of the fourth conveyor device 11 by 10%;

[0075] S84. If the standard deviation of the temperature difference in the stable section is greater than the preset threshold, the control unit starts the temperature compensation module and generates a compensation curve. The compensation curve must meet the following requirements: ∫(standard curve - compensation curve)dt≤5°C / s in the last 20 seconds.

[0076] S85. If two of the three intervals simultaneously show: KL divergence > 3 and standard deviation > 120% of the preset threshold, the execution device stops suddenly and triggers an alarm to notify the operator;

[0077] S9: After quenching, the finished connecting rod is transported to the discharge hopper 13 via the fourth conveyor 11. When the accumulated weight sensor in the discharge hopper 13 reaches the set value, a signal is automatically sent to remind the operator to store the finished connecting rod in time.

[0078] S10. During the entire operation process, the control unit synchronously analyzes the load current curves of each transmission device. When it detects that the current peak of any device or structure exceeds 30% of the average value of historical operation data and lasts for more than 5 seconds, it executes an emergency stop of the device and triggers an alarm to notify the operator;

[0079] The present invention uses a control unit to collaboratively preset parameters of various devices so that the various devices can operate in an orderly and coherent manner, thereby realizing an automated quenching process for the connecting rod.

[0080] By optimizing the control of each transmission, pushing and quenching process, production efficiency and quenching quality are significantly improved; first, the self-check function ensures that there are no hidden dangers in the equipment before startup, eliminates potential failure risks, and ensures the stability and safety of the equipment; second, the control unit accurately controls the operation of each transmission device, ensuring the smooth transmission of the connecting rod between each link, avoiding blockage or uneven transmission of the connecting rod, thereby improving the overall efficiency of the production line; by intelligently monitoring the temperature distribution of the quenching machine 12, the cooling rate and temperature compensation during the quenching process are timely adjusted to ensure the uniformity and efficiency of the connecting rod quenching process, and reduce product quality problems caused by uneven temperature; in addition, the control unit also has real-time monitoring and abnormality detection functions. When the load current of the equipment is abnormal or the temperature curve in the quenching machine 12 is abnormal, it can immediately perform an emergency stop operation and issue an alarm to notify the operator, thereby avoiding equipment failure or production accidents; in addition, in conjunction with the precise weight detection system, it can ensure the timely collection of finished connecting rods and avoid excessive backlog in the discharge hopper 13.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A connecting rod quenching device, characterized in that: The invention comprises a feeding hopper (1) for storing connecting rods to be quenched, wherein the feeding hopper (1) is arranged in an inclined manner as a whole, and a lifting structure (2) for driving a single connecting rod to feed is arranged in the feeding hopper (1); a first conveying device (3) for conveying the connecting rod is arranged at the discharge end of the feeding hopper (1), and a cleaning device (4) for cleaning the surface of the connecting rod is arranged on one side of the feeding hopper (1), the first conveying device (3) passes through the cleaning device (4), so that the cleaning device (4) is located in the middle of the first conveying device (3), a pushing device (5) for pushing the connecting rod to the second conveying device (6) is arranged at the end of the first conveying device (3), a second conveying device (6) for receiving the connecting rod is arranged at the bottom of the pushing direction of the pushing device (5), and the bottom of the discharging direction of the second conveying device (6) is provided. A third conveying device (7) for receiving connecting rods is provided, and a second pushing device (8) for pushing the connecting rods to a preparatory hopper (9) is provided at the end of the third conveying device (7), and a preparatory hopper (9) for receiving connecting rods is provided at the bottom of the discharging direction of the second pushing device (8), and the preparatory hopper (9) is arranged as a whole in an inclined manner, and a lifting structure (10) for driving a single connecting rod to feed is provided in the preparatory hopper (9), and a fourth conveying device (11) for conveying connecting rods is provided at the discharging end of the preparatory hopper (9), and a quenching machine (12) for quenching the connecting rods is provided in the middle of the fourth conveying device (11), and a discharging hopper (13) for receiving the finished connecting rods is provided at the end of the fourth conveying device (11); the connecting rod quenching device also includes a control unit for controlling the entire device.

2. A connecting rod quenching device according to claim 1, characterized in that: The lifting structure (2) is arranged in the feed hopper (1) near the first conveying device (3), and the lifting structure (2) includes a through slot (14) provided on the feed hopper (1) and passing through the feed hopper (1), a movable block (15) is provided in the through slot (14), and a hydraulic cylinder for driving the movable block (15) to move linearly up and down in the through slot (14) is provided at the bottom of the feed hopper (1); when the lifting structure (2) is not working, the top surface of the movable block (15) is flush with the bottom surface of the feed hopper (1); when the lifting structure (2) is working, the hydraulic cylinder drives the movable block (15) so that the movable block (15) drives the single connecting rod to move to the discharge end of the feed hopper (1); The discharge end of the feed hopper (1) is provided with a guide plate (16) for guiding the connecting rod to roll into the first conveying device (3).

3. A connecting rod quenching device according to claim 1, characterized in that: The pushing device (5) includes a cylinder (17) arranged on the first conveying device (3) and away from the pushing direction, a push plate (18) is fixedly arranged on the output shaft of the cylinder (17), and an extension plate (19) is arranged on the first conveying device (3) and on the side located in the pushing direction, opposite to the push plate (18) and used to guide the connecting rod to roll into the second conveying device (6); An infrared sensor module is provided on the pushing surface of the push plate (18), and the distance between the infrared sensor module and the end surface of the push plate (18) close to the cleaning device (4) is greater than or equal to the length of the connecting rod.

4. A connecting rod quenching device according to claim 1, characterized in that: The second conveying device (6) comprises a driving device for providing power to drive the conveyor belt (20) to operate, a conveyor belt (20) for carrying and conveying the connecting rod, a roller for supporting and guiding the running direction of the conveyor belt (20), a roller for dispersing the load of the conveyor belt (20) and reducing friction resistance, and a tensioning device for adjusting the tension of the conveyor belt (20) to maintain its stable operation; a plurality of blocking pieces (21) are evenly arranged on the conveyor belt (20) and are parallel to the roller and used to prevent the connecting rod from rolling off during the conveying process; the ratio of the spacing between adjacent blocking pieces (21) to the length of the connecting rod is 0.6:1-1.1:1; An extension plate for guiding the connecting rod to enter the third conveying device (7) is also provided at the end of the second conveying device (6) in the conveying direction.

5. The connecting rod quenching device according to claim 1, characterized in that: The second pushing device (8) includes a cylinder (17) arranged on the third conveying device (7) and away from the pushing direction, a push plate (18) is fixedly arranged on the output shaft of the cylinder (17), and an extension plate (22) is arranged on the third conveying device (7) and on the side located in the pushing direction, opposite to the push plate (18) and used to guide the connecting rod to roll into the preparation hopper (9); An infrared sensor module is provided on the pushing surface of the push plate (18), and the distance between the infrared sensor module and the end surface of the push plate (18) close to the second conveying device (6) is greater than or equal to the length of the connecting rod.

6. A connecting rod quenching device according to claim 1, characterized in that: The second lifting structure (10) is arranged in the preparation hopper (9) near the fourth conveying device (11), and the second lifting structure (10) includes a through slot (14) provided on the preparation hopper (9) and passing through the preparation hopper (9), a movable block (15) is provided in the through slot (14), and a hydraulic cylinder for driving the movable block (15) to move linearly up and down in the through slot (14) is provided at the bottom of the preparation hopper (9); when the second lifting structure (10) is not working, the top surface of the movable block (15) is flush with the bottom surface of the preparation hopper (9); when the second lifting structure (10) is working, the hydraulic cylinder drives the movable block (15) so that the movable block (15) drives the single connecting rod to move to the discharge end of the preparation hopper (9); The discharge end of the preparation hopper (9) is provided with a second guide plate (23) for guiding the connecting rod to roll into the fourth conveying device (11).

7. A connecting rod quenching device according to claim 3 or 5, characterized in that: The ratio of the length of the push plate (18) to the length of the connecting rod is 1.3:1-1.5:

1.

8. A control method applicable to the connecting rod quenching device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. First, the control unit performs a self-inspection on the entire device before starting to eliminate hidden dangers and ensure that the operation is not affected. After the self-inspection is correct, the operating parameters of each device and structure are set. Then, the operator puts a sufficient amount of connecting rods to be quenched into the feed hopper (1). Due to the tilt setting of the feed hopper (1), the connecting rods will be arranged in order toward the discharge end of the feed hopper (1). Then, the operator starts the device through the control unit; S2. After starting, the hydraulic cylinder in the lifting structure 1 (2) in the feed hopper (1) drives the movable block (15) so that the movable block (15) drives the single connecting rod to the discharge end of the feed hopper (1). When the movable block (15) reaches the discharge end, the connecting rod will roll into the first conveying device (3) along with the guide plate 1 (16) through the inclination angle, and will automatically reset when the lifting structure 1 (2) completes the conveying. S3, the first conveying device (3) conveys the connecting rod at a preset speed through the cleaning device (4) to the end of the first conveying device (3), so that the connecting rod is conveyed into the pushing device (5). When the infrared sensor module detects the connecting rod, the cylinder (17) is triggered to push the pushing plate (18) so that the connecting rod rolls along the extension plate (19) into the second conveying device (6); S4, the conveyor belt (20) of the second conveyor device (6) carries the connecting rod through the spaced blocking pieces (21), and the ratio of the spacing between adjacent blocking pieces (21) to the length of the connecting rod is controlled between 0.6:1 and 1.1:1; when the connecting rod reaches the end of the conveyor belt (20), it freely falls to the extension plate and rolls along the inclined surface into the third conveyor device (7); S5, the third conveying device (7) transports the connecting rod to the second pushing device (8), and when the infrared sensor module on the push plate (18) detects the connecting rod, it triggers the cylinder (17) to push the push plate (18) so that the connecting rod rolls along the second extension plate (22) into the preparation hopper (9); S6. After the connecting rod enters the preparation hopper (9), the preparation hopper (9) gathers the connecting rods to one side close to the fourth conveying device (11) through the tilting structure and arranges them. The hydraulic cylinder in the lifting structure 2 (10) in the preparation hopper (9) drives the movable block (15) so that the movable block (15) drives the single connecting rod to the discharge end of the preparation hopper (9). When the movable block (15) reaches the discharge end, the connecting rod will roll into the fourth conveying device (11) along the guide plate 2 (23) through the tilting angle, and automatically reset when the lifting structure 2 (10) completes the transmission; S7, the fourth conveying device (11) conveys the connecting rod into the quenching machine (12) for quenching, and the monitoring module in the control unit monitors the density of the connecting rod distribution at the entrance of the quenching machine (12) in real time; when the density feedback value is lower than 80% of the preset standard, the operating frequency of the lifting mechanism 2 is automatically increased; S8. After the connecting rod enters the quenching machine (12), several temperature sensors in the quenching machine (12) collect the temperature of the quenching zone in real time to generate a real-time curve, and the control unit performs the following judgment: S81, dividing the real-time curve into three sections according to the time window: preheating section, main quenching section, and stable section; S82. Calculate for each interval: the KL divergence value of the interval corresponding to the standard curve; the ratio of the maximum heating rate to the minimum heating rate; and the standard deviation of the temperature difference between adjacent sampling points; S83, if the KL divergence of the main quenching section is greater than 2.5 and the rate ratio is greater than 3:1, the control unit activates the auxiliary cooling system and reduces the conveying speed of the fourth conveying device (11) by 10%; S84. If the standard deviation of the temperature difference in the stable section is greater than the preset threshold, the control unit starts the temperature compensation module and generates a compensation curve. The compensation curve must meet the following requirements: ∫(standard curve - compensation curve)dt≤5°C / s in the last 20 seconds. S85. If two of the three intervals simultaneously show: KL divergence > 3 and standard deviation > 120% of the preset threshold, the execution device stops suddenly and triggers an alarm to notify the operator; S9, the finished connecting rod after quenching is transported to the discharge hopper (13) via the fourth conveyor device (11). When the weight sensor in the discharge hopper (13) reaches the set value, it automatically sends a signal to remind the operator to store the finished connecting rod in time; S10. During the entire operation process, the control unit synchronously analyzes the load current curves of each transmission device. When it detects that the current peak of any device or structure exceeds 30% of the average value of historical operation data and lasts for more than 5 seconds, the device is executed to stop suddenly and an alarm is triggered to notify the operator.

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