Automatic thread rolling device for connecting rod and control method thereof

Abstract

The present invention discloses an external thread processing equipment for a connecting rod, aiming to provide an automatic thread rolling device for a connecting rod and a control method thereof, which can realize the automation, intelligence and efficiency of thread rolling processing of the connecting rod, improve processing accuracy and product consistency, and reduce production cost and labor intensity. The key points of the technical scheme are that a feeding structure and a material transporting structure are arranged in the device, and thread rolling structures are arranged at both ends of the feeding structure. By driving the connecting rod with the feeding device, both ends of the connecting rod can be threaded through the thread rolling structure. Compared with the traditional processing method for both ends of the connecting rod, the processing of both ends of the connecting rod can be completed in one clamping, and the problem of secondary positioning after multiple clamping is avoided, the overall processing accuracy is improved, the time required for secondary processing and adjustment of positioning is omitted, the processing efficiency is significantly improved, the time required for processing is shortened, and the demand for large-scale production is met. The present invention is suitable for the field of connecting rod processing technology.

Description

Technical Field

[0001] The present invention relates to an external thread processing device for a connecting rod, and more specifically, to an automatic thread rolling device for a connecting rod and a control method thereof. Background Art

[0002] As a key component in mechanical transmission systems, connecting rods are widely used in automobile engines, compressors, hydraulic systems and other fields. Threads are usually processed at both ends to connect with other components. Traditional connecting rod thread rolling mainly relies on manual operation or semi-automatic equipment, which has the following disadvantages: 1. Low efficiency and high labor intensity of manual operation. Manual loading and unloading, tool setting, equipment startup and other operation steps are cumbersome, production efficiency is low, and workers have high labor intensity, easy fatigue, and potential safety hazards.

[0003] 2. Semi-automatic equipment has low precision and poor consistency. Although semi-automatic equipment has partially replaced manual operations, it still requires manual intervention, making it difficult to ensure processing accuracy and product consistency. Quality problems such as out-of-tolerance thread size and incomplete tooth profile are prone to occur.

[0004] 3. The degree of automation is low and it is difficult to adapt to mass production. Traditional processing methods make it difficult to achieve automated production of connecting rod thread rolling and cannot meet the modern manufacturing industry's demand for high efficiency, high quality and low cost production. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an automatic thread rolling device for a connecting rod and a control method thereof, aiming to realize the automation, intelligence and efficiency of the connecting rod thread rolling processing, improve the processing accuracy and product consistency, and reduce the production cost and labor intensity.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an automatic thread rolling device for a connecting rod, comprising a feeding structure and a thread rolling structure arranged at both ends of the feeding structure, the thread rolling structure comprising a fixed thread rolling wheel and a movable thread rolling wheel, a processing table is arranged between the movable thread rolling wheel and the fixed thread rolling wheel, a driving assembly is arranged on the side of the movable thread rolling wheel away from the fixed thread rolling wheel, the driving assembly comprises a driving cylinder and a connecting frame arranged between the driving cylinder and the movable thread rolling wheel, the driving cylinder drives the movable thread rolling wheel to be relatively close to / away from the fixed thread rolling wheel through the connecting frame, the feeding structure comprises a sliding frame and a hopper arranged on the sliding frame, a transmission belt is arranged on the sliding frame, a clamping assembly is arranged on the transmission belt, and a driving gear group is also arranged at the bottom of the transmission belt, and the driving gear group is used to drive the transmission belt to make reciprocating motion on the sliding frame.

[0007] The present invention is further configured as follows: a plurality of rotating components are also provided in the thread rolling structure, and the rotating components include a power motor and a rotating spindle arranged on the power motor, and each rotating component is respectively connected to a fixed thread rolling wheel and a movable thread rolling wheel, and the rotating component arranged at the fixed thread rolling wheel end rotates in an opposite direction to the rotating component arranged at the movable thread rolling wheel end.

[0008] The present invention is further configured as follows: a material transport structure is also provided on one side of the sliding frame, and the material transport structure includes a material lifting assembly arranged in the hopper and a circulation assembly arranged between the hopper and the sliding frame, and the material lifting assembly includes a connecting rod climbing frame arranged in the hopper and a material lifting plate arranged on the connecting rod climbing frame, and the ratio of the width of the material lifting plate to the diameter of the connecting rod is 3:2.

[0009] Preferably, the circulation assembly includes a material transport rack, a material transport trough disposed on the material transport rack, and a discharge plate disposed on one end of the material transport rack close to the sliding rack, and the connecting rod in the ejecting assembly is moved to the sliding rack through the circulation assembly.

[0010] Preferably, a transmission assembly is further provided between the power motor and the transmission main shaft, the transmission assembly comprising a driving wheel and a driven wheel transmission-connected to the driving wheel, the driving wheel is fixedly connected to the power motor, and the driven wheel is fixedly connected to the rotating main shaft.

[0011] The present invention is further configured as follows: the driving gear set includes a first driving wheel arranged at one end of the transmission belt and a second driving wheel arranged at the other end of the transmission belt, and the first driving wheel and the second driving wheel are both provided with a driving motor, and the driving motor corresponding to the first driving wheel and the driving motor corresponding to the second driving wheel have opposite rotation directions.

[0012] The present invention is further configured as follows: the fixed thread rolling wheel and the movable thread rolling wheel are provided with processing grooves, the processing grooves are configured to interfere with the outer surface of the connecting rod and form external threads on the connecting rod surface, and the processing grooves on the fixed thread rolling wheel and the processing grooves on the movable thread rolling wheel are arranged alternately.

[0013] The present invention is further configured as follows: pressure sensors are provided on the fixed thread rolling wheel and the movable thread rolling wheel, and the pressure sensors are configured to detect the state of the connecting rod in the thread rolling structure. A control system is provided at one end of the pressure sensor, and a positioning assembly is also provided on the transmission belt. The positioning assembly includes two baffles arranged on the transmission belt and a position sensor arranged on the baffle. The position sensor is electrically connected to the control system, and the positioning assembly is used to fix the specific position of the connecting rod on the transmission belt.

[0014] The present application also provides a control method for an automatic thread rolling device for a connecting rod, the thread rolling method for a connecting rod comprising the following steps: S1, starting the device, setting a detection threshold of a pressure sensor to P;

[0015] S2, the control system detects that before the thread rolling process, the driving cylinder drives the mobile thread rolling wheel to move toward the fixed thread rolling wheel, and sets the maximum moving distance to L. After the mobile thread rolling wheel moves L distance, the pressure sensor is subjected to a pressure range. If the maximum pressure value detected is greater than P, it is determined that the distance between the current mobile thread rolling wheel and the processing table is too close, which may easily cause the surface of the mobile thread rolling wheel to be worn. The device stops and notifies the staff for maintenance. On the contrary, if the maximum pressure value detected is ≤P, it is determined that the current mobile thread rolling wheel is not in contact with the processing table, and jumps to S3 for feeding.

[0016] S3, the feeding structure and the transporting structure move the connecting rod in the hopper onto the transmission belt, and the positioning component on the transmission belt adjusts the position of the connecting rod on the transmission belt and fixes it through the clamping component;

[0017] S4, the first driving wheel at one end of the transmission belt rotates and drives the transmission belt to move in the first direction, and at the same time, the connecting rod on the transmission belt moves toward the rolling structure close to one side;

[0018] S5, the control system detects whether the connecting rod reaches the thread rolling structure. If so, it is determined that the current connecting rod has reached the specified position and jumps to S6 for thread rolling processing. Otherwise, it is determined that the connecting rod has not reached the specified position, the transmission belt continues to move and is detected again;

[0019] S6, the driving cylinder drives the movable thread rolling wheel to move toward the fixed thread rolling wheel again, and at the same time, the pressure sensor detects the pressure P1 exerted on the fixed thread rolling wheel and the movable thread rolling wheel. If the pressure P1 detected by the pressure sensor is 0, it is determined that the movable thread rolling wheel and the fixed thread rolling wheel are not in contact with the connecting rod, and the driving cylinder continues to drive the movable thread rolling wheel to move toward the fixed thread rolling wheel. On the contrary, if the pressure P1 detected by the pressure sensor is greater than 0, it is determined that the movable thread rolling wheel and the fixed thread rolling wheel are in contact with the connecting rod, and the process jumps to S7 to continue operation.

[0020] S7. Based on the thread depth h of the external thread of the connecting rod, the control system controls the driving assembly to move the mobile thread rolling wheel toward the fixed thread rolling wheel. The moving distance is 1.23h. The pressure sensor detects the pressure P2 exerted on the mobile thread rolling wheel and the fixed thread rolling wheel during the thread rolling process. If P2≥2P, it is determined that the pressure exerted on the current mobile thread rolling wheel and the fixed thread rolling wheel is too large, the device stops and notifies the staff for maintenance. On the contrary, if P2<2P, it is determined that the device is operating normally, and the connecting rod exits the current thread rolling structure to complete the thread rolling at one end.

[0021] S8, the second driving wheel at the other end of the transmission belt rotates and drives the transmission belt to move in the second direction, and at the same time, the connecting rod on the transmission belt moves toward the rolling structure on the other side;

[0022] S9. Repeat steps S5-S7 for the thread rolling structure on the other side to complete the thread rolling process on the current connecting rod. The device discharges the material and jumps back to S3 for further processing.

[0023] Preferably, the step S3 further includes adjusting the position of the connecting rod, including the following steps: S31, the control system determines the current center position of the transmission belt according to the distance between the rolling structures at both ends of the transmission belt;

[0024] S32, the position sensor adjusts the positions of the two baffles on the transmission belt according to the current center position of the transmission belt, so that the two baffles are at equal distances from the center of the transmission belt, and the distance between the two baffles is equal to the length of the connecting rod, and the position sensor records the current positions of the two baffles, and the baffles are away from each other and at least a gap is reserved for connecting rod loading;

[0025] S33. After the connecting rod is loaded onto the transmission belt, the baffle moves to the recording position of the position sensor and pushes the connecting rod on the transmission belt to move to the specified position. At the same time, the control system detects whether the connecting rod position is normal. If so, it is determined that the current connecting rod has reached the specified position and the connecting rod is processed. Otherwise, it means that the connecting rod position is abnormal, the device stops and notifies the staff for maintenance.

[0026] By adopting the above technical scheme, the beneficial effects are as follows: 1. By arranging a feeding structure and a material transporting structure in the device, and both ends of the feeding structure are provided with a thread rolling structure, during the processing of the connecting rod, the connecting rod can be driven by the feeding device, so that both ends of the connecting rod can be threaded through the thread rolling structure. Similarly, the above device can realize the thread processing on one side of the connecting rod by starting the thread rolling structure on one side. When the device processes both ends of the connecting rod, the thread rolling processing on both ends of the connecting rod can be realized after controlling the reciprocating movement of the transmission belt by driving the gear set. Compared with the traditional processing method of the two ends of the connecting rod, the processing of the two ends of the connecting rod can be completed in one clamping, avoiding the problem of secondary positioning after multiple clamping, improving the overall processing accuracy, omitting the time required for secondary processing and adjustment of positioning, significantly improving the processing efficiency, shortening the time required for processing, and adapting to large-scale production needs.

[0027] 2. Furthermore, in order to improve the processing accuracy of the connecting rod thread rolling processing and improve production efficiency, the automatic loading and unloading, precise positioning and double-end thread rolling processing of the connecting rod are realized through the coordinated cooperation of the feeding structure, the material transport structure and the double thread rolling structure. The reciprocating motion of the transmission belt combined with the clamping assembly and the positioning assembly ensures the continuous flow of the connecting rod during the processing, reduces manual intervention, and greatly improves production efficiency. At the same time, a thread rolling structure with symmetrical distribution on both sides is adopted. The transmission belt is controlled to move back and forth by driving the gear set, so that the connecting rod can complete the thread processing at both ends in one clamping, avoiding the secondary positioning problem after traditional single-end processing, and significantly shortening the overall processing time. In addition, based on the closed-loop feedback control of the pressure sensor and the position sensor, the contact pressure and positioning accuracy of the thread rolling wheel and the connecting rod are monitored in real time, and the displacement of the thread rolling wheel and the processing force are accurately controlled to ensure the consistency of the thread size and improve product quality.

[0028] 3. At the same time, a multi-level intelligent control logic is embedded in the pump device, which monitors the contact pressure between the thread rolling wheel and the connecting rod in real time through the pressure sensor, and detects the positioning accuracy of the connecting rod in combination with the position sensor. When the pressure exceeds the limit (such as P2 ≥ 2P) or the connecting rod position is offset, the control system immediately shuts down and alarms to avoid equipment wear and waste. At the same time, by setting the pressure threshold (such as P, 2P) and the moving distance (such as 1.23h), the displacement of the thread rolling wheel and the processing force are accurately controlled to ensure the integrity of the thread profile and the consistency of the size. This closed-loop control mechanism not only improves the processing accuracy, but also reduces the equipment failure rate and reduces the time and cost of manual troubleshooting.

[0029] 4. The thread rolling structure and feeding structure of the present invention adopt modular design, such as detachable rotating components, driving gear sets and ejector components, which are convenient for quick replacement of worn parts or adjustment of processing parameters. The specific ratio (3:2) between the ejector plate and the connecting rod diameter optimizes the feeding stability and ensures the smooth flow of connecting rods of different specifications. In addition, the staggered design of the processing groove and the dynamic adjustment function of the pressure sensor enable the equipment to adapt to the processing requirements of connecting rods of various specifications, improving the versatility and market competitiveness of the equipment.

[0030] 5. The present invention balances the torque load during the thread rolling process and reduces energy loss through the counter-rotating rotating components and driving motors. The pressure sensor dynamically adjusts the output force of the driving cylinder to avoid ineffective work and further reduce energy consumption. At the same time, the fully automated production mode reduces labor costs, and combined with the intelligent fault detection mechanism, reduces equipment maintenance costs and scrap rates. These designs significantly optimize the production cost of each unit product, improve economic benefits, and create higher market value for the company. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1It is a schematic diagram of the specific structure of an embodiment of an automatic thread rolling device for a connecting rod and a control method thereof of the present invention;

[0032] Figure 2 A schematic diagram of the specific structure of a thread rolling structure of an automatic thread rolling device for a connecting rod and a control method thereof according to an embodiment of the present invention;

[0033] Figure 3 It is a schematic diagram of the specific structure of the material transport structure of an embodiment of an automatic thread rolling device for a connecting rod and a control method thereof of the present invention;

[0034] Figure 4 It is a schematic diagram of the specific structure of the flow assembly of an embodiment of an automatic thread rolling device for a connecting rod and a control method thereof of the present invention;

[0035] Figure 5 A flow chart of a connecting rod thread rolling method according to an embodiment of an automatic thread rolling device for a connecting rod and a control method thereof of the present invention;

[0036] Figure 6 It is a flow chart of a connecting rod position adjustment method according to an embodiment of an automatic thread rolling device for a connecting rod and a control method thereof of the present invention;

[0037] The reference numerals in the figure are as follows: 1. feeding structure; 11. sliding frame; 12. hopper; 13. transmission belt; 14. clamping assembly; 15. driving gear set; 151. first driving wheel; 152. second driving wheel; 153. driving motor; 2. thread rolling structure; 21. fixed thread rolling wheel; 22. movable thread rolling wheel; 23. processing table; 24. driving assembly; 241. driving cylinder; 242. connecting frame; 3. rotating assembly; 31. power motor; 32. rotating main shaft; 4. material transport structure; 41. material ejecting assembly; 411. connecting rod climbing frame; 412. material ejecting plate; 42. circulation assembly; 421. material transport frame; 422. material transport trough; 423. material discharge plate; 5. transmission assembly; 51. driving wheel; 52. driven wheel; 6. processing trough; 7. baffle. DETAILED DESCRIPTION

[0038] Reference Figures 1 to 6 An embodiment of an automatic thread rolling device for a connecting rod and a control method thereof of the present invention is further described.

[0039] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the 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 "on" 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.

[0040] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0041] An automatic thread rolling device for a connecting rod comprises a feeding structure 1 and a thread rolling structure 2 arranged at both ends of the feeding structure 1, the thread rolling structure 2 comprises a fixed thread rolling wheel 21 and a movable thread rolling wheel 22, a processing table 23 is arranged between the movable thread rolling wheel 22 and the fixed thread rolling wheel 21, a driving component 24 is arranged on the side of the movable thread rolling wheel 22 away from the fixed thread rolling wheel 21, the driving component 24 comprises a driving cylinder 241 and a connecting frame 242 arranged between the driving cylinder 241 and the movable thread rolling wheel 22, the driving cylinder 241 drives the movable thread rolling wheel 22 to be relatively close to / away from the fixed thread rolling wheel 21 through the connecting frame 242, the feeding structure 1 comprises a sliding frame 11 and a hopper 12 arranged on the sliding frame 11, a transmission belt 13 is arranged on the sliding frame 11, a clamping component 14 is arranged on the transmission belt 13, and a driving gear set 15 is also arranged at the bottom of the transmission belt 13, and the driving gear set 15 is used to drive the transmission belt 13 to make a reciprocating motion on the sliding frame 11.

[0042] The thread rolling structure 2 is also provided with a plurality of rotating components 3, and the rotating components 3 include a power motor 31 and a rotating main shaft 32 arranged on the power motor 31. Each rotating component 3 is respectively connected to the fixed thread rolling wheel 21 and the movable thread rolling wheel 22, and the rotating component 3 arranged at the end of the fixed thread rolling wheel 21 rotates in the opposite direction to the rotating component 3 arranged at the end of the movable thread rolling wheel 22.

[0043] A material transport structure 4 is also provided on one side of the sliding frame 11, and the material transport structure 4 includes a material lifting component 41 arranged in the hopper 12 and a circulation component 42 arranged between the hopper 12 and the sliding frame 11. The material lifting component 41 includes a connecting rod climbing frame 411 arranged in the hopper 12 and a material lifting plate 412 arranged on the connecting rod climbing frame 411, and the ratio of the width of the material lifting plate 412 to the diameter of the connecting rod is 3:2.

[0044] Preferably, the circulation component 42 includes a material transport rack 421, a material transport trough 422 arranged on the material transport rack 421, and a discharge plate 423 arranged at one end of the material transport rack 421 close to the sliding rack 11, and the connecting rod in the lifting component 41 is moved to the sliding rack 11 through the circulation component 42.

[0045] Preferably, a transmission assembly 5 is further provided between the power motor 31 and the transmission main shaft, and the transmission assembly 5 includes a driving wheel 51 and a driven wheel 52 transmission-connected to the driving wheel 51 , the driving wheel 51 is fixedly connected to the power motor 31 , and the driven wheel 52 is fixedly connected to the rotating main shaft 32 .

[0046] The driving gear set 15 includes a first driving wheel 151 arranged at one end of the transmission belt 13 and a second driving wheel 152 arranged at the other end of the transmission belt 13. The first driving wheel 151 and the second driving wheel 152 are both provided with a driving motor 153, and the driving motor 153 corresponding to the first driving wheel 151 and the driving motor 153 corresponding to the second driving wheel 152 have opposite rotation directions.

[0047] The fixed thread rolling wheel 21 and the movable thread rolling wheel 22 are provided with processing grooves 6, and the processing grooves 6 are configured to interfere with the outer surface of the connecting rod and form external threads on the connecting rod surface, and the processing grooves 6 on the fixed thread rolling wheel 21 and the processing grooves 6 on the movable thread rolling wheel 22 are arranged alternately.

[0048] The fixed thread rolling wheel 21 and the movable thread rolling wheel 22 are both provided with pressure sensors, and the pressure sensors are configured to detect the state of the connecting rod in the thread rolling structure 2. A control system is provided at one end of the pressure sensor. A positioning component is also provided on the transmission belt 13, and the positioning component includes two baffles 7 arranged on the transmission belt 13 and a position sensor arranged on the baffle 7. The position sensor is electrically connected to the control system, and the positioning component is used to fix the specific position of the connecting rod on the transmission belt 13.

[0049] The present application also provides a control method for an automatic thread rolling device for a connecting rod, the thread rolling method for a connecting rod comprising the following steps: S1, starting the device, setting a detection threshold of a pressure sensor to P;

[0050] S2, the control system detects that before the thread rolling process, the driving cylinder drives the mobile thread rolling wheel to move toward the fixed thread rolling wheel, and sets the maximum moving distance to L. After the mobile thread rolling wheel moves L distance, the pressure sensor is subjected to a pressure range. If the maximum pressure value detected is greater than P, it is determined that the distance between the current mobile thread rolling wheel and the processing table is too close, which may easily cause the surface of the mobile thread rolling wheel to be worn. The device stops and notifies the staff for maintenance. On the contrary, if the maximum pressure value detected is ≤P, it is determined that the current mobile thread rolling wheel is not in contact with the processing table, and jumps to S3 for feeding.

[0051] S3, the feeding structure and the transporting structure move the connecting rod in the hopper onto the transmission belt, and the positioning component on the transmission belt adjusts the position of the connecting rod on the transmission belt and fixes it through the clamping component;

[0052] S4, the first driving wheel at one end of the transmission belt rotates and drives the transmission belt to move in the first direction, and at the same time, the connecting rod on the transmission belt moves toward the rolling structure close to one side;

[0053] S5, the control system detects whether the connecting rod reaches the thread rolling structure. If so, it is determined that the current connecting rod has reached the specified position and jumps to S6 for thread rolling processing. Otherwise, it is determined that the connecting rod has not reached the specified position, the transmission belt continues to move and is detected again;

[0054] S6, the driving cylinder drives the movable thread rolling wheel to move toward the fixed thread rolling wheel again, and at the same time, the pressure sensor detects the pressure P1 exerted on the fixed thread rolling wheel and the movable thread rolling wheel. If the pressure P1 detected by the pressure sensor is 0, it is determined that the movable thread rolling wheel and the fixed thread rolling wheel are not in contact with the connecting rod, and the driving cylinder continues to drive the movable thread rolling wheel to move toward the fixed thread rolling wheel. On the contrary, if the pressure P1 detected by the pressure sensor is greater than 0, it is determined that the movable thread rolling wheel and the fixed thread rolling wheel are in contact with the connecting rod, and the process jumps to S7 to continue operation.

[0055] S7. Based on the thread depth h of the external thread of the connecting rod, the control system controls the driving assembly to move the mobile thread rolling wheel toward the fixed thread rolling wheel. The moving distance is 1.23h. The pressure sensor detects the pressure P2 exerted on the mobile thread rolling wheel and the fixed thread rolling wheel during the thread rolling process. If P2≥2P, it is determined that the pressure exerted on the current mobile thread rolling wheel and the fixed thread rolling wheel is too large, the device stops and notifies the staff for maintenance. On the contrary, if P2<2P, it is determined that the device is operating normally, and the connecting rod exits the current thread rolling structure to complete the thread rolling at one end.

[0056] S8, the second driving wheel at the other end of the transmission belt rotates and drives the transmission belt to move in the second direction, and at the same time, the connecting rod on the transmission belt moves toward the rolling structure on the other side;

[0057] S9. Repeat steps S5-S7 for the thread rolling structure on the other side to complete the thread rolling process on the current connecting rod. The device discharges the material and jumps back to S3 for further processing.

[0058] Preferably, the step S3 further includes adjusting the position of the connecting rod, including the following steps: S31, the control system determines the current center position of the transmission belt according to the distance between the rolling structures at both ends of the transmission belt;

[0059] S32, the position sensor adjusts the positions of the two baffles on the transmission belt according to the current center position of the transmission belt, so that the two baffles are at equal distances from the center of the transmission belt, and the distance between the two baffles is equal to the length of the connecting rod, and the position sensor records the current positions of the two baffles, and the baffles are away from each other and at least a gap is reserved for connecting rod loading;

[0060] S33. After the connecting rod is loaded onto the transmission belt, the baffle moves to the recording position of the position sensor and pushes the connecting rod on the transmission belt to move to the specified position. At the same time, the control system detects whether the connecting rod position is normal. If so, it is determined that the current connecting rod has reached the specified position and the connecting rod is processed. Otherwise, it means that the connecting rod position is abnormal, the device stops and notifies the staff for maintenance.

[0061] By arranging a feeding structure 1 and a material transporting structure 4 in the device, and both ends of the feeding structure 1 are provided with a thread rolling structure 2, during the process of processing the connecting rod, the connecting rod can be driven by the feeding device so that both ends of the connecting rod can be threaded through the thread rolling structure 2. Similarly, the above-mentioned device can realize the thread processing on one side of the connecting rod by starting the thread rolling structure 2 on one side. When the device processes both ends of the connecting rod, after controlling the reciprocating movement of the transmission belt 13 by driving the gear set 15, the thread rolling processing on both ends of the connecting rod can be realized. Compared with the traditional processing method of the two ends of the connecting rod, the processing of the two ends of the connecting rod can be completed in one clamping, avoiding the problem of secondary positioning after multiple clamping, improving the overall processing accuracy, omitting the time required for secondary processing and adjustment of positioning, significantly improving the processing efficiency, shortening the time required for processing, and adapting to large-scale production needs.

[0062] Furthermore, in order to improve the processing accuracy of the connecting rod thread rolling processing and improve production efficiency, the feeding structure 1, the material transport structure 4 and the double thread rolling structure 2 cooperate with each other to realize the automatic loading and unloading, precise positioning and double-end thread rolling processing of the connecting rod. The reciprocating motion of the transmission belt 13 combined with the clamping assembly 14 and the positioning assembly ensures the continuous flow of the connecting rod during the processing, reduces manual intervention, and greatly improves production efficiency. At the same time, a thread rolling structure 2 symmetrically distributed on both sides is adopted, and the transmission belt 13 is controlled to move back and forth by driving the gear set 15, so that the connecting rod can complete the thread processing at both ends in one clamping, avoiding the secondary positioning problem after traditional single-end processing, and significantly shortening the overall processing time. In addition, based on the closed-loop feedback control of the pressure sensor and the position sensor, the contact pressure and positioning accuracy of the thread rolling wheel and the connecting rod are monitored in real time, and the displacement of the thread rolling wheel and the processing force are accurately controlled to ensure the consistency of the thread size and improve product quality.

[0063] At the same time, a multi-level intelligent control logic is embedded in the pump device, which monitors the contact pressure between the thread rolling wheel and the connecting rod in real time through a pressure sensor, and detects the positioning accuracy of the connecting rod in combination with a position sensor. When the pressure exceeds the limit (such as P2 ≥ 2P) or the connecting rod position is offset, the control system immediately shuts down and alarms to avoid equipment wear and waste. At the same time, by setting the pressure threshold (such as P, 2P) and the moving distance (such as 1.23h), the displacement of the thread rolling wheel and the processing force are accurately controlled to ensure the integrity of the thread profile and the consistency of the size. This closed-loop control mechanism not only improves the processing accuracy, but also reduces the equipment failure rate and reduces the time and cost of manual troubleshooting.

[0064] In addition, the thread rolling structure 2 and the feeding structure 1 of the present invention adopt a modular design, such as a detachable rotating assembly 3, a driving gear set 15 and a material ejection assembly 41, which facilitates the rapid replacement of worn parts or adjustment of processing parameters. The specific ratio (3:2) between the ejection plate 412 and the connecting rod diameter optimizes the feeding stability and ensures the smooth flow of connecting rods of different specifications. In addition, the staggered design of the processing groove 6 and the dynamic adjustment function of the pressure sensor enable the equipment to adapt to the processing requirements of connecting rods of various specifications, thereby improving the versatility and market competitiveness of the equipment.

[0065] The present invention balances the torque load during the thread rolling process and reduces energy loss through the counter-rotating rotating assembly 3 and the driving motor 153. The pressure sensor dynamically adjusts the output force of the driving cylinder 241 to avoid ineffective work and further reduce energy consumption. At the same time, the fully automated production mode reduces labor costs, and combined with the intelligent fault detection mechanism, reduces equipment maintenance costs and scrap rates. These designs significantly optimize the production cost of each unit product, improve economic benefits, and create higher market value for the company.

[0066] 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. An automatic thread rolling device for a connecting rod, characterized in that: The invention comprises a feeding structure (1) and a thread rolling structure (2) arranged at two ends of the feeding structure (1), wherein the thread rolling structure (2) comprises a fixed thread rolling wheel (21) and a movable thread rolling wheel (22), a processing table (23) is arranged between the movable thread rolling wheel (22) and the fixed thread rolling wheel (21), a driving component (24) is arranged on a side of the movable thread rolling wheel (22) away from the fixed thread rolling wheel (21), and the driving component (24) comprises a driving cylinder (241) and a connecting frame (242) arranged between the driving cylinder (241) and the movable thread rolling wheel (22), The driving cylinder (241) drives the movable thread rolling wheel (22) to move relatively closer to / away from the fixed thread rolling wheel (21) via the connecting frame (242); the feeding structure (1) comprises a sliding frame (11) and a hopper (12) arranged on the sliding frame (11); a transmission belt (13) is arranged on the sliding frame (11); a clamping assembly (14) is arranged on the transmission belt (13); a driving gear set (15) is also arranged at the bottom of the transmission belt (13); and the driving gear set (15) is used to drive the transmission belt (13) to make a reciprocating motion on the sliding frame (11).

2. The automatic thread rolling device for a connecting rod according to claim 1, characterized in that: The thread rolling structure (2) is further provided with a plurality of rotating components (3), wherein the rotating components (3) include a power motor (31) and a rotating main shaft (32) arranged on the power motor (31), and each rotating component (3) is respectively connected to a fixed thread rolling wheel (21) and a movable thread rolling wheel (22), and the rotating component (3) arranged at the end of the fixed thread rolling wheel (21) rotates in the opposite direction to the rotating component (3) arranged at the end of the movable thread rolling wheel (22).

3. The automatic thread rolling device for a connecting rod according to claim 1, characterized in that: A material transport structure (4) is also provided on one side of the sliding frame (11), and the material transport structure (4) comprises a material lifting component (41) arranged in the hopper (12) and a circulation component (42) arranged between the hopper (12) and the sliding frame (11); the material lifting component (41) comprises a connecting rod climbing frame (411) arranged in the hopper (12) and a material lifting plate (412) arranged on the connecting rod climbing frame (411), and the ratio of the width of the material lifting plate (412) to the diameter of the connecting rod is 3:

2.

4. The automatic thread rolling device for a connecting rod according to claim 3, characterized in that: The circulation component (42) comprises a material transport frame (421), a material transport trough (422) arranged on the material transport frame (421), and a material discharge plate (423) arranged at one end of the material transport frame (421) close to the sliding frame (11); the connecting rod in the ejecting component (41) is moved to the sliding frame (11) through the circulation component (42).

5. The automatic thread rolling device for a connecting rod according to claim 2, characterized in that: A transmission assembly (5) is also provided between the power motor (31) and the transmission main shaft, the transmission assembly (5) comprising a driving wheel (51) and a driven wheel (52) transmission-connected to the driving wheel (51), the driving wheel (51) being fixedly connected to the power motor (31), and the driven wheel (52) being fixedly connected to the rotating main shaft (32).

6. The automatic thread rolling device for a connecting rod according to claim 1, characterized in that: The driving gear set (15) comprises a first driving wheel (151) arranged at one end of the transmission belt (13) and a second driving wheel (152) arranged at the other end of the transmission belt (13); a driving motor (153) is provided on the first driving wheel (151) and the second driving wheel (152); and the driving motor (153) corresponding to the first driving wheel (151) and the driving motor (153) corresponding to the second driving wheel (152) rotate in opposite directions.

7. The automatic thread rolling device for a connecting rod according to claim 1, characterized in that: The fixed thread rolling wheel (21) and the movable thread rolling wheel (22) are provided with processing grooves (6), and the processing grooves (6) are configured to abut against the outer surface of the connecting rod and form external threads on the surface of the connecting rod, and the processing grooves (6) on the fixed thread rolling wheel (21) and the processing grooves (6) on the movable thread rolling wheel (22) are arranged in an alternating manner.

8. The automatic thread rolling device for a connecting rod according to claim 1, characterized in that: The fixed thread rolling wheel (21) and the movable thread rolling wheel (22) are both provided with pressure sensors, and the pressure sensors are configured to detect the state of the connecting rod in the thread rolling structure (2). A control system is provided at one end of the pressure sensor. A positioning component is also provided on the transmission belt (13), and the positioning component includes two baffles (7) arranged on the transmission belt (13) and a position sensor arranged on the baffles (7). The position sensor is electrically connected to the control system, and the positioning component is used to fix the specific position of the connecting rod on the transmission belt (13).

9. A control method for an automatic thread rolling device of a connecting rod according to any one of claims 1 to 8, characterized in that: The connecting rod thread rolling method comprises the following steps: S1, starting the device and setting the detection threshold of the pressure sensor to P; S2, the control system detects that before the thread rolling process, the driving cylinder drives the mobile thread rolling wheel to move toward the fixed thread rolling wheel, and sets the maximum moving distance to L. After the mobile thread rolling wheel moves L distance, the pressure sensor is subjected to a pressure range. If the maximum pressure value detected is greater than P, it is determined that the distance between the current mobile thread rolling wheel and the processing table is too close, which may easily cause the surface of the mobile thread rolling wheel to be worn. The device stops and notifies the staff for maintenance. On the contrary, if the maximum pressure value detected is ≤P, it is determined that the current mobile thread rolling wheel is not in contact with the processing table, and jumps to S3 for feeding. S3, the feeding structure and the transporting structure move the connecting rod in the hopper onto the transmission belt, and the positioning component on the transmission belt adjusts the position of the connecting rod on the transmission belt and fixes it through the clamping component; S4, the first driving wheel at one end of the transmission belt rotates and drives the transmission belt to move in the first direction, and at the same time, the connecting rod on the transmission belt moves toward the rolling structure close to one side; S5, the control system detects whether the connecting rod reaches the thread rolling structure. If so, it is determined that the current connecting rod has reached the specified position and jumps to S6 for thread rolling processing. Otherwise, it is determined that the connecting rod has not reached the specified position, the transmission belt continues to move and is detected again; S6, the driving cylinder drives the movable thread rolling wheel to move toward the fixed thread rolling wheel again, and at the same time, the pressure sensor detects the pressure P1 exerted on the fixed thread rolling wheel and the movable thread rolling wheel. If the pressure P1 detected by the pressure sensor is 0, it is determined that the movable thread rolling wheel and the fixed thread rolling wheel are not in contact with the connecting rod, and the driving cylinder continues to drive the movable thread rolling wheel to move toward the fixed thread rolling wheel. On the contrary, if the pressure P1 detected by the pressure sensor is greater than 0, it is determined that the movable thread rolling wheel and the fixed thread rolling wheel are in contact with the connecting rod, and the process jumps to S7 to continue operation. S7. Based on the thread depth h of the external thread of the connecting rod, the control system controls the driving assembly to move the mobile thread rolling wheel toward the fixed thread rolling wheel. The moving distance is 1.23h. The pressure sensor detects the pressure P2 exerted on the mobile thread rolling wheel and the fixed thread rolling wheel during the thread rolling process. If P2≥2P, it is determined that the pressure exerted on the current mobile thread rolling wheel and the fixed thread rolling wheel is too large, the device stops and notifies the staff for maintenance. On the contrary, if P2<2P, it is determined that the device is operating normally, and the connecting rod exits the current thread rolling structure to complete the thread rolling at one end. S8, the second driving wheel at the other end of the transmission belt rotates and drives the transmission belt to move in the second direction, and at the same time, the connecting rod on the transmission belt moves toward the rolling structure on the other side; S9. Repeat steps S5-S7 for the thread rolling structure on the other side to complete the thread rolling process on the current connecting rod. The device discharges the material and jumps back to S3 for further processing.

10. The control method of the automatic thread rolling device of a connecting rod according to claim 9, characterized in that: The step S3 also includes adjusting the position of the connecting rod. The method comprises the following steps: S31, the control system determines the center position of the current transmission belt according to the distance between the rolling structures at both ends of the transmission belt; S32, the position sensor adjusts the positions of the two baffles on the transmission belt according to the current center position of the transmission belt, so that the two baffles are at equal distances from the center of the transmission belt, and the distance between the two baffles is equal to the length of the connecting rod, and the position sensor records the current positions of the two baffles, and the baffles are away from each other and at least a gap is reserved for connecting rod loading; S33. After the connecting rod is loaded onto the transmission belt, the baffle moves to the recording position of the position sensor and pushes the connecting rod on the transmission belt to move to the specified position. At the same time, the control system detects whether the connecting rod position is normal. If so, it is determined that the current connecting rod has reached the specified position and the connecting rod is processed. Otherwise, it means that the connecting rod position is abnormal, the device stops and notifies the staff for maintenance.

Images