Control method for stamping structure of hot forging die provided with reset auxiliary wheel
By introducing an auxiliary wheel device into the hot forging equipment, the problem of energy waste during the upward movement of the slider is solved, efficient energy distribution and stable operation are achieved, and the operating efficiency and reliability of the equipment are improved.
Patent Information
- Application Number
- CN202511009468.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-22
- Publication Date
- 2025-09-23
AI Technical Summary
During the hot die forging process, energy consumption is significantly wasted during the upward movement of the slider, especially in large-tonnage stamping, which leads to energy waste and equipment instability.
When the slider moves to the lowest point, the auxiliary wheel device takes on the upward power of the stamping structure, reducing dependence on the flywheel, using low-power auxiliary wheels for lifting, and optimizing energy distribution and utilization efficiency.
It significantly reduces the overall power consumption of the equipment, improves system stability and equipment life, reduces mechanical shock and vibration, reduces cooling requirements, extends component life, and improves energy utilization efficiency and operating accuracy.
Smart Images
Figure CN120679939A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of hot die forging equipment, and in particular relates to a hot forging die stamping structure control method equipped with a reset auxiliary wheel. Background Art
[0002] Hot die forging is a highly efficient, high-precision metalworking method that heats metal billets and forms them under pressure using precision dies. Combining the advantages of high-temperature plastic deformation with the precision of die forming, it enables the mass production of complex, high-performance forgings. It is an indispensable core technology in modern manufacturing, particularly in the automotive, aerospace, and heavy machinery industries.
[0003] Hot forging presses, the core equipment in the hot forging process, operate by using a flywheel to drive the rotation of a crankshaft, which in turn transmits power to the slider through a connecting rod structure, achieving its reciprocating motion. During the stamping process, the slider reaches its lowest position under the drive of the crankshaft and then returns to its highest position under the continued rotation of the crankshaft, completing a complete stamping cycle. During this cycle, the downward stamping force applied by the slider is provided by the rotation of the crankshaft, while the energy required to return to its initial position is also provided by the crankshaft's rotation. During the stamping process, a higher stamping force is often required during the slider's descent phase, resulting in a higher set value for the kinetic energy required for crankshaft rotation. Given the short duration of a single stamping cycle, crankshaft power is typically not adjusted during both the descent and lift phases. However, the actual power required during the lift phase, when the slider returns to its highest point, is often lower, resulting in significant energy waste during this process. This energy waste becomes more pronounced with larger press tonnages.
[0004] To reduce energy loss during the upward movement of the slider, this application proposes the installation of an auxiliary wheel device within the press. The design concept for this device is that when the slider reaches its lowest point, the flywheel disengages, and the auxiliary wheel takes on the power to propel the stamping structure upward. Based on this design concept, the present invention aims to present a method for controlling the stamping structure of a hot forging die equipped with a reset auxiliary wheel. Summary of the Invention
[0005] The object of the present invention is to provide a hot forging die stamping structure control method equipped with a reset auxiliary wheel to solve the problems raised in the above background technology.
[0006] To achieve the above object, the present invention provides the following technical solutions: A method for controlling a hot forging die stamping structure equipped with a reset auxiliary wheel, wherein the hot forging die stamping structure includes a crankshaft, the crankshaft includes a main journal, a crank arm, a crank pin, a crank arm and a main journal connected in sequence, the cross-sectional radius of the main journal is R1, the total mass of the crankshaft is m1, the cross-sectional radius of the crank pin is R2, and the eccentricity of the crankshaft is R2-R1; a connecting rod is provided at the crank pin of the crankshaft, the total mass of the connecting rod is m2, and the crank pin of the crankshaft is rotatably connected to the connecting rod; a slider is connected to the lower end of the connecting rod Connecting seat, the connecting rod swings inside the slider connecting seat, a stamped slider is provided at the bottom of the slider connecting seat, and the total mass of the slider connecting seat and the stamped slider is m3; an auxiliary drive tooth is provided on the left side of the connecting rod, and correspondingly, an auxiliary wheel is provided on the left side of the slider connecting seat, the radius of the auxiliary wheel is R3, the horizontal distance between the axis of the auxiliary wheel and the axis of the main shaft neck is L, and the vertical distance between the axis of the auxiliary wheel and the axis of the main shaft neck is H. When the connecting rod swings to the left, the auxiliary drive tooth engages with the auxiliary wheel; In the initial position, the crankshaft starts to rotate clockwise, and the connecting rod swings to the right. At this time, the slider connecting seat drives the stamping slider to descend until the stamping slider reaches the lowest point; at this time, the crankshaft loses active power, and the auxiliary drive tooth on the left side of the connecting rod engages with the auxiliary wheel; the auxiliary wheel drives the stamping slider to move up to the highest point.
[0007] Preferably, when the punch slide reaches the lowest end of its stroke, the auxiliary drive tooth engages with the auxiliary wheel; at this time, the circumferential force applied by the auxiliary wheel to the auxiliary drive tooth is represented by F; as the crankshaft and the auxiliary drive tooth move in coordination, the connecting rod swings to the left at an angle of θ; the circumferential force F is adjusted accordingly with changes in the swing angle θ, and its circumferential force coefficient is defined as α; after the flywheel is disengaged, the crankshaft exhibits an upward lifting inertia, and the inertia coefficient is defined as β; α and β are both constant terms; The circumferential force F and the swing angle θ satisfy the following formula: ;
[0008] Among them, the unit of circumferential force F is kN, the unit of θ is °; the units of R1, R2, L, H are m; m1, m 2、 The unit of m3 is kg.
[0009] Preferably, the auxiliary drive teeth are arranged in a concave crescent shape; when the stamping slider is at the lowest point, the auxiliary wheel engages with the top of the auxiliary drive teeth; when the stamping slider is at the highest point, the auxiliary wheel engages with the bottom of the auxiliary drive teeth.
[0010] Preferably, the total mass of the crankshaft is 128 kg, the length of the crankshaft main journal is 2.00 m, the cross-sectional radius is 0.11 m, the cross-sectional radius of the crank pin is 0.09 m, and the crankshaft eccentricity is 0.175 m.
[0011] Preferably, the total mass of the connecting rod is 100 kg; Preferably, the total mass of the stamping slider and the slider connector is 12000 kg. The radius of the auxiliary wheel is 0.25 m, the horizontal distance between the axis of the auxiliary wheel and the axis of the main journal is 0.50 m, and the vertical distance between the axis of the auxiliary wheel and the axis of the main journal is 0.15 m.
[0012] As a preference, the distance between the centers of the two connecting holes of the connecting rod is 0.80m Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides a control method for a hot forging die stamping structure equipped with a reset auxiliary wheel, wherein a flywheel drives a crankshaft to realize power transmission, and then the crankshaft drives a stamping slider through a connecting rod mechanism to perform the forging stamping task; in order to achieve efficient and high-precision stamping effects, the stamping slider needs to apply a large stamping force in the downward stamping stage, while no equivalent power output is required in the upward lifting process; in the upward lifting process of the stamped parts, the dead weight of the stamped parts such as the stamping slider and the connecting rod must be overcome, and considering the rotational inertia of the crankshaft, the power required to be provided by the auxiliary wheel in the lifting process is significantly lower than the newly added gravitational potential energy of the stamped parts; therefore, in the upward lifting stage of the stamped parts, the flywheel is disengaged to reduce the working time of the high-power flywheel, and the low-power auxiliary wheel is used for lifting, thereby effectively reducing the power output of the high-power flywheel, thereby significantly reducing the power consumption of the overall equipment; this design not only optimizes the distribution and utilization efficiency of energy, but also greatly reduces the energy loss during equipment operation. The use of auxiliary wheels reduces the workload on the crankshaft during the lifting phase, thereby improving the stability and service life of the entire system. This method also reduces reliance on the flywheel, allowing the equipment to maintain a low temperature rise during long-term operation, further improving the safety of the working environment and the reliability of the equipment. (2) The present invention provides a control method for a hot forging die stamping structure equipped with a reset auxiliary wheel. During the lifting process of the stamping component, the center of gravity position changes due to the tilt of the angle between the connecting rod and the crankshaft and other components. As the angle between the connecting rod and the crankshaft changes, the circumferential force provided by the auxiliary wheel to the auxiliary drive teeth is also adjusted in real time, thereby ensuring that the stamping component is lifted at a relatively stable speed and state. Compared with large components such as flywheels, the power adjustment of the auxiliary wheel is more convenient. The design of the auxiliary wheel also takes into account the influence of angle changes on force transmission efficiency, and further optimizes the smoothness of the lifting process through fitting calculation and dynamic adjustment of output power. This real-time response mechanism not only reduces mechanical shock and vibration, but also effectively avoids instability caused by center of gravity offset. In addition, the miniaturization of the auxiliary wheel makes it generate less heat during operation, thereby reducing cooling requirements and extending the service life of related components. With this design, the equipment can flexibly switch under different workloads while maintaining high energy efficiency and operating accuracy. (3) The present invention provides a control method for a hot forging die stamping structure equipped with a reset auxiliary wheel. In the process of the flywheel transmitting the function to the crankshaft, its function is limited to the stage when the stamping part performs downward stamping; when the stamping slider reaches the lowest point of its stroke, the connection between the flywheel and the crankshaft will be disconnected; and when the stamping slider reaches the highest point of its stroke again, the flywheel is reconnected to the crankshaft and continues to participate in the stamping process; as a heavy wheel with mass concentrated on the outer edge, the flywheel has an extremely high moment of inertia, and its main function is to store rotational kinetic energy; in the upward stage of the stamping part, since the flywheel does not need to release rotational kinetic energy, the output power of the flywheel can be significantly reduced; compared with the traditional structure where the flywheel intervenes in the lifting of the stamping part, this design can effectively reduce the flywheel drive motor to the flywheel output. power input; through this optimized design, the operating state of the flywheel is more in line with actual needs, thereby improving the efficiency of the entire system; during the downward stage of the stamping component, the rotational kinetic energy stored in the flywheel can be fully utilized to ensure that the stamping process has sufficient power support; and in the upward stage, due to the separation of the flywheel and the crankshaft, the system avoids unnecessary energy loss, further reducing the operating cost of the equipment; in addition, the intermittent connection method of the flywheel also reduces mechanical wear and extends the service life of the flywheel and its related transmission components; this design not only simplifies the control logic, but also significantly improves the reliability and stability of the equipment; at the same time, the power regulation of the flywheel is more flexible, and the output can be dynamically adjusted according to the actual load, thereby achieving more efficient energy utilization and more precise operation control. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 2 A schematic diagram of the state of the punching structure of the present invention during the upward lifting process; Figure 3 This is a schematic structural diagram of the punching structure of the present invention in a state where the punching structure is located at the upper vertex position; In the figure: crankshaft 1; main journal 2; crank arm 3; crank pin 4; connecting rod 5; slider connecting seat 6; stamping slider 7; auxiliary drive gear 8; auxiliary wheel 9. DETAILED DESCRIPTION
[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0015] This embodiment uses the VFP600 hot die forging press produced by Zhejiang Weirong Precision Forging Co., Ltd. as the experimental equipment. The equipment has a stamping capacity of 600 tons, a slider adjustment amount of 10 mm, a slider stroke of 350 mm, a stroke frequency of 45 Spm, and a maximum die height of 560 mm. The relevant technical parameters of the equipment also include: the total mass of the crankshaft is 128 kg, the length of the crankshaft main journal is 2.00 m, the cross-sectional radius is 0.11 m, the cross-sectional radius of the crank pin is 0.09 m, and the crankshaft eccentricity is 0.175 m; the total mass of the connecting rod is 100 kg; the total mass of the stamping slider and the slider connecting seat is 12,000 kg. The radius of the auxiliary wheel is 0.25 m, the horizontal distance between the axis of the auxiliary wheel and the axis of the main journal is 0.50 m, and the vertical distance between the axis of the auxiliary wheel and the axis of the main journal is 0.15 m. The distance between the centers of the two connecting holes of the connecting rod is 0.80 m.
[0016] The hot-forged stamping structure includes a crankshaft 1, which comprises a main journal 2, a crank arm 3, a crank pin 4, and finally the crank arm 3 and main journal 2, which are connected in sequence. A connecting rod 5 is provided at the crank pin 4 of the crankshaft 1, and is rotationally connected to the crank pin 3. A slider connector 6 is connected to the lower end of the connecting rod 5, and the connecting rod 5 is rotationally connected to the slider connector 6, allowing the connecting rod 5 to swing left and right within the slider connector 6. A stamping slider 7 is provided at the bottom of the slider connector 6.
[0017] The position of the stamping slider 7 at the highest point is set as the initial state. At this time, the crankshaft 1 rotates in a clockwise direction, driving the connecting rod 5 to swing to the right, thereby pushing the sliding connecting seat 6, causing the stamping slider 7 to drop until it reaches the lowest point. When the stamping slider 7 reaches the lowest point, the flywheel of the hot forging die press separates from the crankshaft 1, causing the crankshaft 1 to lose power drive. At this time, the auxiliary drive teeth 8 on the left side of the connecting rod 5 engage with the auxiliary wheel 9, and the auxiliary wheel 9 drives the connecting rod 5, the slider connecting seat 6, the stamping slider 7 and other stamping components to rise to the highest point. During the rising process of the stamping component, the auxiliary drive teeth 8 are arranged in a concave crescent shape, and the auxiliary wheel 9 and the auxiliary drive teeth 8 are always engaged. In order to provide stable power support for the rotation of the auxiliary wheel 9 during the rising process of the stamping slider 7, it is ensured that the stamping component can smoothly return to the initial state.
[0018] When the punch slide reaches the lowest point of its travel, the auxiliary drive teeth engage the auxiliary wheel. At this point, the auxiliary wheel exerts a circumferential force on the auxiliary drive teeth, represented by F. As the crankshaft and the auxiliary drive teeth move in concert, the connecting rod swings leftward at an angle of θ. The circumferential force F adjusts accordingly with the swing angle θ, and its circumferential force coefficient is defined as α. After the flywheel is disengaged, the crankshaft exhibits an upward lifting inertia, and this inertia coefficient is defined as β. α and β are both constant terms. The circumferential force F and the swing angle θ satisfy the following formula:
[0019] Among them, the unit of circular force F is kN, g is 10N / kg, the unit of θ is °; the unit of R1, R2, L, H is m; the unit of m1, m2, m3 is kg.
[0020] During the leftward swing of the connecting rod, the leftward swing angle is θ. To ensure that the stamped part is lifted upward at a relatively stable speed, the circumferential force of the auxiliary wheel needs to be adjusted in real time. Table 1 shows several sets of parameters for the swing angle θ and the circumferential force F during the rotation process.
[0021] Table 1 Correspondence between the leftward swing angle θ of the connecting rod and the circumferential force F exerted by the auxiliary wheel on the connecting rod
[0022] According to the data in Table 1, a fitting calculation is performed to obtain a fitting model of the functional relationship between the swing angle θ and the circumferential force F, and the values of the constants α and β are determined to be 1.549 and 1.67 respectively.
[0023] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A method for controlling a hot forging die stamping structure equipped with a reset auxiliary wheel, characterized in that: The hot forging die stamping structure includes a crankshaft, which includes a main journal, a crank arm, a crank pin, a crank arm and a main journal connected in sequence, the cross-sectional radius of the main journal is R1, the total mass of the crankshaft is m1, the cross-sectional radius of the crank pin is R2, and the eccentricity of the crankshaft is R2-R1; a connecting rod is provided at the crank pin of the crankshaft, the total mass of the connecting rod is m2, and the crank pin of the crankshaft is rotatably connected to the connecting rod; the lower end of the connecting rod is connected to a slider connecting seat, and the connecting rod is connected to the slider. The block connecting seat swings internally, a stamped slider is provided at the bottom of the slider connecting seat, and the total mass of the slider connecting seat and the stamped slider is m3; an auxiliary driving tooth is provided on the left side of the connecting rod, and correspondingly, an auxiliary wheel is provided on the left side of the slider connecting seat, and the radius of the auxiliary wheel is R3, the horizontal distance between the axis of the auxiliary wheel and the axis of the main shaft neck is L, and the vertical distance between the axis of the auxiliary wheel and the axis of the main shaft neck is H. When the connecting rod swings left, the auxiliary driving tooth engages with the auxiliary wheel; In the initial position, the crankshaft starts to rotate clockwise, and the connecting rod swings to the right. At this time, the slider connecting seat drives the stamping slider to descend until the stamping slider reaches the lowest point; at this time, the crankshaft loses active power, and the auxiliary drive tooth on the left side of the connecting rod engages with the auxiliary wheel; the auxiliary wheel drives the stamping slider to move up to the highest point.
2. The method for controlling a hot forging die stamping structure equipped with a reset auxiliary wheel according to claim 1, characterized in that: When the punch slide reaches the lowest end of its stroke, the auxiliary drive teeth engage with the auxiliary wheel. At this point, the auxiliary wheel exerts a circumferential force on the auxiliary drive teeth, represented by F. As the crankshaft and the auxiliary drive teeth move in concert, the connecting rod swings leftward at an angle of θ. The circumferential force F adjusts accordingly with the swing angle θ, and its circumferential force coefficient is defined as α. After the flywheel is disengaged, the crankshaft exhibits an upward lifting inertia, and this inertia coefficient is defined as β. Both α and β are constant terms. The circumferential force F and the swing angle θ satisfy the following formula: ； Among them, the unit of circumferential force F is kN, the unit of θ is °; the units of R1, R2, L, H are m; m1, m 2、 The unit of m3 is kg.
3. A method for controlling a hot forging die stamping structure equipped with a reset auxiliary wheel according to claim 1 or 2, characterized in that: The auxiliary drive teeth are arranged in a concave crescent shape; when the stamping slider is at the lowest point, the auxiliary wheel engages with the top of the auxiliary drive teeth; when the stamping slider is at the highest point, the auxiliary wheel engages with the bottom of the auxiliary drive teeth.
4. The method for controlling a hot forging die stamping structure equipped with a reset auxiliary wheel according to claim 2, characterized in that: The total mass of the crankshaft is 128 kg, the length of the crankshaft main journal is 2.00 m, the cross-sectional radius is 0.11 m, the cross-sectional radius of the crank pin is 0.09 m, and the crankshaft eccentricity is 0.175 m.
5. The method for controlling a hot forging die stamping structure equipped with a reset auxiliary wheel according to claim 4, characterized in that: The total mass of the connecting rod is 100 kg.
6. The method for controlling a hot forging die stamping structure equipped with a reset auxiliary wheel according to claim 5, characterized in that: The total mass of the stamping slider and the slider connector is 12,000 kg. The radius of the auxiliary wheel is 0.25 m, the horizontal distance between the axis of the auxiliary wheel and the axis of the main journal is 0.50 m, and the vertical distance between the axis of the auxiliary wheel and the axis of the main journal is 0.15 m.
7. The method for controlling a hot forging die stamping structure equipped with a reset auxiliary wheel according to claim 6, characterized in that: The distance between the centers of the two connecting holes of the connecting rod is 0.80m.