A high-temperature forging performance simulation device and its use method

Abstract

The present invention relates to a high-temperature forging performance simulation device and its use method. The device, installed between the upper and lower anvils of a forging table, is used to simulate deformation of high-temperature forgings. The device comprises non-ferrous metals, a pin, a horizontal hydraulic cylinder, a vertical hydraulic cylinder, a horizontal nut, a connecting housing, a vertical nut, a horizontal force sensor, a vertical force sensor, a horizontal support, a vertical support, a displacement sensor, a tie rod, and a base. The device is used to simulate deformation and force analysis of forgings during the forging process, thereby improving forging process efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic forging, and in particular to a high-temperature forging performance simulation device and a use method thereof. Background Art

[0002] Regarding forging, the commonly used forging method on the market is hot forging: the metal material is heated to a temperature above the recrystallization temperature and below the solidus, and then pressure processing is performed. The workpiece obtained by hot forging will have better performance, but working in a high-temperature environment is dangerous to both workers and materials. Materials are prone to oxidation at high temperatures, producing oxide scale, which causes surface fouling, poor finish and flatness, and after hot forging is completed, the forging material shrinks during the cooling process, affecting the dimensional accuracy of the forging. If the forging is processed directly without reasonable simulation, there may be a high failure rate, resulting in losses in manpower and financial resources. If the experimental cost can be reduced during experimental simulation and the risk in the processing process can be reduced, it will be of great significance to the forging process. Therefore, it is urgent to develop a high-temperature forging simulation device to explore the deformation law of forgings when the system is working normally. Summary of the Invention

[0003] In response to the above problems, the purpose of the present invention is to provide a high-temperature forging performance simulation device and its use method, which can simulate the forging process of high-temperature forgings in a room temperature environment, and perform controllable bilateral equivalent simulation of processes such as forging drawing through the design of a hydraulic system. At the same time, recording experimental data can effectively explore the deformation laws of forgings under high temperature conditions.

[0004] The technical solution adopted in the present invention is as follows:

[0005] The present invention proposes a high-temperature forging performance simulation device, which is installed between a forging table and a lower anvil plate and is used to perform deformation simulation experiments on high-temperature forgings. The device includes non-ferrous metals, a pin, a horizontal hydraulic cylinder, a vertical hydraulic cylinder, a horizontal nut, a connecting housing, a vertical nut, a horizontal force sensor, a vertical force sensor, a horizontal support, a vertical support, a displacement sensor, a tie rod, and a base.

[0006] There are two horizontal hydraulic cylinders, which are arranged back to back symmetrically in the horizontal direction; the vertical hydraulic cylinder is vertically arranged below the middle of the two horizontal hydraulic cylinders; the vertical support is arranged below the bottom end of the piston rod of the vertical hydraulic cylinder; the base is arranged at the bottom of the vertical support; the vertical force sensor is arranged between the bottom end of the piston rod of the vertical hydraulic cylinder and the vertical support, and is threadedly connected to the bottom end of the piston rod of the vertical hydraulic cylinder through a vertical nut; the horizontal force sensor is respectively connected to the outer end of the piston rod of the horizontal hydraulic cylinders on both sides through horizontal nuts; the connecting shells are respectively fixedly connected to the outside of the horizontal force sensors; the non-ferrous metals are respectively connected to the outer end of the connecting shells through pins; the displacement sensor is a rope-type displacement sensor, which is respectively fixedly connected to the outside of the cylinder barrels of the two horizontal hydraulic cylinders, and the outside of the horizontal nuts on both sides are respectively provided with pull rods with the same height as the rope heads of the displacement sensors.

[0007] A method for using a high-temperature forging performance simulation device, the method comprising the following steps:

[0008] Step 1: Control the vertical hydraulic cylinder to extend so that the corresponding hydraulic system enters the pressure maintaining stage;

[0009] Step 2: Control the hydraulic press to press down so that the piston rod of the vertical hydraulic cylinder retracts and the oil enters the horizontal hydraulic cylinder through a certain circuit;

[0010] Step 3: The two horizontal hydraulic cylinders are controlled by hydraulic components to achieve independent movement, and the piston rods of the hydraulic cylinders are extended to simulate the deformation of the forging in the horizontal direction;

[0011] Step 4: Under the constraints of the piston rod and the clamping end, the force sensor is extended by the piston rod to apply force to the force sensor and output experimental data;

[0012] Step 5: Control the piston rod of the horizontal hydraulic cylinder to extend, pull the displacement sensor, and the sensor outputs the piston rod movement distance to simulate the deformation of the high-temperature forging during the forging process;

[0013] Step 6: After the experiment is completed, control the hydraulic circuit to retract the piston rod;

[0014] Step 7. Record and organize the experimental data, and analyze the deformation law of the forging during the forging process and the stress conditions at both ends.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention proposes a high-temperature forging performance simulation device and a method for using the same. Output data from a pressure sensor and a displacement sensor can be used to analyze the elongation law and stress conditions of the clamping end during the forging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 yes Figure 1 Schematic diagram of the local cross-section structure;

[0019] Figure 3 yes Figure 1 Schematic diagram of the top view structure;

[0020] Figure 4 yes Figure 1 A side structural diagram of

[0021] Figure 5 It is a schematic diagram of the valve control system.

[0022] Among them, the figure marks are: 1-non-ferrous metal, 2-pin, 3-connecting housing, 4-horizontal support, 5-horizontal force sensor, 6-horizontal nut, 7-piston rod, 8-horizontal cylinder head, 9-vertical cylinder head, 10-vertical nut, 11-vertical force sensor, 12-vertical support, 13-base, 14-cylinder, 15-displacement sensor, 16-pull rod; 17-piston. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] It should be noted that in the description of the present invention, it should be noted that the terms "up", "down", "top", "bottom", "one side", "the other side", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0025] See attached Figures 1 to 4 The detailed structure of an embodiment of a high-temperature forging performance simulation device proposed in this invention is presented. The device is installed between the upper and lower anvils of a forging table and is used to simulate deformation of high-temperature forgings. The device specifically includes a non-ferrous metal 1, a pin 2, a connecting housing 3, a horizontal support 4, a horizontal force sensor 5, a horizontal hydraulic cylinder, a vertical hydraulic cylinder, a horizontal nut 6, a vertical nut 10, a vertical force sensor 11, a vertical support 12, a base 13, a displacement sensor 15, and a pull rod 16.

[0026] In the present invention, there are two horizontal hydraulic cylinders, which are arranged symmetrically in the horizontal direction. The horizontal hydraulic cylinders are composed of components such as a piston rod 7, a horizontal cylinder cover 8, a cylinder barrel 14 and a piston 17. The load borne by the piston rod 7 when it is extended should be the resistance of the forging during deformation. After a simple calculation, the stroke of the piston rod 7 is used as the maximum deformation distance of the forging. The cylinder barrels 14 of the two horizontal hydraulic cylinders are an integral part, and an oil port is set at the top for oil supply. The horizontal hydraulic cylinder is a valve-controlled hydraulic cylinder, which uses PID feedback to control the displacement of the valve core of the servo valve, and then controls the displacement of the piston rod 7 of the horizontal hydraulic cylinder. Its control principle is as follows: Figure 5 As shown. The horizontal force sensor 5 is connected to the outer end of the piston rod 7 of the horizontal hydraulic cylinder on both sides via a horizontal nut 6. The connecting housing 3 is fixedly connected to the outer side of the horizontal force sensor 5. The horizontal force sensor 5 is used to measure the clamping force during the forging process. According to calculations, the force applied to the forging during deformation in the horizontal direction is approximately 4.5t, so the pressure sensor's range can be greater than this value. In this embodiment, the displacement sensor 15 is a conventional pull-wire displacement sensor used to measure the movement distance of the piston rod 7. It is fixedly connected to the outer wall of the cylinder barrel 14 of the two horizontal hydraulic cylinders via a mounting platform. A pull rod 16 is provided on the outside of the horizontal nut 6 on both sides, and the height of the rope head of the displacement sensor 15 is consistent. The head of the pull-wire displacement sensor is fixed to the pull rod 16. The height of the pull rod 16 is simply calculated to be consistent with the height of the rope head of the displacement sensor 15. This ensures that the rope head of the displacement sensor 15 remains perpendicular to the outlet when the rope is pulled, that is, the rope remains horizontal, improving measurement accuracy and reducing wear on the pull-wire displacement sensor. The displacement sensor 15 is used to measure the displacement of the hydraulic cylinder piston rod 7, and the recorded data provides a reference basis for the control of the forging manipulator.

[0027] The vertical hydraulic cylinder is vertically arranged below the middle of the two horizontal hydraulic cylinders. The vertical support is arranged below the bottom end of the piston rod of the vertical hydraulic cylinder and is also composed of components such as the piston rod 7, the vertical cylinder head 9, the cylinder barrel 14, and the piston 17. The base 13 is fixed to the bottom of the vertical support 12. The vertical force sensor 11 is arranged between the bottom end of the piston rod 7 of the vertical hydraulic cylinder and the vertical support 12, and is threadedly connected to the bottom end of the piston rod of the vertical hydraulic cylinder through the vertical nut 10. The pressure exerted on the vertical hydraulic cylinder is the pressure provided by the forging hydraulic press. After being subjected to the pressure, the piston rod 7 retracts, and its stroke is the difference between the diameters of the forging before and after forging. The oil port is arranged on the back of the cylinder barrel 14.

[0028] The hydraulic cylinder piston rod and cylinder cover, piston and cylinder barrel, and cylinder cover and cylinder barrel are all provided with sealing devices and guiding devices. The cylinder cover and cylinder body are connected by bolts, and the piston and piston rod are connected by threads.

[0029] The nonferrous metal 1 is connected to the outer end of the connecting housing 3 via pins 2. During the experiment, a force sensor was used to detect the force relationship between the clamped end of the forging (the nonferrous metal 1) and the clamping end of the manipulator. The nonferrous metal 1 was made of a material with a deformation resistance comparable to that of the forging, and the force distortion of the jaws at high temperatures was investigated.

[0030] The two horizontal hydraulic cylinders and the vertical hydraulic cylinder are controlled separately to simulate the drawing in the horizontal directions and the upsetting in the vertical direction of the forging.

[0031] The method for using the device of the present invention specifically comprises the following steps:

[0032] Step 1: Control the vertical hydraulic cylinder to extend, and the center position function of the reversing valve in the control circuit enables the corresponding hydraulic system to enter the pressure holding stage;

[0033] Step 2: Control the hydraulic press to press down so that the piston rod of the vertical hydraulic cylinder retracts and the oil enters the horizontal hydraulic cylinder through a certain circuit;

[0034] Step 3: The two horizontal hydraulic cylinders are controlled by hydraulic components to achieve independent movement, and the piston rods of the hydraulic cylinders are extended to simulate the deformation of the forging in the horizontal direction;

[0035] Step 4: The force sensor is constrained by the piston rod and the clamping end. The piston rod moves to cause the force sensor to be subjected to force and output experimental data.

[0036] Step 5: Control the piston rod of the horizontal hydraulic cylinder to extend, pull the displacement sensor, and the sensor outputs the piston rod movement distance to simulate the deformation of the high-temperature forging during the forging process;

[0037] Step 6: After the experiment is completed, control the hydraulic circuit to retract the piston rod;

[0038] Step 7. Record and organize the experimental data, and analyze the deformation law of the forging during the forging process and the stress conditions at both ends.

[0039] Matters not covered in the present invention are all known technologies.

[0040] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A high-temperature forging performance simulation device, which is installed between the forging table and the lower anvil, and is used to perform deformation simulation experiments on high-temperature forgings, characterized by: The device includes non-ferrous metal, a pin, a horizontal hydraulic cylinder, a vertical hydraulic cylinder, a horizontal nut, a connecting housing, a vertical nut, a horizontal force sensor, a vertical force sensor, a horizontal support, a vertical support, a displacement sensor, a pull rod and a base; There are two horizontal hydraulic cylinders, which are arranged back to back symmetrically in the horizontal direction; the vertical hydraulic cylinder is vertically arranged below the middle of the two horizontal hydraulic cylinders; the vertical support is arranged below the bottom end of the piston rod of the vertical hydraulic cylinder; the base is arranged at the bottom of the vertical support; the vertical force sensor is arranged between the bottom end of the piston rod of the vertical hydraulic cylinder and the vertical support, and is threadedly connected to the bottom end of the piston rod of the vertical hydraulic cylinder through a vertical nut; the horizontal force sensor is respectively connected to the outer ends of the piston rods of the horizontal hydraulic cylinders on both sides through horizontal nuts; the connecting shells are respectively fixedly connected to the outside of the horizontal force sensors; the non-ferrous metals are respectively connected to the outer ends of the connecting shells through pins; the displacement sensor is a rope-type displacement sensor, which is respectively fixedly connected to the outside of the cylinder barrels of the two horizontal hydraulic cylinders, and the outsides of the horizontal nuts on both sides are respectively provided with pull rods with the same height as the rope heads of the displacement sensors; The horizontal hydraulic cylinders are composed of a piston rod, a horizontal cylinder head, a cylinder barrel and a piston. The load borne by the extended piston rod should be the resistance of the forging during deformation, and the stroke of the piston rod is used as the maximum deformation distance of the forging; the cylinder barrels of the two horizontal hydraulic cylinders are an integral part, and an oil port is provided on the upper part for oil supply; the horizontal hydraulic cylinder is a valve-controlled hydraulic cylinder, which uses PID feedback to control the valve core displacement of the servo valve, and then controls the piston rod displacement of the horizontal hydraulic cylinder; the horizontal force sensor is used to measure the clamping force during the forging process; the displacement sensor is used to measure the movement distance of the piston rod, and the head of the pull-rod displacement sensor is fixed on the pull rod. The height of the pull rod is consistent with the height of the rope head of the displacement sensor to ensure that the rope head of the displacement sensor remains vertical to the outlet when the rope is pulled.

2. The method for using a high temperature forging performance simulation device according to claim 1, characterized in that: The method comprises the following steps: Step 1: Control the vertical hydraulic cylinder to extend so that the corresponding hydraulic system enters the pressure holding stage; Step 2: Control the hydraulic press to press down so that the piston rod of the vertical hydraulic cylinder retracts and the oil enters the horizontal hydraulic cylinder through a certain circuit; Step 3: The two horizontal hydraulic cylinders are controlled by hydraulic components to achieve independent movement, and the piston rods of the hydraulic cylinders are extended to simulate the deformation of the forging in the horizontal direction; Step 4: Under the constraints of the piston rod and the clamping end, the force sensor is extended by the piston rod to apply force to the force sensor and output experimental data; Step 5: Control the piston rod of the horizontal hydraulic cylinder to extend, pull the displacement sensor, and the sensor outputs the piston rod movement distance to simulate the deformation of the high-temperature forging during the forging process; Step 6: After the experiment is completed, control the hydraulic circuit to retract the piston rod; Step 7. Record and organize the experimental data, and analyze the deformation law of the forging during the forging process and the stress conditions at both ends.

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