A forming method of a shock-absorbing high-wear-resistance turnover support

Abstract

The application discloses a forming method of a shock-absorbing high-wear-resistance turnover support, which comprises the following steps: adding furnace charge into a crucible in a medium-frequency induction melting device, heating to melt the furnace charge into a solution; spraying and removing impurities, introducing oxygen, argon and nitrogen into the crucible of the medium-frequency induction melting device to spray and remove impurities from the solution in the crucible; finely adjusting the composition of the solution, detecting the composition of the solution in the crucible, and adding a compound containing chromium and titanium into the solution according to the detection result to adjust the chemical composition of the solution; spheroidizing and inoculating, pouring the solution in the medium-frequency induction melting device into a ladle for spheroidizing and inoculating treatment; and pouring, pouring the solution in the ladle, and obtaining the shock-absorbing high-wear-resistance turnover support after cooling. In the design, after the furnace charge is added into the crucible, the crucible in the medium-frequency induction melting device continuously swings at a certain amplitude and frequency, so that the composition of the solution is uniform, and the performance of the formed turnover support can be ensured.

Description

Technical Field

[0001] This invention relates to a method for manufacturing a bracket, and more particularly to a method for forming a shock-absorbing and highly wear-resistant flip bracket, specifically applicable to the manufacture of flip bracket castings. Background Technology

[0002] The automotive tilt bracket is a steel casting. For vehicle comfort, the tilt bracket needs to function as a shock absorber and noise reducer. Simultaneously, for safety, it also needs good wear resistance. Furthermore, as a connecting component in the vehicle, the tilt bracket needs to withstand various temperature environments and possess both high strength and good toughness to prevent deformation or breakage during use. The manufacturing method for metal components like the tilt bracket is typically cast iron. After melting the raw materials, spheroidizing inoculation is performed, followed by casting. During the melting process, if the medium-frequency induction heating melting device does not provide sufficient stirring, metal segregation can occur, resulting in inhomogeneity in the workpiece's microstructure and properties, thus affecting the shock absorption and wear resistance of the finished component. Therefore, a manufacturing method for the tilt bracket is needed to ensure that the tilt bracket workpiece possesses high shock absorption and wear resistance. Summary of the Invention

[0003] The purpose of this invention is to overcome the problem that segregation easily occurs during the casting process of the existing flip bracket, which leads to a decrease in the performance of the workpiece, and to provide a manufacturing method for a shock-absorbing and high-wear-resistant flip bracket.

[0004] To achieve the above objectives, the technical solution of the present invention is:

[0005] A method for molding a shock-absorbing, high-wear-resistant tilting bracket, the method comprising the following steps:

[0006] Step 1, Batching: Start the medium-frequency induction melting device, control the crucible inside the medium-frequency induction melting device to swing back and forth with a certain amplitude and frequency, and at the same time add furnace charge into the crucible inside the medium-frequency induction melting device. The medium-frequency induction melting device heats the furnace charge and melts the furnace charge into a solution.

[0007] Step 2, spraying to remove impurities: Keep the crucible in the medium frequency induction melting device swinging back and forth with a certain amplitude and frequency, and sequentially introduce oxygen, argon and nitrogen into the crucible of the medium frequency induction melting device to spray and remove impurities;

[0008] Step 3: Fine-tune the solution composition: Analyze the composition of the solution in the crucible of the medium-frequency induction melting device, and adjust the chemical composition of the solution based on the test results.

[0009] Step 4: Spheroidization and Incubation

[0010] Impurities on the surface of the solution in the medium-frequency induction melting device are removed. Then, the solution in the medium-frequency induction melting device is poured into a ladle for spheroidizing inoculation treatment.

[0011] Step 5: Pouring:

[0012] The solution in the ladle is poured in and cooled to obtain a shock-absorbing and highly wear-resistant tilting bracket.

[0013] The medium-frequency induction melting device includes a cross-shaped support and a furnace body. An upward-opening crucible is fixedly installed inside the furnace body, and the bottom of the furnace body is fixedly connected to the middle of the cross-shaped support.

[0014] The cross-shaped bracket includes a horizontal rotating shaft and a vertical rotating shaft that are perpendicular to each other. The horizontal rotating shaft and the vertical rotating shaft are integrally formed, and the middle part of the horizontal rotating shaft is connected to the middle part of the vertical rotating shaft.

[0015] In step one, the batching process, controlling the crucible inside the medium-frequency induction melting device to swing back and forth with a certain amplitude and frequency includes the following steps:

[0016] A1. Control the cross-shaped support and the furnace body fixed on it to rotate back and forth around the horizontal axis, with a rotation angle of ±20°, rotating back and forth 10 times per minute, and continuing to rotate for 20 minutes, then proceed to the next step;

[0017] A2. Control the cross-shaped support and the furnace body fixed on it to rotate back and forth around the longitudinal axis, with a rotation angle of ±20°, rotating back and forth 10 times per minute, and continuing to rotate for 20 minutes, then proceed to the next step;

[0018] A3. Control the cross-shaped support and the furnace body fixed on it to rotate back and forth in the horizontal direction with the connection between the horizontal and vertical rotating axes as the center. The rotation angle is ±30°, and the rotation is repeated 10 times per minute for 20 minutes. Then return to step A1.

[0019] The medium-frequency induction melting device also includes a left drive device, a right drive device, a front drive device, and a rear drive device. The left drive device includes two vertical supports, and two parallel horizontal lead screws are arranged between the two vertical supports. The two ends of each horizontal lead screw are rotatably engaged with the two vertical supports. Each horizontal lead screw is provided with a horizontal sliding block that is threadedly engaged with it. Two parallel vertical lead screws are arranged between the two horizontal sliding blocks. The two ends of each vertical lead screw are rotatably engaged with the two horizontal sliding blocks. A vertical sliding block is arranged between the two vertical lead screws. The two sides of the vertical sliding block are threadedly engaged with the two vertical lead screws. A pivot hole is opened in the middle of the vertical sliding block.

[0020] The left drive unit, right drive unit, front drive unit, and rear drive unit have the same structure; one end of the lateral rotating shaft is limited to the rotating shaft hole on the left drive unit, the other end of the lateral rotating shaft is limited to the rotating shaft hole on the right drive unit, one end of the longitudinal rotating shaft is limited to the rotating shaft hole on the front drive unit, and the other end of the longitudinal rotating shaft is limited to the rotating shaft hole on the rear drive unit.

[0021] The diameter of the rotating shaft hole on the left drive device and the diameter of the rotating shaft hole on the right drive device are both larger than the diameter of the transverse rotating shaft.

[0022] The diameter of the pivot hole on the front drive unit and the diameter of the pivot hole on the rear drive unit are both larger than the diameter of the longitudinal pivot.

[0023] The medium-frequency induction melting device also includes an induction furnace shell. The furnace body and the cross-shaped support are both located inside the induction furnace shell. The left drive device, right drive device, front drive device, and rear drive device are all located outside the induction furnace shell. One end of the transverse rotating shaft passes through the left side wall of the induction furnace shell and engages with the rotating shaft hole on the left drive device. The other end of the transverse rotating shaft passes through the right side wall of the induction furnace shell and engages with the rotating shaft hole on the right drive device. One end of the longitudinal rotating shaft passes through the front wall of the induction furnace shell and engages with the rotating shaft hole on the front drive device. The other end of the longitudinal rotating shaft passes through the rear wall of the induction furnace shell and engages with the rotating shaft hole on the rear drive device.

[0024] An induction coil and a magnetic field coil are provided between the outer wall of the furnace body and the inner wall of the induction furnace shell.

[0025] In step one, the batching process, adding furnace charge to the crucible inside the medium-frequency induction melting device includes the following steps:

[0026] B1. After starting the medium frequency induction melting device, when the internal temperature of the crucible of the medium frequency induction melting device reaches 1200 degrees, add quicklime powder to the crucible of the medium frequency induction melting device, and then control the internal temperature of the crucible of the medium frequency induction melting device between 1370-1450 degrees.

[0027] B2. After six minutes, control the internal temperature of the crucible of the medium-frequency induction melting device between 1380-1420℃, and pour cast steel into the crucible of the medium-frequency induction melting device.

[0028] B3. After 40-60 seconds, add the smelting material consisting of scrap steel, recycled material, coke, aluminum powder, boron mud, calcium oxide and slag remover into the crucible of the medium-frequency induction melting device, and control the internal temperature of the crucible of the medium-frequency induction melting device to rise to between 1500-1520℃ to melt the smelting material in the crucible.

[0029] In step two, the spraying and impurity removal process, oxygen, argon, and nitrogen are sequentially introduced into the crucible of the medium-frequency induction melting device for impurity removal, which includes the following steps:

[0030] C1. Keep the crucible in the medium-frequency induction melting device swinging back and forth with a certain amplitude and frequency, while spraying oxygen onto the surface of the solution in the crucible for 16-19 minutes.

[0031] C2. Keep the crucible in the medium-frequency induction melting device swinging back and forth with a certain amplitude and frequency, while spraying argon gas onto the surface of the solution in the crucible for 5 minutes.

[0032] C3. Keep the crucible in the medium-frequency induction melting device swinging back and forth with a certain amplitude and frequency, while spraying nitrogen gas onto the surface of the solution in the crucible for 5 minutes.

[0033] Step three, fine-tuning the solution composition, involves adjusting the chemical composition of the solution based on the test results, including the following steps:

[0034] An alloy containing chromium and titanium is added to the medium-frequency induction melting device, such that the mass of chromium in the solution in the medium-frequency induction melting device accounts for 0.03%-0.07% of the total mass of the melting material, and the mass of titanium (Ti) accounts for 0.03%-0.07% of the total mass of the melting material.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] 1. In the molding method of the shock-absorbing and wear-resistant tilting bracket of the present invention, a cross-shaped bracket is provided at the bottom of the furnace body of the medium-frequency induction melting device. During the melting process, the cross-shaped bracket drives the furnace body to rotate back and forth in different directions. During this process, the crucible inside the furnace also swings, and the solution inside the crucible also shakes regularly, producing a stirring effect on the solution inside the crucible, making the composition of the solution more uniform and avoiding segregation during the melting process. Therefore, in this design, the cross-shaped bracket drives the furnace body and the crucible inside to swing back and forth in different directions, making the composition of the solution more uniform and avoiding segregation during the melting process.

[0037] 2. In the molding method of the shock-absorbing and high-wear-resistant tilting bracket of the present invention, after starting the medium-frequency induction melting device, the crucible inside the device begins to oscillate back and forth with a certain amplitude and frequency. Then, quicklime powder is added to the crucible. Due to the oscillation of the crucible, the quicklime powder inside is stirred, resulting in a uniform distribution and preventing clumping. This allows the quicklime powder to better perform desulfurization and dephosphorization in the subsequent melting process. Therefore, in this design, the oscillation of the crucible inside the medium-frequency induction melting device with a certain amplitude and frequency stirs the quicklime powder added to the crucible, resulting in a uniform distribution and preventing clumping.

[0038] 3. In the molding method of the shock-absorbing and high-wear-resistant tilting bracket of the present invention, oxygen is first introduced into the crucible of the medium-frequency induction melting device to remove impurities. The oxygen reacts with carbon, phosphorus, sulfur and other substances in the solution to reduce the impurity content. Then, argon is introduced into the crucible to remove impurities such as hydrogen, oxygen and nitrogen dissolved in the solution. Finally, nitrogen is introduced into the crucible to further remove impurities in the solution while adjusting the nitrogen content of the solution, thereby improving the strength and low-temperature toughness of the molded workpiece. Therefore, by sequentially introducing oxygen, argon and nitrogen into the crucible of the medium-frequency induction melting device, impurities in the solution can be fully removed, and the nitrogen content of the solution can be adjusted to improve the strength and low-temperature toughness of the molded workpiece.

[0039] 4. In the molding method of the shock-absorbing and wear-resistant tilting support of this invention, an induction coil and a magnetic field coil are arranged between the outer wall of the crucible and the inner wall of the induction furnace shell. The induction coil converts electromagnetic energy into heat energy, melting the metal charge in the crucible. The magnetic field coil generates a magnetic field to electromagnetically stir the solution in the crucible. Simultaneously, during the melting process, the cross-shaped support drives the furnace body to rotate back and forth in different directions, causing the center of the vortex in the stirring flow field to shift constantly. This reduces the concentric rotation of fluid particles during stirring, making the solution composition more uniform and ensuring more complete chemical reactions within the solution during melting. Therefore, in this design, while the magnetic field coil generates a magnetic field to electromagnetically stir the solution in the crucible, the cross-shaped support drives the furnace body to rotate back and forth in different directions, reducing the concentric rotation of fluid particles during stirring, making the solution composition more uniform, and ensuring more complete chemical reactions within the solution during melting. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of the medium-frequency induction melting device in this invention.

[0041] Figure 2 This is a schematic diagram of the cross-shaped support and furnace body rotating in this invention.

[0042] Figure 3 This is a schematic diagram of the left drive device in this invention.

[0043] Figure 4 This is a schematic diagram of the right drive device in this invention.

[0044] Figure 5 This is a schematic diagram of the front drive device in this invention.

[0045] Figure 6 This is a schematic diagram of the rear drive device in this invention.

[0046] In the diagram: Furnace body 2, cross-shaped support 3, horizontal rotating shaft 31, vertical rotating shaft 32, left drive device 41, vertical support 411, horizontal lead screw 412, horizontal sliding block 413, vertical lead screw 414, vertical sliding block 415, right drive device 42, front drive device 43, rear drive device 44. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] See Figures 1 to 6 A method for molding a shock-absorbing, high-wear-resistant tilting bracket, the method comprising the following steps:

[0049] Step 1: Ingredients:

[0050] Start the medium-frequency induction melting device, control the crucible inside the medium-frequency induction melting device to swing back and forth with a certain amplitude and frequency, and at the same time add furnace charge into the crucible inside the medium-frequency induction melting device. The medium-frequency induction melting device heats the furnace charge and melts the furnace charge into a solution.

[0051] Step 2, spraying to remove impurities: Keep the crucible in the medium frequency induction melting device swinging back and forth with a certain amplitude and frequency, and sequentially introduce oxygen, argon and nitrogen into the crucible of the medium frequency induction melting device to spray and remove impurities;

[0052] Step 3: Fine-tune the solution composition:

[0053] The composition of the solution in the crucible of the medium-frequency induction melting device is analyzed, and the chemical composition of the solution is adjusted according to the analysis results.

[0054] Step 4: Spheroidization and Incubation

[0055] Impurities on the surface of the solution in the medium-frequency induction melting device are removed. Then, the solution in the medium-frequency induction melting device is poured into a ladle for spheroidizing inoculation treatment.

[0056] Step 5: Pouring:

[0057] The solution in the ladle is poured into a cavity corresponding to the shape of the flipping bracket. After cooling for 45-90 minutes, a shock-absorbing and highly wear-resistant flipping bracket is obtained.

[0058] During the pouring process, the temperature of the solution in the ladle is maintained between 1310-1400℃, the flow rate of the solution remains constant, and the pouring height is between 80mm-120mm.

[0059] After cooling to obtain the flip-up bracket, it is subjected to heat treatment.

[0060] The heat treatment process is as follows: first, the rotating bracket is heated to 900-960℃ and then cooled in the furnace for high-temperature annealing; then, the rotating bracket is heated to 720-760℃ and then cooled in the furnace for low-temperature annealing to ensure the mechanical properties of the rotating bracket.

[0061] The medium-frequency induction melting device includes a cross-shaped support 3 and a furnace body 2. An upward-opening crucible is fixedly installed inside the furnace body 2, and the bottom of the furnace body 2 is fixedly connected to the middle part of the cross-shaped support 3.

[0062] The furnace body 2 is also provided with an induction coil and a magnetic field coil on its outer periphery. The induction coil is used to heat the metal charge in the crucible, and the magnetic field coil is used to electromagnetically stir the solution in the crucible.

[0063] The cross-shaped bracket 3 includes a horizontal rotating shaft 31 and a vertical rotating shaft 32 that are perpendicular to each other. The horizontal rotating shaft 31 and the vertical rotating shaft 32 are integrally formed, and the middle part of the horizontal rotating shaft 31 is connected to the middle part of the vertical rotating shaft 32.

[0064] The crucible in the medium-frequency induction furnace is made of high-temperature resistant material and is used to hold the metal to be melted. It is set inside the furnace body 2. When the cross-shaped support drives the furnace body 2 to rotate, the crucible rotates back and forth with the furnace body 2 at the same frequency. The external magnetic field in the medium-frequency induction furnace is combined with mechanical oscillation to stir the solution in the crucible, making the composition of the metal solution more uniform and less prone to local high temperature.

[0065] In step one, the batching process, controlling the crucible inside the medium-frequency induction melting device to swing back and forth with a certain amplitude and frequency includes the following steps:

[0066] A1. Control the cross-shaped support 3 and the furnace body 2 fixed on it to rotate back and forth around the horizontal axis 31. The rotation angle is ±20°, and the rotation is repeated 10 times per minute for 20 minutes. Then proceed to the next step.

[0067] A2. Control the cross-shaped support 3 and the furnace body 2 fixed on it to rotate back and forth around the longitudinal axis 32. The rotation angle is ±20°, and the rotation is repeated 10 times per minute for 20 minutes. Then proceed to the next step.

[0068] A3. Control the cross-shaped support 3 and the furnace body 2 fixed on it to rotate back and forth in the horizontal direction with the connection between the horizontal rotating shaft 31 and the vertical rotating shaft 32 as the center. The rotation angle is ±30°, and the rotation is repeated 10 times per minute for 20 minutes. Then return to step A1.

[0069] The medium-frequency induction melting device further includes a left drive device 41, a right drive device 42, a front drive device 43, and a rear drive device 44. The left drive device 41 includes two vertical supports 411, and two parallel horizontal lead screws 412 are arranged between the two vertical supports 411. The two ends of each horizontal lead screw 412 are rotatably engaged with the two vertical supports 411 respectively. Each horizontal lead screw 412 is provided with a horizontal sliding block 413 that is threadedly engaged with it. Two parallel vertical lead screws 414 are arranged between the two horizontal sliding blocks 413. The two ends of each vertical lead screw 414 are rotatably engaged with the two horizontal sliding blocks 413 respectively. A vertical sliding block 415 is arranged between the two vertical lead screws 414. The two sides of each vertical sliding block 415 are threadedly engaged with the two vertical lead screws 414 respectively. A pivot hole is opened in the middle of the vertical sliding block 415.

[0070] The left drive unit 41, right drive unit 42, front drive unit 43, and rear drive unit 44 have the same structure; one end of the lateral rotating shaft 31 is in a limiting fit with the rotating shaft hole on the left drive unit 41, and the other end of the lateral rotating shaft 31 is in a limiting fit with the rotating shaft hole on the right drive unit 42; one end of the longitudinal rotating shaft 32 is in a limiting fit with the rotating shaft hole on the front drive unit 43, and the other end of the longitudinal rotating shaft 32 is in a limiting fit with the rotating shaft hole on the rear drive unit 44.

[0071] The horizontal sliding block 413 can slide horizontally, and the vertical sliding block 415 can slide vertically. By controlling the rotation of the horizontal lead screw 412, the entire assembly consisting of the horizontal sliding block 413, the vertical lead screw 414, and the vertical sliding block 415 can slide horizontally. By controlling the rotation of the vertical lead screw 414, the vertical sliding block 415 can move vertically. When the vertical sliding block 415 moves, the pivot hole located in its middle also moves, thereby driving the horizontal pivot 31 and the longitudinal pivot 32 to move, thus enabling the cross-shaped bracket 3 to rotate in different directions and angles.

[0072] The diameter of the rotating shaft hole on the left drive device 41 and the diameter of the rotating shaft hole on the right drive device 42 are both larger than the diameter of the transverse rotating shaft 31.

[0073] The diameter of the pivot hole on the front drive unit 43 and the diameter of the pivot hole on the rear drive unit 44 are both larger than the diameter of the longitudinal pivot 32.

[0074] The medium-frequency induction melting device also includes an induction furnace shell 1. The furnace body 2 and the cross-shaped support 3 are both located inside the induction furnace shell 1. The left drive device 41, right drive device 42, front drive device 43 and rear drive device 44 are all located outside the induction furnace shell 1. One end of the transverse rotating shaft 31 passes through the left side wall of the induction furnace shell 1 and engages with the rotating shaft hole on the left drive device 41. The other end of the transverse rotating shaft 31 passes through the right side wall of the induction furnace shell 1 and engages with the rotating shaft hole on the right drive device 42. One end of the longitudinal rotating shaft 32 passes through the front wall of the induction furnace shell 1 and engages with the rotating shaft hole on the front drive device 43. The other end of the longitudinal rotating shaft 32 passes through the rear wall of the induction furnace shell 1 and engages with the rotating shaft hole on the rear drive device 44.

[0075] An induction coil and a magnetic field coil are provided between the outer wall of the furnace body 2 and the inner wall of the induction furnace shell 1.

[0076] In step one, the batching process, adding furnace charge to the crucible inside the medium-frequency induction melting device includes the following steps:

[0077] B1. After starting the medium-frequency induction melting device, the internal temperature of the medium-frequency induction melting device rises. When the internal temperature of the crucible of the medium-frequency induction melting device reaches 1200 degrees, quicklime powder is added to the crucible of the medium-frequency induction melting device. Then, the internal temperature of the crucible of the medium-frequency induction melting device is controlled between 1370-1450 degrees. At this time, since the crucible is constantly oscillating back and forth with a certain amplitude and frequency, it plays a certain stirring role on the quicklime in the crucible, so that the quicklime in the crucible can be evenly distributed and not easily clump.

[0078] B2. After six minutes, control the internal temperature of the crucible of the medium-frequency induction melting device between 1380-1420℃, and pour cast steel into the crucible of the medium-frequency induction melting device.

[0079] B3. After 40-60 seconds, add the smelting material, consisting of scrap steel, recycled material, coke, aluminum powder, boron mud, calcium oxide, and slag remover, to the crucible of the medium-frequency induction melting device. Control the internal temperature of the crucible to rise to between 1500-1520℃ to melt the material. After the first addition of scrap steel, allow it to stabilize for 40-60 seconds, then add more smelting material to the crucible. During melting, maintain the temperature inside the crucible between 1500-1520℃.

[0080] In step two, the spraying and impurity removal process, oxygen, argon, and nitrogen are sequentially introduced into the crucible of the medium-frequency induction melting device for impurity removal, which includes the following steps:

[0081] C1. Keep the crucible in the medium-frequency induction melting device swinging back and forth at a certain amplitude and frequency, while spraying oxygen onto the surface of the solution in the crucible of the medium-frequency induction melting device for 16-19 minutes.

[0082] C2. Keep the crucible in the medium-frequency induction melting device swinging back and forth with a certain amplitude and frequency, while spraying argon gas onto the surface of the solution in the crucible of the medium-frequency induction melting device for 5 minutes.

[0083] C3. Keep the crucible in the medium-frequency induction melting device swinging back and forth with a certain amplitude and frequency, while spraying nitrogen gas onto the surface of the solution in the crucible of the medium-frequency induction melting device for 5 minutes.

[0084] After spraying to remove impurities, the mass of phosphorus in the solution in the crucible must not exceed 0.05% of the total mass of the solution.

[0085] Step three, fine-tuning the solution composition, involves adjusting the chemical composition of the solution based on the test results, including the following steps:

[0086] An alloy containing Cr (chromium) and Ti (titanium) is added to the medium-frequency induction melting device, such that the mass of Cr (chromium) in the solution of the medium-frequency induction melting device accounts for 0.03%-0.07% of the total mass of the melting material, and the mass of Ti (titanium) accounts for 0.03%-0.07% of the total mass of the melting material.

[0087] The principle of this invention is explained as follows:

[0088] During the casting process, the solution in the ladle is poured into the cavity corresponding to the shape of the flipping bracket. After the solution cools, a blank or part of the corresponding shape can be obtained.

[0089] After casting to obtain the flip-up bracket workpiece, the workpiece undergoes subsequent heat treatment to ensure its mechanical and machinability properties. At the same time, the workpiece is also polished, ground, and inspected to finally obtain the finished workpiece.

[0090] Example 1:

[0091] A method for molding a shock-absorbing, high-wear-resistant tilting bracket, the method comprising the following steps:

[0092] Step 1: Ingredients:

[0093] Start the medium-frequency induction melting device, control the crucible inside the medium-frequency induction melting device to swing back and forth with a certain amplitude and frequency, and at the same time add furnace charge into the crucible inside the medium-frequency induction melting device. The medium-frequency induction melting device heats the furnace charge and melts the furnace charge into a solution.

[0094] Step 2: Spraying to remove impurities:

[0095] The crucible inside the medium-frequency induction melting device is kept swinging back and forth with a certain amplitude and frequency, and oxygen, argon and nitrogen are sequentially introduced into the crucible of the medium-frequency induction melting device for impurity removal.

[0096] Step 3: Fine-tune the solution composition:

[0097] The composition of the solution in the crucible of the medium-frequency induction melting device is analyzed, and the chemical composition of the solution is adjusted according to the analysis results.

[0098] Step 4: Spheroidization and Incubation

[0099] Impurities on the surface of the solution in the medium-frequency induction melting device are removed. Then, the solution in the medium-frequency induction melting device is poured into a ladle for spheroidizing inoculation treatment.

[0100] Step 5: Pouring:

[0101] The solution in the ladle is poured in and cooled to obtain a shock-absorbing and highly wear-resistant tilting bracket.

[0102] The medium-frequency induction melting device includes a cross-shaped support 3 and a furnace body 2. An upward-opening crucible is fixedly installed inside the furnace body 2, and the bottom of the furnace body 2 is fixedly connected to the middle part of the cross-shaped support 3.

[0103] The cross-shaped bracket 3 includes a horizontal rotating shaft 31 and a vertical rotating shaft 32 that are perpendicular to each other. The horizontal rotating shaft 31 and the vertical rotating shaft 32 are integrally formed, and the middle part of the horizontal rotating shaft 31 is connected to the middle part of the vertical rotating shaft 32.

[0104] In step one, the batching process, controlling the crucible inside the medium-frequency induction melting device to swing back and forth with a certain amplitude and frequency includes the following steps:

[0105] A1. Control the cross-shaped support 3 and the furnace body 2 fixed on it to rotate back and forth around the horizontal axis 31. The rotation angle is ±20°, and the rotation is repeated 10 times per minute for 20 minutes. Then proceed to the next step.

[0106] A2. Control the cross-shaped support 3 and the furnace body 2 fixed on it to rotate back and forth around the longitudinal axis 32. The rotation angle is ±20°, and the rotation is repeated 10 times per minute for 20 minutes. Then proceed to the next step.

[0107] A3. Control the cross-shaped support 3 and the furnace body 2 fixed on it to rotate back and forth in the horizontal direction with the connection between the horizontal rotating shaft 31 and the vertical rotating shaft 32 as the center. The rotation angle is ±30°, and the rotation is repeated 10 times per minute for 20 minutes. Then return to step A1.

[0108] Example 2:

[0109] Example 2 is basically the same as Example 1, except that:

[0110] The medium-frequency induction melting device further includes a left drive device 41, a right drive device 42, a front drive device 43, and a rear drive device 44. The left drive device 41 includes two vertical supports 411, and two parallel horizontal lead screws 412 are arranged between the two vertical supports 411. The two ends of each horizontal lead screw 412 are rotatably engaged with the two vertical supports 411 respectively. Each horizontal lead screw 412 is provided with a horizontal sliding block 413 that is threadedly engaged with it. Two parallel vertical lead screws 414 are arranged between the two horizontal sliding blocks 413. The two ends of each vertical lead screw 414 are rotatably engaged with the two horizontal sliding blocks 413 respectively. A vertical sliding block 415 is arranged between the two vertical lead screws 414. The two sides of each vertical sliding block 415 are threadedly engaged with the two vertical lead screws 414 respectively. A pivot hole is opened in the middle of the vertical sliding block 415.

[0111] The left drive unit 41, right drive unit 42, front drive unit 43 and rear drive unit 44 have the same structure; one end of the lateral rotating shaft 31 is limited to the rotating shaft hole on the left drive unit 41, and the other end of the lateral rotating shaft 31 is limited to the rotating shaft hole on the right drive unit 42; one end of the longitudinal rotating shaft 32 is limited to the rotating shaft hole on the front drive unit 43, and the other end of the longitudinal rotating shaft 32 is limited to the rotating shaft hole on the rear drive unit 44.

[0112] The diameter of the rotating shaft hole on the left drive device 41 and the diameter of the rotating shaft hole on the right drive device 42 are both larger than the diameter of the transverse rotating shaft 31.

[0113] The diameter of the pivot hole on the front drive unit 43 and the diameter of the pivot hole on the rear drive unit 44 are both larger than the diameter of the longitudinal pivot 32.

[0114] The medium-frequency induction melting device also includes an induction furnace shell 1. The furnace body 2 and the cross-shaped support 3 are both located inside the induction furnace shell 1. The left drive device 41, right drive device 42, front drive device 43 and rear drive device 44 are all located outside the induction furnace shell 1. One end of the transverse rotating shaft 31 passes through the left side wall of the induction furnace shell 1 and is engaged with the rotating shaft hole on the left drive device 41. The other end of the transverse rotating shaft 31 passes through the right side wall of the induction furnace shell 1 and is engaged with the rotating shaft hole on the right drive device 42. One end of the longitudinal rotating shaft 32 passes through the front wall of the induction furnace shell 1 and is engaged with the rotating shaft hole on the front drive device 43. The other end of the longitudinal rotating shaft 32 passes through the rear wall of the induction furnace shell 1 and is engaged with the rotating shaft hole on the rear drive device 44.

[0115] An induction coil and a magnetic field coil are provided between the outer wall of the furnace body 2 and the inner wall of the induction furnace shell 1.

[0116] Example 3:

[0117] Example 3 is basically the same as Example 2, except that:

[0118] In step one, the batching process, adding furnace charge to the crucible inside the medium-frequency induction melting device includes the following steps:

[0119] B1. After starting the medium frequency induction melting device, when the internal temperature of the crucible of the medium frequency induction melting device reaches 1200 degrees, add quicklime powder to the crucible of the medium frequency induction melting device, and then control the internal temperature of the crucible of the medium frequency induction melting device between 1370-1450 degrees.

[0120] B2. After six minutes, control the internal temperature of the crucible of the medium-frequency induction melting device between 1380-1420℃, and pour cast steel into the crucible of the medium-frequency induction melting device.

[0121] B3. After 40-60 seconds, add the smelting material, consisting of scrap steel, recycled material, coke, aluminum powder, boron mud, calcium oxide, and slag remover, into the crucible of the medium-frequency induction melting device. Control the internal temperature of the crucible to rise to between 1500-1520℃ to melt the smelting material. Step two, spraying for impurity removal, involves sequentially introducing oxygen, argon, and nitrogen into the crucible of the medium-frequency induction melting device for impurity removal, including the following steps:

[0122] C1. Keep the crucible in the medium-frequency induction melting device swinging back and forth at a certain amplitude and frequency, while spraying oxygen onto the surface of the solution in the crucible of the medium-frequency induction melting device for 16-19 minutes.

[0123] C2. Keep the crucible in the medium-frequency induction melting device swinging back and forth with a certain amplitude and frequency, while spraying argon gas onto the surface of the solution in the crucible of the medium-frequency induction melting device for 5 minutes.

[0124] C3. Keep the crucible in the medium-frequency induction melting device swinging back and forth with a certain amplitude and frequency, while spraying nitrogen gas onto the surface of the solution in the crucible of the medium-frequency induction melting device for 5 minutes.

[0125] Step three, fine-tuning the solution composition, involves adjusting the chemical composition of the solution based on the test results, including the following steps:

[0126] An alloy containing Cr (chromium) and Ti (titanium) is added to the medium-frequency induction melting device, such that the mass of Cr (chromium) in the solution of the medium-frequency induction melting device accounts for 0.03%-0.07% of the total mass of the melting material, and the mass of Ti (titanium) accounts for 0.03%-0.07% of the total mass of the melting material.

[0127] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A method for molding a shock-absorbing and highly wear-resistant tilting bracket, characterized in that: The molding method of the shock-absorbing and high wear-resistant flip bracket includes the following steps: Step 1: Ingredients: Start the medium-frequency induction melting device, control the crucible inside the medium-frequency induction melting device to swing back and forth with a certain amplitude and frequency, and at the same time add furnace charge into the crucible inside the medium-frequency induction melting device. The medium-frequency induction melting device heats the furnace charge and melts the furnace charge into a solution. Step 2: Spraying to remove impurities: The crucible inside the medium-frequency induction melting device is kept swinging back and forth with a certain amplitude and frequency, and oxygen, argon and nitrogen are sequentially introduced into the crucible of the medium-frequency induction melting device for impurity removal. Step 3: Fine-tune the solution composition: The composition of the solution in the crucible of the medium-frequency induction melting device is analyzed, and the chemical composition of the solution is adjusted according to the analysis results. Step 4: Spheroidization and Incubation Impurities on the surface of the solution in the medium-frequency induction melting device are removed. Then, the solution in the medium-frequency induction melting device is poured into a ladle for spheroidizing inoculation treatment. Step 5: Pouring: The solution in the ladle is poured in and cooled to obtain a shock-absorbing and highly wear-resistant tilting bracket. The medium-frequency induction melting device includes a cross-shaped support (3) and a furnace body (2). A crucible with an upward opening is fixedly installed inside the furnace body (2). The bottom of the furnace body (2) is fixedly connected to the middle part of the cross-shaped support (3). The cross-shaped bracket (3) includes a horizontal rotating shaft (31) and a vertical rotating shaft (32) that are perpendicular to each other. The horizontal rotating shaft (31) and the vertical rotating shaft (32) are integrally formed, and the middle part of the horizontal rotating shaft (31) is connected to the middle part of the vertical rotating shaft (32). In step one, the batching process, controlling the crucible inside the medium-frequency induction melting device to swing back and forth with a certain amplitude and frequency includes the following steps: A1. Control the cross-shaped support (3) and the furnace body (2) fixed on it to rotate back and forth around the horizontal axis (31) at an angle of ±20°, rotate back and forth 10 times per minute, and continue to rotate for 20 minutes, then proceed to the next step; A2. Control the cross-shaped support (3) and the furnace body (2) fixed on it to rotate back and forth around the longitudinal axis (32) at an angle of ±20°, rotate back and forth 10 times per minute, and continue to rotate for 20 minutes, and then proceed to the next step; A3. Control the cross-shaped support (3) and the furnace body (2) fixed on it to rotate back and forth in the horizontal direction with the connection of the horizontal rotating shaft (31) and the vertical rotating shaft (32) as the center. The rotation angle is ±30°, and the rotation is repeated 10 times per minute for 20 minutes. Then return to step A1. The medium-frequency induction melting device also includes an induction furnace shell (1), the furnace body (2) and the cross-shaped support (3) are both located inside the induction furnace shell (1), and an induction coil and a magnetic field coil are provided between the outer wall of the furnace body (2) and the inner wall of the induction furnace shell (1).

2. The molding method of a shock-absorbing and high-wear-resistant flip-up bracket according to claim 1, characterized in that: The medium-frequency induction melting device further includes a left drive device (41), a right drive device (42), a front drive device (43), and a rear drive device (44). The left drive device (41) includes two vertical supports (411), and two parallel transverse lead screws (412) are arranged between the two vertical supports (411). The two ends of each transverse lead screw (412) are respectively rotated with the two vertical supports (411), and each transverse lead screw (412) is provided with a threaded connection. A horizontal sliding block (413) is provided, and two parallel vertical screws (414) are provided between the two horizontal sliding blocks (413). The two ends of each vertical screw (414) are respectively rotated with the two horizontal sliding blocks (413). A vertical sliding block (415) is provided between the two vertical screws (414). The two sides of the vertical sliding block (415) are respectively threaded with the two vertical screws (414). A pivot hole is provided in the middle of the vertical sliding block (415). The left drive unit (41), right drive unit (42), front drive unit (43) and rear drive unit (44) have the same structure; one end of the lateral rotating shaft (31) is limited to the rotating shaft hole on the left drive unit (41), the other end of the lateral rotating shaft (31) is limited to the rotating shaft hole on the right drive unit (42), one end of the longitudinal rotating shaft (32) is limited to the rotating shaft hole on the front drive unit (43), and the other end of the longitudinal rotating shaft (32) is limited to the rotating shaft hole on the rear drive unit (44).

3. The molding method of a shock-absorbing and high-wear-resistant flip-up bracket according to claim 2, characterized in that: The diameter of the rotating shaft hole on the left drive device (41) and the diameter of the rotating shaft hole on the right drive device (42) are both greater than the diameter of the transverse rotating shaft (31); The diameter of the pivot hole on the front drive unit (43) and the diameter of the pivot hole on the rear drive unit (44) are both greater than the diameter of the longitudinal pivot (32).

4. The molding method of a shock-absorbing and high-wear-resistant tilting bracket according to claim 3, characterized in that: The left drive device (41), right drive device (42), front drive device (43) and rear drive device (44) are all located outside the induction furnace housing (1). One end of the transverse rotating shaft (31) passes through the left side wall of the induction furnace housing (1) and engages with the rotating shaft hole on the left drive device (41) for a limiting fit. The other end of the transverse rotating shaft (31) passes through the right side wall of the induction furnace housing (1) and engages with the rotating shaft hole on the right drive device (42) for a limiting fit. One end of the longitudinal rotating shaft (32) passes through the front wall of the induction furnace housing (1) and engages with the rotating shaft hole on the front drive device (43) for a limiting fit. The other end of the longitudinal rotating shaft (32) passes through the rear wall of the induction furnace housing (1) and engages with the rotating shaft hole on the rear drive device (44) for a limiting fit.

5. A method for molding a shock-absorbing, high-wear-resistant tilting bracket according to any one of claims 1-4, characterized in that: In step one, the batching process, adding furnace charge to the crucible inside the medium-frequency induction melting device includes the following steps: B1. After starting the medium frequency induction melting device, when the internal temperature of the crucible of the medium frequency induction melting device reaches 1200 degrees, add quicklime powder to the crucible of the medium frequency induction melting device, and then control the internal temperature of the crucible of the medium frequency induction melting device between 1370-1450 degrees. B2. After six minutes, control the internal temperature of the crucible of the medium-frequency induction melting device between 1380-1420℃, and pour cast steel into the crucible of the medium-frequency induction melting device. B3. After 40-60 seconds, add scrap steel, recycled material, coke, aluminum powder, boron mud, calcium oxide and slag remover to the crucible of the medium-frequency induction melting device, and control the internal temperature of the crucible of the medium-frequency induction melting device to rise to between 1500-1520℃, and melt the materials in the crucible.

6. The molding method of a shock-absorbing and high-wear-resistant flip-up bracket according to claim 5, characterized in that: In step two, the spraying and impurity removal process, oxygen, argon, and nitrogen are sequentially introduced into the crucible of the medium-frequency induction melting device for impurity removal, which includes the following steps: C1. Keep the crucible in the medium-frequency induction melting device swinging back and forth with a certain amplitude and frequency, while spraying oxygen onto the surface of the solution in the crucible for 16-19 minutes. C2. Keep the crucible in the medium-frequency induction melting device swinging back and forth with a certain amplitude and frequency, while spraying argon gas onto the surface of the solution in the crucible for 5 minutes. C3. Keep the crucible in the medium-frequency induction melting device swinging back and forth with a certain amplitude and frequency, while spraying nitrogen gas onto the surface of the solution in the crucible for 5 minutes.

7. The molding method of a shock-absorbing and high-wear-resistant flip-up bracket according to claim 6, characterized in that: Step three, fine-tuning the solution composition, involves adjusting the chemical composition of the solution based on the test results, including the following steps: An alloy containing chromium and titanium is added to the medium-frequency induction melting device, such that the mass of chromium in the solution in the medium-frequency induction melting device accounts for 0.03%-0.07% of the total mass of the melting material, and the mass of titanium (Ti) accounts for 0.03%-0.07% of the total mass of the melting material.

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