Stabilizer bar induction quenching system and quenching method based on dual robot collaborative work

Abstract

The present invention discloses an induction quenching system and a quenching method for a stabilizer bar based on the collaborative work of two robots. The induction quenching system for the stabilizer bar comprises a first robot, a second robot, a robot controller and a quenching controller; a stabilizer bar clamping device is provided at the end of the first robot, a quenching coil assembly is provided at the end of the second robot, and the robot controller is used to control the work of the first robot and the second robot; the quenching controller is communicatively connected with the robot controller. The stabilizer bar clamping device of the present invention is provided with a first quenching liquid injector and a second quenching liquid injector, which can supplement cooling of the stabilizer bar corner that first passes through the induction heating coil and a section of the stabilizer bar on the middle part of the stabilizer bar near another corner of the stabilizer bar, thereby solving the problems of insufficient hardenability and low strength of these two parts in the prior art and improving the product quality of the stabilizer bar.

Description

Technical Field

[0001] The invention relates to a quenching technology for a stabilizer bar. Background Art

[0002] The induction quenching system for the stabilizer bar based on the collaborative work of two robots mainly includes a first robot, a second robot, a robot controller and a quenching controller. Among them, a stabilizer bar clamping device is provided at the end of the first robot, and a quenching coil assembly is provided at the end of the second robot. The robot controller controls the first robot and the second robot to work collaboratively so that the stabilizer bar passes through the quenching coil assembly. The quenching controller is connected to the robot controller in communication to control the work of the quenching coil assembly to achieve induction heating of the stabilizer bar and spraying of quenching liquid.

[0003] Although the existing dual-robot collaborative stabilizer bar induction quenching system has the advantages of high automation and high work efficiency, it still needs further improvement in terms of improving product quenching quality and simplifying product structure. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a stabilizer bar induction quenching system and method based on the collaborative work of two robots, which can improve the quenching quality of the stabilizer bar.

[0005] One aspect of an embodiment of the present invention provides a stabilizer bar induction quenching system based on the collaborative work of two robots, including a first robot, a second robot, a robot controller and a quenching controller; a stabilizer bar clamping device is provided at the end of the first robot, a quenching coil assembly is provided at the end of the second robot, and the robot controller is used to control the work of the first robot and the second robot; the quenching controller is communicatively connected with the robot controller; its characteristics are that the stabilizer bar clamping device includes a base, a pair of first jaws, a first jaw driving mechanism, a pair of second jaws, a second jaw driving mechanism, a first quenching liquid injector and a second quenching liquid injector; the first jaw driving mechanism, the second jaw driving mechanism, the first quenching liquid injector and the second quenching liquid injector are respectively fixed on the base, and the first jaw driving mechanism is respectively connected to the pair of first jaws for driving A pair of first jaws opens and closes, and a second jaw driving mechanism is respectively connected to a pair of second jaws to drive the pair of second jaws to open and close; the first quenching liquid injector is used to apply quenching liquid to one of the corners of the stabilizer bar, and the second quenching liquid injector is used to apply quenching liquid to a section of the middle rod of the stabilizer bar near another corner of the stabilizer bar; the quenching coil assembly includes an induction heating coil and a quenching liquid spray sleeve, the quenching liquid spray sleeve is arranged outside the induction heating coil, and the inner wall of the quenching liquid spray sleeve is connected to the outer wall of the induction heating coil; a plurality of spray holes are provided at the bottom of the quenching liquid spray sleeve, and the plurality of spray holes are located below the bottom surface of the induction heating coil; the quenching controller is used to control the operation of the first jaw driving mechanism, the second jaw driving mechanism, the induction heating coil, the quenching liquid spray sleeve, the first quenching liquid injector and the second quenching liquid injector.

[0006] Another aspect of an embodiment of the present invention provides a quenching method of a stabilizer bar induction quenching system, comprising the following steps:

[0007] Clamp the stabilizer bar to be quenched on the stabilizer bar clamping device, and make one corner of the stabilizer bar to be quenched face the first quenching liquid injector, and make a section of the middle part of the stabilizer bar near the other corner of the stabilizer bar face the second quenching liquid injector;

[0008] The robot controller controls the first robot and the second robot to work in coordination, so that the stabilizer bar passes through the induction heating coil in a manner in which one corner thereof passes before the other corner; in the process of the stabilizer bar passing through the induction heating coil, the quenching controller controls the induction heating coil to continue heating, controls the quenching liquid spray sleeve to continue spraying quenching liquid onto the stabilizer bar, and, immediately after one of the corners passes through the induction heating coil, controls the first quenching liquid injector to spray quenching liquid onto one of the corners; and immediately after a section of the middle shaft of the stabilizer bar near another corner of the stabilizer bar passes through the induction heating coil, controls the second quenching liquid injector to spray quenching liquid onto a section of the middle shaft of the stabilizer bar near another corner of the stabilizer bar.

[0009] The present invention has at least the following advantages:

[0010] 1. The stabilizer bar clamping device of the embodiment of the present invention is provided with a first quenching liquid injector and a second quenching liquid injector, which can supplement cooling of the stabilizer bar corner that first passes through the induction heating coil and a section of the stabilizer bar in the middle of the stabilizer bar near another corner of the stabilizer bar, thereby solving the problems of insufficient hardenability and low strength of these two parts in the prior art and improving the product quality of the stabilizer bar;

[0011] 2. The embodiment of the present invention connects the induction heating coil with the quenching liquid spray sleeve, which not only simplifies the structure, but also shortens the time between each part of the stabilizer bar being heated and sprayed with quenching liquid, thereby improving the quenching quality of the stabilizer bar;

[0012] 3. The embodiment of the present invention has a simple and compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The overall structural schematic diagram of the stabilizer bar induction quenching system according to an embodiment of the present invention is shown.

[0014] Figures 2 to 4 A three-dimensional schematic diagram, a front schematic diagram and a bottom schematic diagram of a stabilizer bar clamping device according to an embodiment of the present invention are respectively shown.

[0015] Figure 5 and Figure 6 A three-dimensional schematic diagram and a bottom view schematic diagram of a quenching coil assembly according to an embodiment of the present invention are respectively shown.

[0016] Figure 7 Shows Figure 6 AA cross-section diagram of .

[0017] Figure 8 A control block diagram of a quenching controller according to an embodiment of the present invention is shown.

[0018] Figures 9 to 14 The schematic diagram of the process of quenching a stabilizer bar by an induction heating coil according to an embodiment of the present invention is schematically shown. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] See also Figures 1 to 8 The stabilizer bar induction quenching system based on dual robot collaboration according to an embodiment of the present invention comprises a first robot 1, a second robot 2, a robot controller 3, a quenching controller 4, a stabilizer bar clamping device 5, a quenching coil assembly 6 and a quenching liquid circulation device 7.

[0021] The stabilizer bar clamping device 5 is arranged at the end of the first robot 1. The stabilizer bar clamping device includes a base 50, a pair of first clamping jaws 51, a first clamping jaw driving mechanism, a pair of second clamping jaws 52, a second clamping jaw driving mechanism, a first quenching liquid injector 55 and a second quenching liquid injector 56. The first clamping jaw driving mechanism, the second clamping jaw driving mechanism, the first quenching liquid injector 55 and the second quenching liquid injector 56 are respectively fixed on the base 50, and the base 50 is connected to the end flange of the first robot 1. The first clamping jaw driving mechanism is respectively connected to the pair of first clamping jaws 51, and is used to drive the pair of first clamping jaws 51 to open and close, and the second clamping jaw driving mechanism is respectively connected to the pair of second clamping jaws 52, and is used to drive the pair of second clamping jaws 52 to open and close.

[0022] In this embodiment, the base 50 is provided with a first guide rail 501 and a second guide rail 502. A pair of first clamping jaws 51 are respectively provided with a first slider 511, which are slidably arranged on the first guide rail 501 through the first slider 511. The first clamping jaw driving mechanism includes a first double-rod cylinder 53, which is respectively connected to the pair of first clamping jaws 51. A pair of second clamping jaws 52 are respectively provided with a second slider 521, which are slidably arranged on the second guide rail 502 through the second slider 521. The second clamping jaw driving mechanism includes a second double-rod cylinder 54, which is respectively connected to the pair of second clamping jaws 52.

[0023] The first quenching liquid injector 55 is used to apply the quenching liquid to one of the corners of the stabilizer bar 10, and the second quenching liquid injector 56 is used to apply the quenching liquid to a section of the middle part of the stabilizer bar near another corner of the stabilizer bar. The bottom surface of the first quenching liquid injector 55 is provided with a plurality of spray holes 551, and the bottom surface of the second quenching liquid injector 56 is provided with a plurality of spray holes 561. The plurality of spray holes 551 and the plurality of spray holes 561 both include a plurality of rows of spray holes arranged in a radial direction. This radial arrangement can spray the quenching liquid to a predetermined position in a targeted manner. Optionally, the plurality of rows of spray holes are evenly spaced along the circumferential direction.

[0024] The quenching coil assembly 6 is disposed at the end of the second robot 2 . The quenching coil assembly 6 includes an induction heating coil 61 , a quenching liquid spray sleeve 62 , a secondary transformer 63 and a conductive member 64 .

[0025] The quenching liquid spray sleeve 62 is sleeved outside the induction heating coil 61, and the inner wall of the quenching liquid spray sleeve 62 is connected to the outer wall of the induction heating coil 61. Optionally, the inner wall of the quenching liquid spray sleeve 62 is welded to the outer wall of the induction heating coil 61, and preferably, the inner wall of the quenching liquid spray sleeve 62 is welded to the outer wall of the induction heating coil 61 by argon arc welding. The bottom of the quenching liquid spray sleeve 62 is provided with a plurality of spray holes 621, and the plurality of spray holes 621 are located below the bottom surface of the induction heating coil 61 to ensure that the quenching liquid can be applied to the part of the stabilizing rod that has just been heated. In this embodiment, the bottom of the quenching liquid spray sleeve 62 is provided with a conical hole 620, and the plurality of spray holes 621 are arranged on the hole wall of the conical hole 620, and the plurality of spray holes 621 include at least two groups of spray holes arranged in an annular shape, and the annular arrangement is for uniformly applying the quenching liquid.

[0026] The secondary transformer 63 is fixed to the end of the second robot 2. In this embodiment, the end flange of the second robot 2 is connected to the transformer mounting plate 65 by bolts, and the secondary transformer 63 is fixed to the transformer mounting plate 65. The input end of the secondary transformer 63 is connected to the power supply cabinet 9 through two cables. The power supply cabinet 9 is used to transmit the current generated by the primary transformer to the secondary transformer 63. One end of the conductive member 64 is connected to the output end of the secondary transformer 63, and the other end of the conductive member 64 is connected to the induction heating coil 61 to supply power to the induction heating coil 61.

[0027] The conductive member 64 and the induction heating coil 61 are both hollow structures, and the inner cavity of the conductive member 64 is connected to the inner cavity of the induction heating coil 61; the conductive member 64 is provided with a liquid inlet joint 641 for introducing a cooling liquid (such as cooling water) into the inner cavity of the conductive member and a liquid outlet joint 642 for leading the cooling liquid in the inner cavity of the conductive member out. After the cooling structure is provided, it can be ensured that the induction heating coil 61 will not be deformed or burned under high temperature conditions.

[0028] The induction heating coil 61 is used to induction heat the stabilizer bar product, and the quenching liquid spray sleeve 62 is used to spray the quenching liquid onto the surface of the stabilizer bar heated to a high temperature state for rapid cooling, so that the metallographic structure of the product is quickly transformed into a martensite state and the hardness of the product is improved. The secondary transformer 63 is used to convert the low current output by the primary transformer into the high current required by the induction heating coil 61, so that the induction heating coil 61 generates an induced magnetic field. When the stabilizer bar 10 passes through the induction heating coil 61, an induced electromotive force and an induced current are generated due to the cutting of the magnetic lines of force, and the high temperature thermal effect of the induced current is used to heat the stabilizer bar to about 900°C.

[0029] The robot controller 3 is used to control the operation of the first robot 1 and the second robot 2. The quenching controller 4 is connected to the robot controller 3 in communication, so as to obtain information related to the moving position of the stabilizer bar 10.

[0030] The quenching controller 4 is used to control the operation of the first double-rod cylinder 53 of the first jaw driving mechanism, the second double-rod cylinder 54 of the second jaw driving mechanism, the induction heating coil 61, the quenching liquid spraying sleeve 62, the first quenching liquid injector 55 and the second quenching liquid injector 56. Optionally, the quenching controller 4 is a PLC controller.

[0031] Specifically, the air intake of the first double-rod cylinder 53 and the second double-rod cylinder 54 is controlled by a solenoid valve, the energization of the induction heating coil 61 is controlled by a power switch, and the quenching liquid inlet of the quenching liquid spray sleeve 62, the first quenching liquid injector 55 and the second quenching liquid injector 56 is also controlled by a solenoid valve. The quenching controller 4 controls the operation of the first double-rod cylinder 53, the second double-rod cylinder 54, the induction heating coil 61, the quenching liquid spray sleeve 62, the first quenching liquid injector 55 and the second quenching liquid injector 56 by controlling the on and off of the above-mentioned solenoid valves and the power switch.

[0032] In this embodiment, the stabilizer bar clamping device includes a first control valve 571 and a second control valve 572; the first control valve 571 is arranged on a first liquid supply pipe 573 connected to the first quenching liquid injector 55, and the second control valve 572 is arranged on a second liquid supply pipe 574 connected to the second quenching liquid injector 56. The first output end and the second output end of the robot controller 3 are electrically connected to the control input end of the first control valve 571 and the control input end of the second control valve 572, respectively. The quenching controller 4 controls whether the first quenching liquid injector 55 and the second quenching liquid injector 56 are working by controlling the on and off of the first control valve 571 and the second control valve 572.

[0033] Furthermore, the stabilizer bar clamping device includes a water distributor 58, which is fixed to the base 50 and is respectively connected to the first liquid supply pipeline 573 and the second liquid supply pipeline 574. The water distributor 58 is connected to the quenching liquid tank, and divides the received quenching liquid into two paths, which are respectively delivered to the first quenching liquid injector 55 and the second quenching liquid injector 56.

[0034] The quenching liquid circulation device 7 is used to collect the quenching liquid sprayed from the quenching liquid spraying sleeve 62, the first quenching liquid injector 55 and the second quenching liquid injector 56, and circulate it through a pump and a pipeline.

[0035] The inventor of the present application has found in practice that the existing stabilizer bar induction quenching system based on the collaborative work of two robots is limited by the shape of the stabilizer bar and the cooling capacity of the quenching liquid spray sleeve. After quenching, the stabilizer bar corner that first passes through the induction heating coil and a section of the stabilizer bar near another corner of the stabilizer bar in the middle of the stabilizer bar will have problems of insufficient hardenability and low strength. The stabilizer bar clamping device of the embodiment of the present invention is provided with a first quenching liquid injector and a second quenching liquid injector, which can supplement the cooling of the stabilizer bar corner that first passes through the induction heating coil and a section of the stabilizer bar near another corner of the stabilizer bar in the middle of the stabilizer bar, solving the problems of insufficient hardenability and low strength of these two parts in the prior art and improving the product quality of the stabilizer bar.

[0036] Figures 9 to 14 The schematic diagram shows a process of quenching a stabilizer bar by an induction heating coil according to an embodiment of the present invention. Figures 9 to 12 In the figure, the second robot 2 (induction heating coil) remains stationary), and for ease of understanding, the quenching coil assembly is shown from different angles in the figure. Fig.13 and Fig.14 In the embodiment, the second robot 2 (induction heating coil) cooperates with the first robot 1 to move so that the second corner of the stabilizer bar product can pass through the induction heating coil.

[0037] Combination Figure 3 , Figures 9 to 14 As shown, the quenching process of the stabilizer bar induction quenching system according to an embodiment of the present invention is roughly as follows.

[0038] like Figure 3 As shown, the stabilizer bar 10 to be quenched is clamped on the stabilizer bar clamping device of the first robot 1, and one of the corners 101 of the stabilizer bar 10 to be quenched is facing the first quenching liquid injector 55, and a section of the rod 103 on the middle rod of the stabilizer bar near the other corner 102 of the stabilizer bar is facing the second quenching liquid injector 56. The length of the section of the rod 103 on the middle rod of the stabilizer bar near the other corner 102 of the stabilizer bar is related to the shape of the stabilizer bar. In this embodiment, the length L of the section of the rod 103 on the middle rod of the stabilizer bar near the other corner 102 of the stabilizer bar is 50 mm to 60 mm.

[0039] The robot controller 3 controls the first robot 1 and the second robot 2 to work together, so that the stabilizer bar passes through the quenching liquid spray sleeve 62 in a manner that one corner 101 is ahead of the other corner 102. When the stabilizer bar 10 passes through the induction heating coil 61, the quenching controller 4 controls the induction heating coil 61 to continue heating, and controls the quenching liquid spray sleeve 62 to continue spraying quenching liquid to the stabilizer bar 10 (the quenching liquid spray sleeve 62 can only spray quenching liquid through the quenching liquid spray sleeve 62), and when one corner 101 passes through the induction heating coil 61, the quenching controller 4 controls the induction heating coil 61 to continue heating, and controls the quenching liquid spray sleeve 62 to continue spraying quenching liquid to the stabilizer bar 10. After the heating coil 61, the first quenching liquid injector 55 is immediately controlled to spray quenching liquid on one of the corners 101 (the spraying time of the first quenching liquid injector 55 is approximately 5s to 6s). After a section of the rod body 103 on the middle rod body of the stabilizer bar near another corner 102 of the stabilizer bar passes through the induction heating coil 61, the second quenching liquid injector 56 is immediately controlled to spray quenching liquid on a section of the rod body on the middle rod body of the stabilizer bar near another corner 102 of the stabilizer bar (the spraying time of the first quenching liquid injector 55 is approximately 5s to 6s).

[0040] In this way, this embodiment achieves the purpose of supplementary cooling of the stabilizer bar corner 101 that first passes through the induction heating coil 61 and a section of the rod 103 on the middle rod of the stabilizer bar close to another corner 102 of the stabilizer bar, thereby solving the problems of insufficient hardenability and low strength of these two parts in the prior art and improving the product quality of the stabilizer bar.

[0041] The first robot 1 holds the stabilizer bar 10 to be quenched and passes through the induction heating coil 61 and the quenching liquid spray sleeve 62 from top to bottom along the center line of the stabilizer bar product shape trajectory. By adjusting the postures of the first robot 1 and the second robot 2, the first robot 1 and the second robot 2 work together to avoid interference and collision when the stabilizer bar passes through the induction heating coil 61. At the beginning, the pair of first jaws 51 and the pair of second jaws 52 are both in a closed state. When the pair of first jaws 51 or the pair of second jaws 52 are about to pass through the induction heating coil 61, the pair of jaws that are about to pass through the induction heating coil 61 can be opened, and the other pair of jaws can be closed.

[0042] The above description is a further explanation of the present invention in combination with specific implementation methods and drawings. However, the present invention can obviously be implemented in a variety of other methods different from the description, and those skilled in the art can generalize and deduce according to actual usage without violating the content of the present invention. Therefore, the content of the above specific embodiments should not limit the protection scope determined by the present invention.

Claims

1. A stabilizer bar induction quenching system based on dual robot collaboration comprises a first robot, a second robot, a robot controller and a quenching controller; a stabilizer bar clamping device is provided at the end of the first robot, a quenching coil assembly is provided at the end of the second robot, and the robot controller is used to control the operation of the first robot and the second robot; the quenching controller is connected to the robot controller in communication; characterized in that: The stabilizer bar clamping device comprises a base, a pair of first jaws, a first jaw driving mechanism, a pair of second jaws, a second jaw driving mechanism, a first quenching liquid injector and a second quenching liquid injector; the first jaw driving mechanism, the second jaw driving mechanism, the first quenching liquid injector and the second quenching liquid injector are respectively fixed on the base, the first jaw driving mechanism is respectively connected to the pair of first jaws for driving the pair of first jaws to open and close, the second jaw driving mechanism is respectively connected to the pair of second jaws for driving the pair of second jaws to open and close; the first quenching liquid injector is used to apply the quenching liquid to one of the corners of the stabilizer bar, and the second quenching liquid injector is used to apply the quenching liquid to a section of the middle part of the stabilizer bar near another corner of the stabilizer bar; The quenching coil assembly comprises an induction heating coil and a quenching liquid spray sleeve, wherein the quenching liquid spray sleeve is arranged outside the induction heating coil, and the inner wall of the quenching liquid spray sleeve is connected to the outer wall of the induction heating coil; a plurality of spray holes are arranged at the bottom of the quenching liquid spray sleeve, and the plurality of spray holes are located below the bottom surface of the induction heating coil; The quenching controller is used to control the operation of the first clamping jaw driving mechanism, the second clamping jaw driving mechanism, the induction heating coil, the quenching liquid spraying sleeve, the first quenching liquid injector and the second quenching liquid injector.

2. The stabilizer bar induction hardening system based on dual robot collaborative work according to claim 1 is characterized in that: The base is provided with a first guide rail and a second guide rail; The pair of first clamping jaws are slidably disposed on the first guide rail; the first clamping jaw driving mechanism comprises a first double-rod cylinder, and the first double-rod cylinder is respectively connected to the pair of first clamping jaws; The pair of second clamping jaws are slidably arranged on the second guide rail; the second clamping jaw driving mechanism comprises a second double-rod cylinder, and the second double-rod cylinder is respectively connected to the pair of second clamping jaws.

3. The stabilizer bar induction hardening system based on dual robot collaborative work according to claim 1 is characterized in that: The bottom surfaces of the first quenching liquid injector and the second quenching liquid injector are respectively provided with a plurality of liquid spraying holes, and the plurality of liquid spraying holes include a plurality of rows of liquid spraying holes arranged in a radial direction.

4. The induction hardening system for stabilizer bars based on the collaborative work of two robots according to claim 1 or 3, characterized in that: The stabilizer bar clamping device includes a first control valve and a second control valve; The first control valve is arranged on a first liquid supply pipe connected to a first quenching liquid injector, and the second control valve is arranged on a second liquid supply pipe connected to a second quenching liquid injector; the first output end and the second output end of the quenching controller are electrically connected to the control input end of the first control valve and the control input end of the second control valve respectively.

5. The induction hardening system for stabilizer bars based on the collaborative work of two robots according to claim 4 is characterized in that: The stabilizer bar clamping device comprises a water distributor, which is fixed to the base and is connected to the first liquid supply pipeline and the second liquid supply pipeline respectively.

6. The stabilizer bar induction hardening system based on dual robot collaborative work according to claim 1 is characterized in that: The quenching coil assembly includes a secondary transformer and a conductive member; The secondary transformer is fixed to the end of the second robot, one end of the conductive member is connected to the output end of the secondary transformer, and the other end of the conductive member is connected to the induction heating coil.

7. The induction hardening system for stabilizer bars based on the collaborative work of two robots according to claim 6 is characterized in that: The conductive member and the induction heating coil are both hollow structures, and the inner cavity of the conductive member is connected to the inner cavity of the induction heating coil; The conductive member is provided with a liquid inlet joint for introducing the cooling liquid into the inner cavity of the conductive member and a liquid outlet joint for leading the cooling liquid in the inner cavity of the conductive member out.

8. The induction hardening system for stabilizer bars based on the collaborative work of two robots according to claim 1 is characterized in that: A conical hole is provided at the bottom of the quenching liquid spray sleeve, and the multiple spray holes are arranged on the hole wall of the conical hole, and the multiple spray holes include at least two groups of spray holes arranged in a ring shape.

9. The induction hardening system for stabilizer bars based on the collaborative work of two robots according to claim 1 is characterized in that: The length of a section of the rod on the middle rod of the stabilizing rod close to another corner of the stabilizing rod is 50 mm to 60 mm.

10. A quenching method for a stabilizer bar induction quenching system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Clamp the stabilizer bar to be quenched on the stabilizer bar clamping device, and make one corner of the stabilizer bar to be quenched face the first quenching liquid injector, and make a section of the middle part of the stabilizer bar near the other corner of the stabilizer bar face the second quenching liquid injector; The robot controller controls the first robot and the second robot to work in coordination, so that the stabilizer bar passes through the induction heating coil in a manner that one of the corners precedes the other corner. In the process of the stabilizer bar passing through the induction heating coil, the quenching controller controls the induction heating coil to continue heating, controls the quenching liquid spray sleeve to continue spraying quenching liquid onto the stabilizer bar, and immediately controls the first quenching liquid injector to spray quenching liquid onto one of the corners after one of the corners passes through the induction heating coil, and immediately controls the second quenching liquid injector to spray quenching liquid onto a section of the middle rod body of the stabilizer bar near the other corner of the stabilizer bar after a section of the rod body near the other corner of the stabilizer bar passes through the induction heating coil.

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