Method for reusing old disc of wheel-mounted brake disc

Abstract

The application discloses a kind of old disc multiplexing methods of wheel-mounted brake disc, comprising the following steps: determining the residual wear thickness of old wheel-mounted brake disc;According to the residual wear thickness, determine whether the old wheel-mounted brake disc can be repaired;Check the plastic deformation of old wheel-mounted brake disc, and determine the type and deformation of plastic deformation;According to the type and deformation of plastic deformation, determine whether the old wheel-mounted brake disc can be repaired;Determine the material of old wheel-mounted brake disc;If the results of the foregoing determination are all yes, according to the material, repair the old wheel-mounted brake disc.The application realizes the effective screening of old brake disc, and can take different ways according to the material to repair the old wheel-mounted brake disc of different material, so that the applicability is better, and the success rate of repair is higher, reduces the situation that old wheel-mounted brake disc cannot be reused after repair, thereby improving the reusability of old wheel-mounted brake disc, which has great significance for reducing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brake disc, in particular to a method for reusing old brake disc of wheel-mounted brake disc. BACKGROUND

[0002] The rail transit vehicle brake disc can be classified into high-speed motor train unit, locomotive, passenger car, urban rail transit subway vehicle and city intercity vehicle according to the classification of vehicle. The rail transit vehicle brake disc can be classified into cast steel brake disc, forged steel brake disc, cast iron brake disc, ceramic composite material brake disc according to the classification of material.

[0003] In the process of braking of rail transit vehicle, the train brake clamp drives the brake pad to tightly embrace the brake disc mounted on the wheel or axle to generate friction, and the friction generates torque, which is transmitted to the wheel through the axle or directly to the wheel to generate opposite braking force, so that the vehicle stops from high-speed movement. The mechanical energy is converted into heat energy and dissipated in the air during the friction process.

[0004] The rail transit vehicle brake disc bears impact vibration load, vertical force load and thermal stress load generated by alternating cold and hot during service, and the superposition of several loads may cause a series of irreversible plastic deformation of the brake disc after service.

[0005] When the rail transit vehicle wheel reaches the life limit, the wheel-mounted brake disc mounted together with it needs to be disassembled and scrapped. Compared with the scrapped wheel, the wheel-mounted brake disc that has plastic deformation has not reached the life limit, but the wheel-mounted brake disc that has plastic deformation cannot be guaranteed to be installed on a new wheel for use like a new disc. The most obvious is that the disassembled wheel-mounted brake disc may have a certain disc-shaped warping deformation or wave twisting deformation. If the deformed wheel-mounted brake disc is directly used, the fastener may bear axial force or bending moment that exceeds the safe pre-tightening force range, which may cause the fastener to break during use, causing risks to the safe operation of the rail transit vehicle. Therefore, the brake disc needs to be straightened to realize the reuse of the old brake disc.

[0006] In the prior art, although there is a method for repairing and repairing the old wheel-mounted brake disc to realize the reuse of the old wheel-mounted brake disc, it is not suitable for all old wheel-mounted brake discs, and the repaired operation may still not be reused, resulting in low reuse rate of the old wheel-mounted brake disc. SUMMARY

[0007] The purpose of the present application is to provide a method for reusing old brake disc of wheel-mounted brake disc, to solve the technical problem that the current method for repairing and repairing the old wheel-mounted brake disc may still not be reused after the repair operation, resulting in low reuse rate of the old wheel-mounted brake disc.

[0008] The above object of the present application can be achieved by the following technical solution.

[0009] The present application provides a method for reusing old brake disc of wheel-mounted brake disc, comprising the following steps: determining the residual wear thickness of the old brake disc of wheel-mounted brake disc; determining whether the old brake disc of wheel-mounted brake disc can be repaired once according to the residual wear thickness; checking the plastic deformation of the old brake disc of wheel-mounted brake disc, and determining the type and deformation amount of plastic deformation; determining whether the old brake disc of wheel-mounted brake disc can be repaired once according to the type and deformation amount of plastic deformation; determining the material of the old brake disc of wheel-mounted brake disc; if the results of the foregoing determinations are all yes, repairing the old brake disc of wheel-mounted brake disc according to the material.

[0010] In the embodiment of the present application, if the residual wear thickness of the old brake disc of wheel-mounted brake disc is greater than or equal to half of the wear limit, it is determined that the old brake disc of wheel-mounted brake disc can be repaired once.

[0011] In the embodiment of the present application, if the type of plastic deformation is disc-shaped buckling deformation, and the deformation amount is less than 1.6 mm, it is determined that the old brake disc of wheel-mounted brake disc can be repaired once; or if the type of plastic deformation is twisted wave deformation, and the deformation amount is less than or equal to 0.5 mm, it is determined that the old brake disc of wheel-mounted brake disc can be repaired once; or if the type of plastic deformation includes disc-shaped buckling deformation and twisted wave deformation, and the deformation amount of disc-shaped buckling deformation is less than 1.6 mm, and the deformation amount of twisted wave deformation is less than or equal to 0.5 mm, it is determined that the old brake disc of wheel-mounted brake disc can be repaired once.

[0012] In the embodiment of the present application, before repairing the old brake disc of wheel-mounted brake disc according to the material, it further comprises: thirdly determining whether the old brake disc of wheel-mounted brake disc can be repaired according to the material, the residual wear thickness, and the type and deformation amount of plastic deformation; if the material is cast iron, the residual wear thickness is greater than or equal to 5.0 mm, and the type of plastic deformation is disc-shaped buckling deformation, and the deformation amount is less than or equal to 0.7 mm, it is determined that the old brake disc of wheel-mounted brake disc can be repaired; if the material is ceramic matrix composite material, the residual wear thickness is greater than or equal to 3.5 mm, and the type of plastic deformation is disc-shaped buckling deformation, and the deformation amount is less than or equal to 0.4 mm, it is determined that the old brake disc of wheel-mounted brake disc can be repaired.

[0013] In the embodiment of the present application, the material is cast iron, and repairing the old brake disc of wheel-mounted brake disc comprises: turning and repairing the friction surface of the old brake disc of wheel-mounted brake disc, so that the residual wear thickness of the old brake disc of wheel-mounted brake disc after turning and repairing is 4 mm to 4.5 mm, and the deformation amount of disc-shaped buckling deformation is less than or equal to 0.25 mm.

[0014] In the embodiment of the present application, the material is a ceramic matrix composite, and the old wheel-mounted brake disc is repaired by lapping, and the lapping cutting amount is less than or equal to 0.2 mm, and the deformation amount of the disc-shaped warping deformation is less than or equal to 0.2 mm.

[0015] In the embodiment of the present application, the material is cast steel or forged steel, and the old wheel-mounted brake disc is repaired by lapping, and the lapping cutting amount is less than or equal to 0.2 mm, and the deformation amount of the disc-shaped warping deformation is less than or equal to 0.2 mm.

[0016] In the embodiment of the present application, the old wheel-mounted brake disc is repaired by lapping, and the lapping cutting amount is less than or equal to 0.2 mm, and the deformation amount of the disc-shaped warping deformation is less than or equal to 0.2 mm.

[0017] In the embodiment of the present application, the old wheel-mounted brake disc is repaired by lapping, and the lapping cutting amount is less than or equal to 0.2 mm, and the deformation amount of the disc-shaped warping deformation is less than or equal to 0.2 mm.

[0018] In the embodiment of the present application, the old wheel-mounted brake disc is repaired by lapping, and the lapping cutting amount is less than or equal to 0.2 mm, and the deformation amount of the disc-shaped warping deformation is less than or equal to 0.2 mm.

[0019] In the embodiment of the present application, the old wheel-mounted brake disc is repaired by lapping, and the lapping cutting amount is less than or equal to 0.2 mm, and the deformation amount of the disc-shaped warping deformation is less than or equal to 0.2 mm.

[0020] In the embodiment of the present application, after repairing the old wheel-mounted brake disc by combining lapping with reverse pressing deformation, the following steps are further included: checking the deformation amount of the old wheel-mounted brake disc; determining whether the old wheel-mounted brake disc is repaired according to the deformation amount; and if the deformation amount of the disc-shaped warping deformation and the deformation amount of the twisted wave deformation of the old wheel-mounted brake disc in the free state are both less than or equal to 0.2 mm, the determination result is yes.

[0021] In the embodiment of the present application, after repairing the old wheel-mounted brake disc, the following steps are further included: performing ultrasonic flaw detection and magnetic particle flaw detection on the repaired old wheel-mounted brake disc to ensure that it is free of defects and cracks; and assembling the repaired old wheel-mounted brake disc with a new wheel through new fasteners.

[0022] The characteristics and advantages of the present application are:

[0023] The old disc reuse method of the wheel-mounted brake disc of the present application realizes effective screening of the old brake disc by one-time determination according to the remaining wear thickness and one-time determination according to the type and deformation amount of plastic deformation, and finally repairs the old wheel-mounted brake disc according to the material, thereby taking different ways to repair the old wheel-mounted brake disc of different materials, making the applicability better, the success rate of repair higher, reducing the situation that the old wheel-mounted brake disc cannot be reused after repair, thereby improving the reuse rate of the old wheel-mounted brake disc, and having great significance for reducing costs. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 It is a flowchart of the old disc reuse method in the present application.

[0026] Figure 2 It is a schematic diagram of the disc-shaped warping deformation of the wheel-mounted brake disc in the present application.

[0027] Figure 3 It is a schematic diagram of the twisted wave deformation of the wheel-mounted brake disc in the present application. DETAILED DESCRIPTION

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figure 1 As shown, the present invention provides a method for reusing old wheel brake discs, comprising the following steps:

[0030] Step 101: Determine the remaining wear thickness of the brake disc on the old wheel.

[0031] Specifically, the remaining wear thickness refers to the thickness of the thinnest part of the old wheel-mounted brake disc. The remaining wear thickness of the old wheel-mounted brake disc is determined by measuring the thickness of a clean, crack-free old wheel-mounted brake disc using gauges such as calipers, steel rulers, or other inspection systems.

[0032] Step 102: Determine whether the old wheel brake disc can be repaired based on the remaining wear thickness. This initial screening based on the remaining wear thickness increases the likelihood of successful repair and reuse of the old wheel brake disc.

[0033] Specifically, if the remaining wear thickness is greater than or equal to half of the wear limit, it is considered "yes," meaning the old wheel-mounted brake disc has the potential for successful repair and reuse. For example, for an old wheel-mounted brake disc with a wear limit of 3mm, the remaining wear thickness should be greater than or equal to 1.5mm; for another example, for an old wheel-mounted brake disc with a wear limit of 5mm, the remaining wear thickness should be greater than or equal to 2.5mm; and for yet another example, for a brake disc with a wear limit of 7mm, the remaining wear thickness should be greater than or equal to 3.5mm. Old brake discs meeting these standards can be reused after straightening. However, if the remaining wear thickness is less than half of the wear limit, it is considered "no," meaning the possibility of successful repair of the old wheel-mounted brake disc is very low, and it should be scrapped.

[0034] Step 103: Inspect the plastic deformation of the old wheel-mounted brake disc and determine the type and amount of plastic deformation.

[0035] Specifically, the types of plastic deformation in old wheel-mounted brake discs mainly include disc-shaped warping deformation (such as...). Figure 2 (as shown) and twisted wave deformation ( Figure 3 As shown, the amount of deformation can be measured using a straightedge and feeler gauge, or a steel ruler, or other testing equipment.

[0036] Step 104: judging whether the old wheel-mounted brake disc can be repaired according to the type and deformation amount of plastic deformation. Through the first judgment based on the type and deformation amount of plastic deformation, further screening is realized, thereby further improving the possibility of reusing the old wheel-mounted brake disc after successful repair.

[0037] Specifically, if the type of plastic deformation is disc-shaped warping deformation and the deformation amount is less than 1.6 mm, it is determined to be yes; or if the type of plastic deformation is twisted wave deformation and the deformation amount is less than or equal to 0.5 mm, it is determined to be yes; or if the type of plastic deformation includes disc-shaped warping deformation and twisted wave deformation, the deformation amount of disc-shaped warping deformation is less than 1.6 mm, and the deformation amount of twisted wave deformation is less than or equal to 0.5 mm, it is determined to be yes. For disc-shaped warping deformation with a deformation amount greater than or equal to 1.6 mm, it is determined to be no; and for twisted wave deformation with a deformation amount greater than 0.5 mm, it is determined to be no; and further can be scrapped.

[0038] Step 105: determining the material of the old wheel-mounted brake disc. Specifically, the material of the old wheel-mounted brake disc is mainly divided into cast iron, ceramic matrix composite material, cast steel and forged steel.

[0039] It should be noted that the above steps can be first determined whether the old wheel-mounted brake disc can be repaired according to the remaining wear thickness in the embodiment, and then secondly determined whether the old wheel-mounted brake disc can be repaired according to the type and deformation amount of plastic deformation, and the above steps 101, 102, 103 and 104 are sequentially performed; or first determined whether the old wheel-mounted brake disc can be repaired according to the type and deformation amount of plastic deformation, and then secondly determined whether the old wheel-mounted brake disc can be repaired according to the remaining wear thickness; therefore, the order of steps 101, 103 and 105 can not be specifically limited, as long as step 102 is after step 101, step 104 is after step 103, and two determinations are realized.

[0040] If the results of the foregoing determinations are all yes, the old wheel-mounted brake disc is repaired according to the material.

[0041] The old disc reuse method of the wheel-mounted brake disc of the application realizes effective screening of the old brake disc by first determining according to the remaining wear thickness and first determining according to the type and deformation amount of plastic deformation, and finally repairing the old wheel-mounted brake disc according to the material, thereby taking different ways to repair the old wheel-mounted brake disc of different materials, making the applicability better and the success rate of repair higher, reducing the situation that the old wheel-mounted brake disc cannot be reused after repair, thereby improving the reuse rate of the old wheel-mounted brake disc, which has great significance for reducing cost.

[0042] In some embodiments of the present application, after determining the material of the old wheel-mounted brake disc 2, and before repairing the old wheel-mounted brake disc 2 according to the material, the method further comprises the following steps:

[0043] In step 106, it is determined whether the old wheel-mounted brake disc 2 can be repaired according to the material, the remaining wear thickness, and the type and amount of plastic deformation. By making the third determination based on the type and amount of plastic deformation, further screening is achieved, and the old wheel-mounted brake disc 2 can be repaired in a targeted manner, thereby further improving the possibility of reusing the old wheel-mounted brake disc 2 after successful repair.

[0044] Specifically, since materials such as cast iron and ceramic matrix composites are brittle, the main type of plastic deformation is disc-shaped warping deformation. When the material is cast iron, the remaining wear thickness is greater than or equal to 5.0 mm, the type of plastic deformation is disc-shaped warping deformation, and the deformation amount is less than or equal to 0.7 mm, it is determined to be yes. When the material is a ceramic matrix composite, the remaining wear thickness is greater than or equal to 3.5 mm, the type of plastic deformation is disc-shaped warping deformation, and the deformation amount is less than or equal to 0.4 mm, it is determined to be yes.

[0045] Further, in step 107, the old wheel-mounted brake disc 2 is repaired according to the material when the results of the three determinations are yes.

[0046] Specifically, the old wheel-mounted brake disc 2 with cast iron material is repaired by performing lapping on the friction surface 21 of the old wheel-mounted brake disc 2, so that the remaining wear thickness of the old wheel-mounted brake disc 2 after lapping is 4 mm to 4.5 mm, and the deformation amount of disc-shaped warping deformation is less than or equal to 0.25 mm, thereby repairing the old wheel-mounted brake disc 2.

[0047] Specifically, the old wheel-mounted brake disc 2 with a ceramic matrix composite material is repaired by performing lapping on the friction surface 21 of the old wheel-mounted brake disc 2, so that the deformation amount of disc-shaped warping deformation is less than or equal to 0.2 mm when the cutting amount of lapping is less than or equal to 0.2 mm, thereby repairing the old wheel-mounted brake disc 2.

[0048] In other embodiments of the present application, the material is cast steel or forged steel, and step 106 is not performed, and step 107' is directly performed to repair the old wheel-mounted brake disc 3 when the results of the two determinations are yes, comprising the following steps:

[0049] In step 108, the repair method is determined according to the type and amount of plastic deformation.

[0050] When the type of plastic deformation is the twist wave deformation or the deformation amount of the disc-shaped warping deformation is less than or equal to 0.6 mm, the old wheel-mounted brake disc 3 is repaired by means of turning repair. Specifically, the friction surface 31 of the old wheel-mounted brake disc 3 is turned and repaired, and the cutting amount of the turning repair cutting is not greater than 0.1 mm, so as to repair the old wheel-mounted brake disc 3.

[0051] When the deformation amount of the disc-shaped warping deformation is greater than 0.6 mm and less than 1.6 mm, the old wheel-mounted brake disc 3 is repaired by means of turning repair combined with reverse pressing deformation.

[0052] In some embodiments of the present application, the old wheel-mounted brake disc 3 is first reversely pressed, and after the pressure is unloaded, the old wheel-mounted brake disc 3 rebounds. In the free state of the old wheel-mounted brake disc 3, the deformation amount of the disc-shaped warping deformation and the deformation amount of the twist wave deformation should both be less than or equal to 0.3 mm. Then, the friction surface 31 of the old wheel-mounted brake disc 3 is turned and repaired, and the cutting amount of the turning repair cutting is not greater than 0.4 mm.

[0053] In some other embodiments of the present application, the friction surface 31 of the old wheel-mounted brake disc 3 is first turned and repaired, and the old wheel-mounted brake disc 3 is flattened during the turning repair process. The cutting amount of the turning repair cutting is not greater than 0.4 mm. Then, the old wheel-mounted brake disc 3 is reversely pressed.

[0054] After the old wheel-mounted brake disc 3 is repaired by means of turning repair combined with reverse pressing deformation, the following steps are further included: checking the deformation amount of the old wheel-mounted brake disc 3; step 111, determining whether the repair is completed according to the deformation amount; if the deformation amount of the disc-shaped warping deformation and the deformation amount of the twist wave deformation of the old wheel-mounted brake disc in the free state are both less than or equal to 0.2 mm, the determination result is yes, indicating that the repair is completed; if the deformation amount of the disc-shaped warping deformation or the deformation amount of the twist wave deformation of the old wheel-mounted brake disc in the free state is greater than 0.2 mm, the determination result is no, indicating that the old wheel-mounted brake disc can be scrapped.

[0055] Since the toughness of cast steel and forged steel materials is good, disc-shaped warping deformation and twist wave deformation can both occur, that is, disc-shaped warping deformation can occur alone, twist wave deformation can occur alone, or disc-shaped warping deformation and twist wave deformation can occur simultaneously. Therefore, when the material is cast steel or forged steel, based on the results of the previous two determinations, the remaining wear thickness and the deformation amount of the plastic deformation meet the repairable requirements, different repair methods can be used according to the type and deformation amount of the plastic deformation, which not only improves the efficiency of repairing the old wheel-mounted brake disc 3 made of cast steel or forged steel, but also improves the success rate of the repair.

[0056] In the embodiment of the application, after repairing the old wheel-mounted brake disc, the following steps are further included: step 109, ultrasonic and magnetic powder flaw detection are performed on the repaired old wheel-mounted brake disc to ensure that it is free of defects and cracks; and step 110, the repaired old wheel-mounted brake disc is assembled with a new wheel through new fasteners. If the repaired old wheel-mounted brake disc has defects and cracks, it can be disposed of.

[0057] In order to better understand the old disc reuse method of the wheel-mounted brake disc of the application, three specific embodiments are provided as follows:

[0058] Reference Figure 2 In an embodiment of the application, the old wheel-mounted brake disc 2 of the high-speed EMU after disassembly, cleaning and flaw detection is made of cast iron, and the wear limit is 7 mm. The remaining wear thickness of the old wheel-mounted brake disc 2 is checked by using a caliper, and the remaining wear amount of the old wheel-mounted brake disc 2 is 6.26 mm, which is greater than 3.5 mm. Therefore, the result of the first determination is yes, and the next step is performed.

[0059] The plastic deformation of the old wheel-mounted brake disc 2 is checked by using a straightedge and a feeler gauge or a steel rule, or other detection equipment. The deformation amount of the disc-shaped warping deformation of the old wheel-mounted brake disc 2 is 0.54 mm, which is less than 1.6 mm, and there is no twisted wave deformation. Therefore, the result of the second determination is yes, and the next step is performed.

[0060] Since the material of the old wheel-mounted brake disc 2 is cast iron, the remaining wear thickness thereof is 6.26 mm, which is greater than 5.0 mm, and the deformation amount of the disc-shaped warping deformation thereof is 0.54 mm, which is less than 0.7 mm. Therefore, the result of the third determination is yes, and the next step is performed.

[0061] The old wheel-mounted brake disc 2 is repaired by turning and grinding: the friction surface 21 of the old wheel-mounted brake disc 2 is placed upward, and the rib surface 22 is placed downward on a vertical lathe or a machining center. After positioning, the friction surface 21 is turned and ground, and the cutting amount is 1.76 mm. The turning is performed in four times. Finally, the remaining wear thickness of the old wheel-mounted brake disc 2 is 4.5 mm, and the disc-shaped warping deformation amount is 0.23 mm, which is less than 0.25 mm. Therefore, the repair is completed.

[0062] The repaired old wheel-mounted brake disc 2 is subjected to ultrasonic and magnetic powder flaw detection, and is free of defects and cracks. Then, production information is engraved and stamped, new fasteners are matched, and the repaired old wheel-mounted brake disc 2 is assembled with a new wheel.

[0063] Reference Figure 2In another embodiment of the present application, the old wheel-mounted brake disc 2 of the urban rail transit subway vehicle after disassembly, cleaning and flaw detection is repaired by the following steps: the old wheel-mounted brake disc 2 is placed on a vertical lathe or a machining center with the friction surface 21 upward and the rib surface 22 downward, the old wheel-mounted brake disc 2 is positioned, the friction surface 21 is turned and lapped, the remaining wear thickness of the old wheel-mounted brake disc 2 is 4.51 mm, the cutting amount is 0.15 mm, which is less than 0.2 mm, the deformation amount of the disc-shaped warping deformation is 0.12 mm, which is less than 0.2 mm, and thus the repair is completed;

[0064] The old wheel-mounted brake disc 2 is checked by a plastic deformation measurement test bench, disc-shaped warping deformation occurs, the deformation amount is 0.22 mm, which is less than 1.6 mm, and there is no twisted wave deformation, and thus the second-time judgment result is yes, and the next step can be performed;

[0065] The material of the old wheel-mounted brake disc 2 is ceramic matrix composite material, which is not easy to deform and has good wear resistance, and thus the remaining wear thickness and the disc-shaped warping deformation of the brake disc are judged for the third time, the remaining wear thickness of the old wheel-mounted brake disc 2 is 4.66 mm, which is greater than 3.6 mm, and the deformation amount of the disc-shaped warping deformation is 0.22 mm, which is less than 0.7 mm, and thus the third-time judgment is yes, and the repair can be performed;

[0066] The old wheel-mounted brake disc 2 is repaired by lapping: the old wheel-mounted brake disc 2 is placed on a vertical lathe or a machining center with the friction surface 21 upward and the rib surface 22 downward, the old wheel-mounted brake disc 2 is positioned, the friction surface 21 is turned and lapped, the remaining wear thickness of the old wheel-mounted brake disc 2 is 4.51 mm, the cutting amount is 0.15 mm, which is less than 0.2 mm, the deformation amount of the disc-shaped warping deformation is 0.12 mm, which is less than 0.2 mm, and thus the repair is completed;

[0067] The repaired old wheel-mounted brake disc 2 is subjected to ultrasonic flaw detection and magnetic particle flaw detection, and then production information is engraved and new fasteners are matched to assemble the new wheel.

[0068] Reference Figure 3 In another embodiment of the present application, the old wheel-mounted brake disc 3 of the high-speed EMU after disassembly, cleaning and flaw detection is repaired by the following steps: the old wheel-mounted brake disc 3 is placed on a plastic deformation measurement test bench, the remaining wear thickness, the deformation amount of the disc-shaped warping deformation and the deformation amount of the twisted wave deformation are tested and checked, the test and check result is that the remaining wear thickness of the old wheel-mounted brake disc 3 is 2.42 mm, which is greater than 1.5 mm, the deformation amount of the disc-shaped warping deformation is 1.22 mm, which is less than 1.6 mm, and the deformation amount of the twisted wave deformation is 0.37 mm, which is less than 0.5 mm, and thus the two-time judgment results are yes, and the next step can be performed;

[0069] Since the deformation amount of the disc-shaped warping deformation of the old wheel-mounted brake disc 3 is 1.22 mm, which is greater than 0.6 mm and less than 1.6 mm, the old wheel-mounted brake disc 3 is repaired by combining lapping and reverse pressure deformation: the old wheel-mounted brake disc 3 is placed on a vertical lathe or machining center with the friction surface 31 facing up and the rib surface 32 facing down, after positioning, the friction surface 31 is lapped and cut by turning, the cutting amount is 0.32 mm, which is less than 0.4 mm, then it is placed on a reverse pressure deformation tool or testing machine, and the old wheel-mounted brake disc 3 is subjected to reverse pressure deformation, the remaining wear thickness, the deformation amount of the disc-shaped warping deformation and the deformation amount of the twisted wave deformation of the old wheel-mounted brake disc 3 after reverse pressure deformation are tested and checked again by using a plastic deformation measurement test bench, the test and check results are that the deformation amount of the disc-shaped warping deformation of the old wheel-mounted brake disc 3 in a free state is 0.16 mm, and the deformation amount of the twisted wave deformation is 0.11 mm, both of which are less than 0.2 mm, so the repair is completed.

[0070] The repaired brake disc is subjected to ultrasonic flaw detection and magnetic particle flaw detection, and then production information is engraved and punched, new fasteners are matched, and the new wheel is assembled.

[0071] The above only describes several embodiments of the present application, and those skilled in the art can make various modifications or changes to the embodiments of the present application according to the disclosed content of the application document without departing from the spirit and scope of the present application.

Claims

1. A method for reusing old wheel brake discs, characterized in that, Includes the following steps: Determine the remaining wear thickness of the brake disc on the old wheel; Based on the remaining wear thickness, determine whether the old wheel brake disc can be repaired in one operation; Inspect the plastic deformation of the old wheel-mounted brake disc and determine the type and amount of plastic deformation; Based on the type and amount of plastic deformation, determine whether the old wheel-mounted brake disc can be repaired; wherein, if the type of plastic deformation is disc-shaped warping deformation and the amount of deformation is less than 1.6 mm, it is determined to be yes; or if the type of plastic deformation is torsional wavy deformation and the amount of deformation is less than or equal to 0.5 mm, it is determined to be yes; or if the type of plastic deformation includes disc-shaped warping deformation and torsional wavy deformation, and the amount of deformation of disc-shaped warping deformation is less than 1.6 mm and the amount of deformation of torsional wavy deformation is less than or equal to 0.5 mm, it is determined to be yes. Determine the material of the old wheel-mounted brake disc; If the results of the aforementioned determinations are all yes, the old wheel-mounted brake disc shall be repaired according to the material.

2. The method for reusing old wheel brake discs according to claim 1, characterized in that, The step of determining whether the old wheel-mounted brake disc can be repaired based on the remaining wear thickness includes: if the remaining wear thickness of the old wheel-mounted brake disc is greater than or equal to half of its wear limit, then it is determined to be repairable.

3. The method for reusing old wheel brake discs according to claim 1, characterized in that, Before repairing the old wheel-mounted brake disc according to the material, the method further includes: Based on the material, the remaining wear thickness, and the type and amount of plastic deformation, a third determination is made as to whether the old wheel brake disc can be repaired. When the material is cast iron, the remaining wear thickness is greater than or equal to 5.0 mm, the type of plastic deformation is disc-shaped warping deformation, and the deformation amount is less than or equal to 0.7 mm, it is determined to be yes; When the material is a ceramic matrix composite material, the remaining wear thickness is greater than or equal to 3.5 mm, the type of plastic deformation is disc-shaped warping deformation, and the deformation amount is less than or equal to 0.4 mm, it is determined to be yes.

4. The method for reusing old discs of wheel-mounted brake discs according to claim 3, characterized in that, The material is cast iron, and the repair of the old wheel-mounted brake disc includes: The friction surface of the old wheel-mounted brake disc is turned over so that the remaining wear thickness of the old wheel-mounted brake disc after turning is 4mm~4.5mm, and the deformation of the disc-shaped warping deformation is less than or equal to 0.25mm.

5. The method for reusing old discs of wheel-mounted brake discs according to claim 3, characterized in that, The material is a ceramic matrix composite material, and the repair of the old wheel-mounted brake disc includes: The friction surface of the old wheel-mounted brake disc is turned over so that the amount of disc-shaped warping deformation is less than or equal to 0.2 mm when the amount of cutting during turning is less than or equal to 0.2 mm.

6. The method for reusing old wheel brake discs according to claim 1, characterized in that, The material is cast steel or forged steel. The repair of the old wheel-mounted brake disc includes the following steps: The repair method is determined based on the type and amount of plastic deformation. When the type of plastic deformation is torsional wave deformation or the amount of deformation of disc warping is less than or equal to 0.6 mm, the old wheel brake disc is repaired by turning. When the deformation of the disc-shaped warping is greater than 0.6 mm and less than 1.6 mm, the old wheel-mounted brake disc is repaired by a combination of turning and reverse pressing deformation.

7. The method for reusing old discs of wheel-mounted brake discs according to claim 6, characterized in that, The repair of the old wheel-mounted brake disc by turning includes: turning the friction surface of the old wheel-mounted brake disc, and the cutting amount of the turning is not greater than 0.1mm.

8. The method for reusing old discs of wheel-mounted brake discs according to claim 6, characterized in that, The repair of the old wheel-mounted brake disc by combining turning and reverse pressing deformation includes the following steps: The old wheel-mounted brake disc is reverse-pressed to a preset state; The friction surface of the old wheel-mounted brake disc is turned over, and the cutting amount of the turning is not greater than 0.4 mm.

9. The method for reusing old discs of wheel-mounted brake discs according to claim 8, characterized in that, The reverse pressing of the old wheel-mounted brake disc to a preset state includes the following steps: The old wheel-mounted brake disc is reverse-pressed; When the pressure is unloaded, the old wheel-mounted brake disc rebounds, and in the free state of the old wheel-mounted brake disc, the deformation amount of the disc-shaped warping deformation and the deformation amount of the torsional wave deformation are both less than or equal to 0.3 mm.

10. The method for reusing an old wheel brake disc according to claim 6, characterized in that, The repair of the old wheel-mounted brake disc by combining turning and reverse pressing deformation includes the following steps: The friction surface of the old wheel-mounted brake disc is turned over, and the old wheel-mounted brake disc is flattened during the turning process, and the cutting amount of the turning is not greater than 0.4mm; The old wheel-mounted brake disc is pressed in the reverse direction.

11. The method for reusing old discs of wheel-mounted brake discs according to claim 9 or 10, characterized in that, After repairing the old wheel-mounted brake disc by combining turning and reverse pressing deformation, the following steps are also included: The deformation of the old wheel-mounted brake disc was inspected; Based on the amount of deformation, determine whether the old wheel brake disc has been repaired. If, in the free state of the old wheel-mounted brake disc, the deformation amount of the disc-shaped warping deformation and the deformation amount of the torsional wave deformation are both less than or equal to 0.2 mm, then the determination result is yes.

12. The method for reusing old discs of wheeled brake discs according to claim 1, characterized in that, After repairing the old wheel-mounted brake disc, the procedure also includes the following steps: The repaired old wheel brake disc was subjected to ultrasonic and magnetic particle testing to ensure that it was free of defects and cracks. The repaired old wheel-mounted brake disc is assembled with the new wheel using new fasteners.

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