Cleaning system and cleaning method for machining surface of brake pads in combined grinding machine

Abstract

The present invention relates to the technical field of auxiliary cleaning tools for metal accessories production, and discloses a cleaning system and a cleaning method for the machining surface of a brake pad in a combined grinding machine, including a plurality of groups of wear chip cleaning devices installed on a closed cover body thereof. Each group of wear chip cleaning devices is sequentially provided with a multi-stage adsorption tube structure, an anti-falling mechanism and a curved conveying pipe along the flow direction of the cleaning waste chips. The multi-stage adsorption tube structure includes two groups of adsorption branch pipe assemblies, each group is provided with a plurality of adsorption pipes arranged in a cone shape that converges at the top and diffuses at the bottom, and respectively corresponds to two adjacent processes for time-divided cleaning. The anti-falling mechanism includes an isolation cover and an anti-falling structure, and a labyrinth seal is formed through the double-layer protection design of a first receiving circulation plate and a second receiving circulation plate. The second receiving circulation plate is inclined, and one end of the circulation grid is higher than one end of the second closed part. The present invention adopts a time-divided cleaning method, combined with a multi-stage protection mechanism, to effectively solve the problems of waste chip fallback pollution and pipeline blockage.

Description

Technical Field

[0001] The invention relates to the technical field of auxiliary cleaning tools for metal fitting production, and in particular to a processing surface cleaning system and a cleaning method for combined grinding of brake pads. Background Art

[0002] In the prior art, during the manufacturing process of automobile brake pads, the working part (abrasive) of the brake pad is processed by pressing it to the back of the steel with a surplus. In order to improve the processing efficiency, a combined grinder is usually used for processing, which is provided with a grooving device, a rough grinding device, a beveling device and a fine grinding device in sequence along the conveying direction of the conveying device, and these devices are surrounded by a closed cover 022.

[0003] During the processing of brake pads, the cleanliness of the surface to be processed of the brake pads must be ensured before each process begins, because if the surface to be processed is stained with abrasives, it will affect the subsequent processing accuracy and surface quality. Therefore, the surface to be processed of the brake pads needs to be cleaned between adjacent processes.

[0004] The commonly used cleaning method at present is to use negative pressure airflow to remove during the processing. Although this method has a simple structure, it has the following technical defects:

[0005] 1. To achieve effective cleaning effect, a large negative pressure suction is required, which increases the energy consumption of the equipment;

[0006] 2. Since the brake pad abrasive contains a large amount of colloid components, the grinding process will produce grinding chips with colloid. These grinding chips are easily formed into highly adhesive rubber powder after being heated during the grinding process. These rubber powders are very easy to accumulate in the negative pressure pipeline system, especially at the bends of the pipeline. When the accumulation reaches a certain weight and exceeds the negative pressure suction, or when the negative pressure is unstable and decreases, the accumulation will fall off and fall onto the brake pad surface to be processed, causing contamination of the processed surface and affecting the subsequent processing quality. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings of the prior art. The present invention provides a system for cleaning the machining surface of a brake pad in a combined grinder. The system realizes time-divided cleaning through an innovative multi-stage adsorption structure. The problem of waste chip fallback pollution and pipeline blockage is effectively solved in conjunction with a crushable anti-falling mechanism, thereby significantly improving the cleaning efficiency and quality assurance during the brake pad machining process.

[0008] In order to solve the above problems, the present invention adopts the following scheme: a system for cleaning the machining surface of a brake pad in a combination grinder, comprising a combination grinder provided with a closed cover body, which is used to perform grooving, rough grinding, beveling and fine grinding on the brake pad; a plurality of groups of grinding chip cleaning devices are installed on the closed cover body, each group comprising a multi-stage adsorption tube structure, an anti-falling mechanism and a curved conveying tube, a multi-stage adsorption structure is adopted to correspond to different processes and to clean in different time periods, and the anti-falling mechanism is used to prevent waste chips from falling back and polluting, which not only improves the cleaning efficiency but also ensures the machining quality, and its overall structure is compact and cooperates well with the existing grinder.

[0009] Double-layer design of the anti-drop mechanism: By setting the first receiving flow plate and the second receiving flow plate, and adopting the staggered arrangement of the flow holes and the flow grid, a labyrinth seal structure is formed. The flow holes are completely located below the second closed part, and the flow grid is completely located above the first closed part, which ensures the one-way flow of waste chips and reliably intercepts the falling waste chips, fundamentally solving the problem of waste chip falling pollution.

[0010] As a preferred embodiment, the inclined circulation plate: the second receiving circulation plate is inclined, and the end of the circulation grid is higher than the end of the second closed part. This inclined design cleverly uses the gravity effect to promote the flow of waste chips, avoids the accumulation of waste chips on the plate surface, significantly improves the self-cleaning ability of the cleaning system, and reduces the system maintenance cost.

[0011] As a preferred option, a crushable structure design is used: a crushable structure is added to the anti-drop mechanism, including a two-stage processing mechanism of a crushing fan and a cutting blade. This design effectively handles sticky waste chips, prevents waste chips from agglomerating in the pipeline, greatly reduces the risk of system blockage, and improves the long-term operation stability of the system.

[0012] As a preferred embodiment, the transmission structure of the cutting device is as follows: the cutting blade is fixed to the upper part of the connecting shaft by coaxial sleeve connection, and is driven to rotate by the motor of the crushing fan. This coaxial design not only simplifies the transmission structure, but also improves the crushing efficiency, while effectively reducing the energy consumption of the system.

[0013] As a preferred embodiment, the connection disc is arranged at the bottom of the isolation cover, and is provided with a plurality of connection holes connected to the adsorption pipe. This design ensures reliable connection of each channel, improves the sealing of the system, optimizes the flow path of waste chips, and makes the whole cleaning process smoother.

[0014] As a preferred circumferential sealing structure: the first receiving flow plate is coaxially arranged with the connecting disc, and a circumferential side plate is additionally provided to surround the outer peripheral wall of the connecting disc. Through this all-round sealing design, waste chips are effectively prevented from leaking from the gap, and the cleaning efficiency is significantly improved.

[0015] As a preferred embodiment, a three-level protection design is adopted: a third sealing part is provided on the connecting disc so that the flow hole can be completely located above it. This design adds a protective barrier, provides additional waste collection space, and further enhances the reliability of the system.

[0016] As a preference, the angle layout is optimized: adopting a specific angle layout, the setting of two adsorption pipes in each group of adsorption branch pipe components, the distribution of connecting through holes at a central angle of 60°, and the 180° arrangement of the third closed part, not only optimizes the space utilization and ensures complete coverage of the cleaning range, but also facilitates the maintenance and cleaning of the system.

[0017] A method for cleaning the machined surface of a brake pad during machining on a combined grinder is also provided, using the cleaning system as described above, and the cleaning method comprises the following steps:

[0018] Step a: During the combined grinding of the brake pad: when one of the processes is being performed, the conveying device of the combined grinding machine is stopped;

[0019] Step b: starting a group of adsorption sub-pipe components corresponding to the process to clean;

[0020] Step c: Rotate the anti-falling structure to connect the flow hole on the first receiving flow plate to the adsorption pipe corresponding to the process; clean the surface of the brake pad to transport the cleaning waste to the delivery pipe system through the adsorption pipe, the anti-falling mechanism and the curved delivery pipe in sequence.

[0021] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0022] 1. The innovative concept of time-divided cleaning is proposed, which separates the processing process from the cleaning process, avoiding the interference of the cleaning process on the processing quality, while ensuring the cleanliness of the brake pad surface before each process;

[0023] 2. The innovatively designed multi-stage adsorption tube structure adopts a cone-shaped arrangement with upper gathering and lower diffusion, which not only expands the cleaning coverage, but also optimizes the airflow channel and reduces the system energy consumption;

[0024] 3. A double-layer protection anti-falling mechanism is designed. The staggered arrangement of the flow holes and the flow grid forms a labyrinth seal, which, combined with the inclined receiving flow plate, fundamentally solves the problem of waste chip fallback pollution;

[0025] 4. The innovative dual-stage processing mechanism of cutting blades and crushing fans effectively handles sticky waste, prevents pipe blockage, and improves the long-term operation stability of the system;

[0026] 5. Through the careful design of the circumferential side plates, connecting discs and other structures, the system is reliably sealed, the leakage of waste chips is avoided, and the cleaning effect is guaranteed;

[0027] 6. The whole system has a compact structure and is easy to install. It can be directly applied to the existing combined grinder and has strong practicality and promotion value.

[0028] In general, the present invention not only solves the technical problems of waste chip fall pollution, pipeline blockage and the like existing in the prior art, but also achieves the goal of energy conservation and environmental protection, significantly improves the processing quality and production efficiency of brake pads, and has important practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the figures required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the figures described below are only some embodiments of the present application. For ordinary technicians in this field, other figures can be obtained based on these figures without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of the prior art solution;

[0031] Figure 2 This is a partial structural schematic diagram of Example 1 in which only one set of wear debris cleaning devices is installed, wherein the brake pads are shown externally in an arranged manner;

[0032] Figure 3 It is a schematic diagram of a part of the anatomical structure at the crushable anti-falling mechanism of Example 1;

[0033] Figure 4 This is a schematic diagram of the structure of the abrasive cleaning device of Example 1 disassembled and the isolation cover dissected;

[0034] Figure 5 This is a schematic diagram of the structure when the anti-falling structure and the crushable structure cooperate with each other in Example 1;

[0035] Figure 6 This is a structural schematic diagram of the communication between the flow hole of the first receiving flow plate and the adsorption pipeline in Example 2;

[0036] Figure 7 It is a schematic structural diagram of the flow hole of the first receiving flow plate and the third sealing portion corresponding to Example 2.

[0037] Figure numerals: brake pad 01, combined grinder 02, grinding chip cleaning device 10, multi-stage adsorption tube structure 11, crushable anti-falling mechanism 12, curved conveying pipe 13, adsorption branch pipe assembly 110, adsorption pipeline 1101, isolation cover 121, anti-falling structure 122, first receiving circulation plate 1221, second receiving circulation plate 1222, circulation hole 1201, first closed part 1202, circulation grid 1203, second closed part 1024, circumferential side plate 1205, crushable structure 123, crushing fan 1231, cutting blade 1232, connecting shaft 124, connecting plate 104, connecting disc 105, connecting through hole 1051, third closed part 1052. DETAILED DESCRIPTION

[0038] The following will be combined Figure 1-Figure 7 The preferred embodiments of the present invention are described in detail. It should be noted that the following description is only a preferred embodiment of the present invention, rather than a limitation of the present invention. Those skilled in the art should understand that various modifications and variations can be made to the present invention without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

[0039] Embodiment 1:

[0040] This embodiment mainly combines the existing brake pad 01 with a grinding and cleaning device (such as Figure 1 ) for improvement. In order to improve the processing efficiency of the brake pad 01, a combined grinder 02 is usually used for processing. The brake pad 01 is generally subjected to the processes of grooving, rough grinding, beveling and fine grinding in sequence along the conveying direction of the conveying device 021, and these processes are all carried out inside the closed cover 022. In the prior art, as described in the background technology, in order to ensure the processing quality, the surface of the brake pad 01 to be processed needs to be cleaned between each process. Currently, a negative pressure adsorption system is generally used for cleaning. The system mainly includes adsorption ports arranged at each process position and a conveying pipe 024 connected to each adsorption port. Since the abrasive of the brake pad 01 contains colloid components, grinding chips with colloid will be generated during the processing. These grinding chips are easy to form highly viscous rubber powder after being heated. These rubber powders are easy to accumulate on the inner wall of the conveying pipe 024, especially at the bend, under the action of negative pressure. When the accumulated matter reaches a certain weight or the negative pressure is unstable, the accumulated matter will fall off and fall through the suction port onto the surface to be processed of the brake pad 01, causing contamination of the processed surface and affecting the quality of subsequent processing. At the same time, in order to achieve an effective cleaning effect, the existing technology requires a large negative pressure suction force, which also leads to the problem of high energy consumption of the equipment.

[0041] refer to Figure 2-Figure 4In this embodiment, a combination grinding and cleaning system for an anti-falling brake pad 01 is installed on a closed cover 022 of a combined grinder 02. The system adopts a new cleaning solution: by separating the machining process from the cleaning process and adopting a multi-stage adsorption structure, a more thorough cleaning effect of the brake pad 01 is achieved. Specifically, the system is composed of a plurality of groups of grinding chip cleaning devices 10, each group of grinding chip cleaning devices 10 includes a multi-stage adsorption pipe structure 11, a crushable anti-falling mechanism 12, and a curved conveying pipe 13 that are sequentially connected along the adsorption flow direction of the grinding chips. The multi-stage adsorption pipe structure 11 is connected to the inside of the closed cover 022, and the curved conveying pipe 13 is connected to the conveying pipeline system.

[0042] In order to achieve the goal of cleaning in different time periods, the conveying device 021 is set to an interval conveying mode. When one of the processes is being carried out, the conveying device 021 stops running and the abrasive debris adsorption of the process is carried out. For this purpose, the multi-stage adsorption tube structure 11 is set into multiple groups of adsorption branch components 110 according to the process position, and each group of adsorption branch components 110 is specifically responsible for adsorbing the abrasive debris generated by the corresponding process.

[0043] Specifically, the multi-stage adsorption tube structure 11 includes two groups of adsorption branch pipe assemblies 110, and the two groups of adsorption branch pipe assemblies 110 respectively adsorb two consecutive grinding processes; each group of adsorption branch pipe assemblies 110 includes at least two adsorption pipes 1101, and the lower ends of the multiple adsorption pipes 1101 are connected to the interior of the closed cover body 022 through a connecting plate 104, and the upper ends are connected to the crushable anti-falling mechanism 12; in this embodiment, each group of adsorption branch pipe assemblies 110 is provided with three adsorption pipes 1101, so each group of grinding chip cleaning devices 10 has six adsorption pipes 1101, and the six adsorption pipes 1101 are evenly distributed along the circumference.

[0044] Furthermore, the plurality of adsorption pipes 1101 are arranged in a cone shape with the upper portion being gathered and the lower portion being diffused. The diffused lower portion enables the plurality of adsorption pipes 1101 to clean a wider range of the surface of the brake pad 01, and the upper portion is gathered to adapt to the size of the curved delivery pipe 13.

[0045] To solve the key problem in the prior art: the colloid components contained in the abrasive of the brake pad 01 are easy to form sticky blocks during the cleaning process, and these sticky blocks are easy to form accumulations on the inner wall of the curved conveying pipe 13. When accumulated to a certain extent, they will fall off and fall along the curved conveying pipe 13 to the surface to be processed of the brake pad 01, affecting the subsequent processing quality. To solve this problem, this embodiment designs a crushable anti-falling mechanism 12:

[0046] refer to Figure 4-Figure 5The crushable anti-drop mechanism 12 is conical in shape, and includes an isolation cover 121, an anti-drop structure 122 installed in the isolation cover 121, and a crushable structure 123. The lower end of the isolation cover 121 is connected to a plurality of adsorption pipes 1101, and the upper end is connected to the curved conveying pipe 13. This structure can not only prevent the accumulation from falling and contaminating the brake pad 01, but also crush the sticky blocks to improve the cleaning efficiency.

[0047] The anti-falling structure 122 includes a first receiving and circulating plate 1221 and a second receiving and circulating plate 1222 in sequence along the flow direction of the cleaning material. The first receiving and circulating plate 1221 and the second receiving and circulating plate 1222 are relatively fixedly connected via a connecting shaft 124, and the connecting shaft 124 is connected to a driving motor (the driving motor is not shown in the figure). The setting of the two receiving and circulating plates forms a "double-layer protection" mechanism: the first receiving and circulating plate 1221 includes a circulation hole 1201 and a first closed portion 1202. There are multiple circulation holes 1201, three in this embodiment, and they correspond to each group of adsorption pipes 1101 respectively; the second receiving and circulating plate 1222 includes a circulation grid 1203 and a second closed portion 1024, and the multiple circulation holes 1201 are completely located below the second closed portion 1024, and the circulation grid 1203 is completely located above the first closed portion 1202. This staggered configuration forms a "protective maze" structure: when clean waste chips flow upward, they can continue to move through the flow holes 1201 and the flow grid 1203; and when the accumulation in the upper pipe falls off, it will first be blocked by the second closed part 1024. Even if small particles pass through the flow grid 1203, they will be intercepted by the first closed part 1202 below, thereby completely blocking the channel for the waste chips to fall back in physical structure, effectively preventing the waste chips from contaminating the processed surface of the brake pad 01.

[0048] Furthermore, in order to ensure that the clean waste can flow smoothly to the circulation grid 1203 and avoid accumulation at the lower end of the second closed part 1024, the second receiving circulation plate 1222 is specially inclined. Specifically, the second receiving circulation plate 1222 is inclined, and one end of the circulation grid 1203 is relatively higher than one end of the second closed part 1024. This inclined structure utilizes the synergistic effect of gravity and airflow: when the clean waste rises to the second receiving circulation plate 1222, due to the inclination of the plate surface, the airflow will be deflected along the inclined surface, forming a component force pointing to the circulation grid 1203. At the same time, if waste falls on the second closed part 1024, it will also slide to the lower end along the inclined surface under the action of gravity, and the lower end is facing the circulation grid 1203. This not only ensures that the waste will not accumulate at the lower end of the second closed part 1024, but also improves the efficiency of the waste passing through the circulation grid 1203.

[0049] The anti-drop structure 122 achieves two key functions by cooperating with the multi-stage adsorption tube structure 11: one is to ensure the special cleaning of each process, and the other is to prevent cleaning waste from contaminating the brake pad 01. The specific working process is as follows:

[0050] During the cleaning process, the anti-drop structure 122 will be rotated and adjusted according to the needs of the current process. When the previous process is being carried out, the anti-drop structure 122 is rotated so that the three flow holes 1201 of the first receiving flow plate 1221 are accurately aligned and connected with the three adsorption pipes 1101 corresponding to the process; when the next process is entered, the anti-drop structure 122 is rotated again so that the three flow holes 1201 are aligned and connected with the three adsorption pipes 1101 of the next process.

[0051] During this rotation adjustment process, the first receiving circulation plate 1221 and the second receiving circulation plate 1222 always keep their relative positions fixed and rotate synchronously. This design ensures that no matter where the anti-falling structure 122 rotates to, the waste accumulation falling from the curved conveying pipe 13 can be effectively intercepted: either directly received by the second sealing part 1024, or received by the first sealing part 1202 after passing through the circulation grid 1203. Through this dual protection mechanism, waste is fundamentally prevented from falling back and contaminating the processing surface of the brake pad 01.

[0052] The crushing structure 123 is coaxially connected to the anti-drop structure 122 via a connecting shaft 124, and is mainly used to process sticky waste formed during the cleaning process. The crushing structure 123 adopts a "two-stage processing" mechanism: the first stage is a cutting blade 1232, and the second stage is a crushing fan 1231. The crushing fan 1231 has its own motor to provide power for the entire structure.

[0053] This two-stage design is based on the practical discovery that when only the crushing fan 1231 is used, it is difficult to effectively process large sticky waste chips because the waste chips pass through the fan for a short time. To solve this problem, a cutting blade 1232 is added below the crushing fan 1231. The cutting blade 1232 is coaxially connected to the bottom of the crushing fan 1231, driven to rotate by the motor of the crushing fan 1231, and fixed to the upper part of the connecting shaft 124 by a coaxial sleeve connection.

[0054] Its working process is a continuous two-stage treatment: when the waste chips move upward under the action of airflow, they are first pre-treated by the high-speed rotating cutting blade 1232 to cut the large pieces of sticky waste chips into small particles, and then these pre-treated small particles are further crushed by the crushing fan 1231 during the continued upward process, thereby realizing efficient treatment of the waste chips.

[0055] In order to ensure the sealing and smooth transition connection of the entire cleaning system, special treatment is made in the structural design: a connecting disc 105 is set at the bottom end of the interior of the isolation cover 121, and the isolation cover 121 is placed between the connecting disc 105 and the multi-stage adsorption tube structure 11. Six connecting through holes 1051 are opened on the connecting disc 105, which are connected to multiple adsorption pipes 1101 one by one. At the same time, the first receiving and circulating plate 1221 and the connecting disc 105 are coaxially arranged, and a circumferential side plate 1205 surrounding the outer peripheral wall of the connecting disc 105 is added to the first receiving and circulating plate 1221, forming a complete sealing channel, effectively preventing waste chips from leaking from the gap, and ensuring the working efficiency of the cleaning system.

[0056] Embodiment 2:

[0057] Based on Example 1, this embodiment has been improved to address a key issue in the long-term operation of the cleaning system. During the normal cleaning process, some waste chips will inevitably adhere to the inner wall of the curved conveying pipe 13 and the conveying pipe system. In order to prevent these adhered waste chips from accumulating too much and affecting the system performance, this embodiment has designed a pipeline self-cleaning mechanism: when the combined grinder 02 stops processing the brake pad 01, the waste chips on the inner wall of the pipeline can be blown off to the crushable anti-drop mechanism 12 through air pressure backblowing for unified treatment.

[0058] To achieve this function, this embodiment optimizes the system structure. Figure 6-Figure 7 , mainly including the following aspects:

[0059] 1. Optimization of adsorption pipeline layout:

[0060] Each set of adsorption branch pipe components 110 is equipped with two adsorption pipes 1101 , so a set of abrasive cleaning device 10 has four adsorption pipes 1101 in total. Accordingly, four connecting through holes 1051 are provided, and a third closed portion 1052 is formed on the connecting disc 105 .

[0061] 2. Angle configuration:

[0062] The four connecting through holes 1051 are distributed at a special angle: three consecutive central angles of 60° are formed between adjacent through holes;

[0063] The third closed portion 1052 is located between the first and last connecting through holes 1051 at a central angle of 180°;

[0064] The two flow holes 1201 maintain a central angle of 60° to ensure that they can be accurately docked with the adsorption pipe 1101 and completely located above the third sealing portion 1052 .

[0065] 3. Self-cleaning working process:

[0066] When the system needs to perform pipeline self-cleaning, follow the steps below:

[0067] Step 1. Select the time period for stopping the processing of brake pad 01;

[0068] Step 2. Rotate and adjust the first receiving flow plate 1221 to adjust the two flow holes 1201 to be directly above the third sealing portion 1052;

[0069] Step 3: Apply reverse air pressure to the pipeline system to drive the attached waste chips to move toward the anti-falling device;

[0070] Step 4. The waste will be intercepted at multiple levels: some will fall into the second receiving part, and some will fall into the first receiving part through the flow grid 1203. Even if some waste passes through the flow hole 1201, it will be intercepted by the third sealing part 1052;

[0071] Step 5. After stopping the air pressure, clean up the waste collected in each closed part.

[0072] This improved design significantly improves the maintenance performance of the system: it realizes the self-maintenance function of the cleaning system, avoids the trouble of manual cleaning of pipes, extends the service life of the system, and ensures long-term and stable cleaning effects.

[0073] It should be noted that the specific parameters involved in the present invention are all preferred implementations, not the only limiting values. For example, the number of adsorption pipes, the number of connecting through holes and their center angles, the number of flow holes, etc., can all be appropriately adjusted according to actual production needs. At the same time, those skilled in the art can make adjustments or improvements to the specific implementations of the present invention according to specific application scenarios based on the basic idea of ​​the present invention, and these adjustments or improvements should be regarded as the scope of protection of the present invention. In addition, other structures or connection methods not elaborated in detail in the present invention are conventional technical means in the field and will not be repeated here.

[0074] The present invention effectively solves the key problems in the existing brake pad combination grinding and cleaning system by adopting the innovative design of multi-stage adsorption and crushable anti-shedding. It not only improves the cleaning efficiency and reduces energy consumption, but also realizes the function of preventing waste chips from falling back and polluting and the self-cleaning of the pipeline system, and has important practical value.

Claims

1. A cleaning system for the machining surface of a brake pad in a combination grinder, characterized in that: include: A combined grinding machine (02), the combined grinding machine (02) having a closed cover (022), used for performing grooving, rough grinding, beveling and fine grinding processes on a brake pad (01); A plurality of groups of grinding chip cleaning devices (10) are installed on the closed cover (022), each group of the grinding chip cleaning devices (10) comprising a multi-stage adsorption pipe structure (11), a crushable anti-falling mechanism (12) and a curved conveying pipe (13) in sequence along the flow direction of the cleaning waste chips, the multi-stage adsorption pipe structure (11) being connected to the inside of the closed cover (022), and the curved conveying pipe (13) being connected to the conveying pipeline system; The multi-stage adsorption tube structure (11) comprises two groups of adsorption branch pipe components (110), each group of adsorption branch pipe components (110) comprises a plurality of adsorption pipes (1101) arranged in a cone shape with the upper part converging and the lower part diffusing; the two groups of adsorption branch pipe components (110) respectively correspond to two adjacent processes and are used to clean the surface of the brake pad (01) in different time periods; The crushable anti-falling mechanism (12) comprises an isolation cover (121) and an anti-falling structure (122); the lower end of the isolation cover (121) is connected to the plurality of adsorption pipes (1101), and the upper end is connected to the curved conveying pipe (13); the anti-falling structure (122) is used to prevent cleaning waste from falling back and contaminating the brake pad (01); The anti-falling structure (122) comprises a first receiving circulation plate (1221) and a second receiving circulation plate (1222), wherein the first receiving circulation plate (1221) and the second receiving circulation plate (1222) are relatively fixedly connected via a connecting shaft (124); the first receiving circulation plate (1221) comprises a circulation hole (1201) and a first closing portion (1202), and the second receiving circulation plate (1222) comprises a circulation grid (1203) and a second closing portion (1024), wherein the circulation hole (1201) is completely located below the second closing portion (1024), and the circulation grid (1203) is completely located above the first closing portion (1202); The operation process is as follows: when one of the processes is being carried out, the conveying device of the combined grinding machine (02) stops running, and a corresponding group of adsorption branch pipe components (110) cleans the waste chips generated by the process. The cleaned waste chips are blocked and protected by a crushable anti-falling mechanism (12) and then transported to the conveying pipeline system through a curved conveying pipe (13).

2. The cleaning system for the machined surface of the brake pad in the combined grinding machine according to claim 1, characterized in that: The second receiving circulation plate (1222) is arranged at an angle, and one end of the circulation grid (1203) is relatively higher than one end of the second sealing portion (1024).

3. The cleaning system for the machined surface of the brake pad in the combined grinding machine according to claim 1, characterized in that: The crushable anti-falling mechanism (12) further comprises a crushable structure (123), wherein the crushable structure (123) is coaxially connected to the anti-falling structure (122) via the connecting shaft (124), and comprises a crushing fan (1231) and a cutting blade (1232), wherein the cutting blade (1232) is coaxially connected below the crushing fan (1231).

4. The cleaning system for the machined surface of the brake pad in the combined grinding machine according to claim 3, characterized in that: The cutting blade (1232) is coaxially sleeved on the upper part of the connecting shaft (124) and is driven to rotate by the motor of the crushing fan (1231).

5. The cleaning system for the machined surface of the brake pad in the combined grinding machine according to claim 1, characterized in that: A connecting disc (105) is provided at the bottom end of the interior of the isolation cover (121), and the connecting disc (105) is provided with a plurality of connecting through holes (1051). The connecting through holes (1051) pass through the lower end of the isolation cover (121) and are in communication with the adsorption pipe (1101).

6. The cleaning system for the machined surface of the brake pad in the combined grinding machine according to claim 5, characterized in that: The first receiving and circulating plate (1221) is coaxially arranged with the connecting disc (105), and the first receiving and circulating plate (1221) is provided with a circumferential side plate (1205) surrounding the outer peripheral wall of the connecting disc (105).

7. The cleaning system for the machined surface of the brake pad in the combined grinding machine according to claim 5, characterized in that: A third closed portion (1052) is formed on the connecting disc (105), and the flow hole (1201) can be completely located above the third closed portion (1052).

8. The cleaning system for the machined surface of the brake pad in the combined grinding machine according to claim 7, characterized in that: Each group of the adsorption branch pipe components (110) is provided with two adsorption pipes (1101); there are four connecting through holes (1051); three consecutive central angles formed by adjacent connecting through holes (1051) are 60°; the third closed portion (1052) is located between the first and last connecting through holes (1051) whose central angles are 180°; there are two circulation holes (1201); the central angles of the two circulation holes (1201) are 60°.

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