A preparation system for automobile brake pad substrate

Abstract

The present application relates to a preparation system for a substrate of an automobile brake pad, which includes a mixer for mixing raw materials, a forming module for forming raw materials, a hardening furnace for hardening the formed brake pad substrate, and a preparation controller; the forming module includes an annular conveyor and a plurality of material laying components for layering and unloading arranged in sequence along the annular conveyor, a hot pressing forming machine for hot pressing processing, a cold pressing forming machine for cold pressing processing, and a material taking component, the annular conveyor includes a frame and an annular bearing plate, and a plurality of groups of brake pad forming molds are conveyed on the annular bearing plate, the hot pressing forming machine includes a hot pressing frame, a hot pressing punch, a hot pressing movable plate, and a hot pressing base, the hot pressing movable plate is fixedly connected to the hot pressing punch, and the hot pressing base is located below the hot pressing movable plate and the top is in contact with the annular bearing plate. The present application has the effect of effectively improving the preparation efficiency and preparation quality of the brake pad substrate.

Description

Technical Field

[0001] The present application relates to the field of brake pad substrate molding and preparation, and in particular to a system for preparing a brake pad substrate for an automobile. Background Art

[0002] Disc brake pads are one of the key components of modern automobile braking systems, and their performance directly affects the safety of automobile driving. The materials of disc brake pads can be divided into three types: organic, semi-metallic and ceramic. Organic disc brake pads use organic friction materials, such as organic resins, fibers and metal powders. This friction material has good braking performance, low noise and good wear resistance. In addition, organic disc brake pads can also improve their tensile, impact and bending strength by adding chemical synthetic fiber fabrics, and reinforcing fiber mesh and steel bars can be added to the brake pads to increase their strength.

[0003] In order to improve the strength of the brake pad, the existing organic disc brake pad preparation process often adopts a multi-layer pressure division method to form the brake pad matrix. That is, the layer material (such as chemical fiber mesh, reinforced fiber mesh, metal mesh, glass fiber mesh, etc.) is laid into the mold, the feeder sprinkles the organic friction material and resin binder on the layer material and scrapes it evenly, and the hot press is started to perform hot pressing to form the first layer of the matrix. Repeat the above process to lay the layer material into the mold and cover it with the first layer of the matrix, the feeder sprinkles the material again and smoothes it, and finally the hot press is used again to perform hot pressing to form a brake pad matrix composed of multiple layers of matrix. The brake pad manufactured in this way uses the layer material to strengthen the stability and durability of the brake pad matrix structure, and by stacking the organic friction material layers up and down and arranging the glass fiber mesh or mesh between the organic friction material layers, the pressure can be effectively dispersed and transmitted, thereby reducing the direct contact and friction between the organic friction material layers, and avoiding the damage of the organic friction material layers due to local overheating. However, the multi-layer partial pressure method is used, because multiple hot pressings are performed and each hot pressing must take into account the influence of the previous hot pressing, which makes it difficult to control the curing temperature curve. Too long time in the high temperature zone will lead to over-curing of the resin, while insufficient temperature and poor temperature control will easily lead to manufacturing defects such as stratification, inclusions, debonding, and porosity. In addition, in the process of multi-layer additive hot pressing, grain boundary migration problems are prone to occur, causing the bonding interface to become tortuous, which in turn affects the structural stability and performance of the brake pad. If the brake pad substrate is prepared by first laying multiple layers of material and then hot pressing, it is easy to cause the brake pad structure to be loose due to the excessive thickness of the material layer. Therefore, how to improve the quality of brake pads on the basis of simplifying the brake pad preparation process is a problem to be solved. Summary of the invention

[0004] In order to solve the above problems, the present application provides a system for preparing a substrate for an automobile brake pad.

[0005] In a first aspect, the present application provides a system for preparing a substrate for an automobile brake pad, which adopts the following technical solution:

[0006] A preparation system for a brake pad substrate for an automobile, comprising a mixer for mixing raw materials, a molding module for molding the raw materials, a hardening furnace for hardening the molded brake pad substrate, and a preparation controller; the mixer, the molding module, and the hardening furnace are all in communication connection with the preparation controller, and the preparation controller controls the mixer, the molding module, and the hardening furnace to prepare the brake pad substrate according to a production plan;

[0007] The forming module includes a ring conveyor and multiple groups of material laying components for laying and unloading, a hot pressing molding machine for hot pressing processing, a cold pressing molding machine for cold pressing processing and a material picking component arranged in sequence along the ring conveyor, the material picking component is arranged across the ring conveyor with one end located at the front end of the cold pressing molding machine and the other end located at the rear end of the cold pressing molding machine; the ring conveyor includes a conveyor frame and an annular carrying plate, multiple groups of brake pad forming molds are conveyed on the annular carrying plate, the hot pressing molding machine includes a hot pressing frame, a hot pressing punch, a hot pressing movable plate and a hot pressing base, the hot pressing movable plate is fixedly connected to the hot pressing punch, the hot pressing base is located below the hot pressing movable plate and the top is abutted against the ring bearing plate, for heating the annular carrying plate and the brake pad forming mold.

[0008] Preferably, four groups of push die components are arranged on the conveyor frame along the annular bearing plate, and the four groups of push die components all include horizontally arranged push cylinders and push punches, and the telescopic directions of adjacent push cylinders are perpendicular to each other; the output end of the push cylinder is connected to the push punch, and the push punch includes a reinforcing column and an elastic buffer sleeve mounted on the reinforcing column.

[0009] Preferably, the brake pad molding mold includes a protective ring and a mold body, the protective ring is sleeved on the periphery of the mold body, the mold body is provided with a molding cavity, a guide column is provided in the middle of the molding cavity along the vertical direction, the guide column is penetrated by a lower mold and an upper mold, and the lower mold and the upper mold are both slidably set in the molding cavity.

[0010] Preferably, a guide frustum with an isosceles trapezoidal cross-section is provided at the top of the lower mold along the circumference of the guide column.

[0011] Preferably, the material picking assembly includes a material picking frame straddling the conveyor frame and a material receiving platform for receiving the formed brake pad substrate, an X-axis linear guide is arranged on the material picking frame in the horizontal direction, the slider of the X-axis linear guide is connected to a synchronous material picking cross plate, and a mold picking cylinder is arranged at one end of the synchronous material picking cross plate close to the hot pressing molding machine, the mold picking cylinder is arranged in the vertical direction and the output end is connected to a mold suction cup for sucking the upper mold; a material picking cylinder is arranged at one end of the synchronous material picking cross plate close to the cold pressing molding machine, the material picking cylinder is arranged in the vertical direction and the output end is connected to a brake pad suction nozzle for sucking the brake pad substrate.

[0012] Preferably, a plurality of driving holes are provided at the bottom of the mold body, and a lifting cylinder for lifting the lower mold is provided at the bottom of the annular supporting plate, and the output end of the lifting cylinder is inserted into the driving hole to lift the lower mold after the mold removal cylinder removes the upper mold in the molding cavity.

[0013] Preferably, the material laying assembly includes a mesh laying component for laying a reinforcing mesh in the lower mold, a material discharger for quantitatively feeding materials into the lower mold, and a smoothing component for smoothing the material in the lower mold, which are arranged in sequence along the conveying direction of the ring conveyor mold. The smoothing component includes a smoothing cylinder and a driving platform arranged in sequence above the conveying frame in the vertical direction. The output end of the smoothing cylinder is connected to a smoothing scraper for smoothing the material. The driving platform includes an electric rotating platform and a combined cylinder installed at the output end of the electric rotating platform. The telescopic end of the combined cylinder is connected to a combined plug for inserting into multiple driving holes.

[0014] Preferably, the preparation controller controls the mixer, the molding module and the hardening furnace according to the production plan to prepare the brake pad substrate, specifically including the following steps:

[0015] The preparation controller acquires the production plan to generate production requirements, wherein the production requirements include performance requirements, size requirements and quantity requirements, and the performance requirements include one or more of particle size requirements, organic friction material type requirements, hardness requirements, toughness requirements, self-sharpening requirements, thermal conductivity requirements, electrical conductivity requirements, wear resistance requirements and grindability requirements;

[0016] Generate a matrix preparation plan through matching with a preset data matching model according to production requirements, wherein the data matching model is a machine learning model obtained through training with historical data, and the matrix preparation plan includes a brake pad forming mold, a matrix formula, preparation control parameters, and preparation process information;

[0017] The scheduling instructions are generated according to the matrix preparation plan, and the staff transports the raw materials and the brake pad molding mold to the mixer and the molding module respectively according to the scheduling instructions;

[0018] The preparation controller sends the preparation control parameters to the mixer, the molding module and the hardening furnace for parameter setting;

[0019] Generate preparation instructions based on preparation process information, control the mixer to evenly mix the raw materials, then control the molding module to mold the raw materials to obtain the brake pad matrix initial material, and finally control the hardening furnace to harden the brake pad matrix initial material to obtain the required brake pad matrix.

[0020] Preferably, the step of generating a preparation instruction according to the preparation process information to control the forming module to perform forming processing on the raw material to obtain the brake pad matrix primary material specifically comprises the following steps:

[0021] Generate preparation instructions according to the preparation process information, control the ring conveyor to sequentially convey the lower mold to multiple groups of material laying components according to the preparation instructions, and control the multiple groups of material laying components to lay various raw materials and reinforcing mesh into the lower mold;

[0022] According to the preparation instruction, the material taking component is controlled to take out the upper mold of the brake pad forming mold that has completed the forming process and install it on the lower mold paved with raw materials and reinforcing mesh;

[0023] According to the preparation instruction, the ring conveyor is controlled to transport the brake pad forming mold after mold closing to the hot pressing molding machine, and the hot pressing molding machine is controlled to perform hot pressing and curing on the raw materials in the brake pad forming mold to form a brake pad matrix molding material;

[0024] According to the preparation instruction, the ring conveyor is controlled to convey the brake pad matrix molding material after hot pressing to the cold pressing molding machine, and the cold pressing molding machine is controlled to perform cold pressing and densification processing on the brake pad matrix molding material in the brake pad molding mold to obtain the brake pad matrix primary material;

[0025] According to the preparation instructions, the material taking component is controlled to remove the upper mold of the brake pad forming mold containing the brake pad matrix raw material and cover it on the lower mold covered with raw materials and reinforcing mesh in the previous process, and the material taking component is controlled to take the brake pad matrix raw material out of the lower mold.

[0026] Preferably, generating a matrix preparation plan by matching a preset data matching model according to production requirements specifically includes the following steps:

[0027] Generate several alternative preparation plans based on production requirements through pre-set data matching models;

[0028] According to the preparation process information of each alternative preparation scheme, a hot pressing temperature control conversion curve during hot pressing molding is drawn, and the scheme score of each alternative preparation scheme is calculated by a preset scheme score calculation formula, and the preset scheme score calculation formula is specifically:

[0029]

[0030] Among them, C is the preset standard raw material cost reference value, B is the raw material cost of the alternative preparation solution; n is the total number of brake pad matrix performance requirements, Q i is the performance value of the i-th performance requirement item in the performance requirement of the workpiece generated by the alternative preparation solution, P i The performance requirement value of the i-th performance requirement item of the brake pad substrate; t is the hot pressing processing time when the alternative preparation scheme is used for forming processing, W t The variable temperature operation time of hot pressing for alternative preparation scheme, W max The maximum processing temperature for hot pressing of the alternative preparation scheme, W min is the minimum processing temperature for hot pressing for the alternative preparation scheme, W is the average temperature change per unit time for hot pressing for the alternative preparation scheme, T is the recommended time for hot pressing during the preset molding process; X1 is the cost scoring coefficient, X2 is the performance scoring coefficient, X3 is the hot pressing difficulty scoring coefficient, and X1, X2, and X3 are all set by the management personnel;

[0031] The alternative preparation schemes are ranked based on the scheme scores, and the alternative preparation scheme with the highest scheme score is selected as the matrix preparation scheme.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. Through the setting of the molding module, the required raw materials and the reinforcing net are sequentially laid into the brake pad molding mold through multiple groups of auxiliary material components, replacing the previous multi-layer partial pressing method of hot pressing one layer of reinforcing net at a time, and the raw materials are orderly laid into the brake pad molding mold at one time, and then the brake pad matrix molding material is obtained by hot pressing by a hot pressing molding machine, which can effectively simplify the matrix molding process and reduce the difficulty of controlling the curing temperature curve, avoid the problem of over-curing of the resin due to multiple hot pressing of the brake pad and the tortuous bonding interface caused by grain boundary migration, and help to improve the structural stability and performance of the brake pad; after completing the hot pressing molding, the ring conveyor transports the brake pad molding mold to the cold pressing molding machine for cold pressing processing, and obtains a dense and stable brake pad matrix initial material, which helps to improve the density and strength of the brake pad matrix, and realizes precise control of the size of the brake pad matrix, so as to effectively improve the preparation efficiency and preparation quality of the brake pad matrix;

[0034] 2. Through the setting of the guide truncated table, the various reinforcing nets on the brake pad substrate can be layered and fixed based on the difference in inner diameter through its own inclined surface, ensuring that the reinforcing net can stably maintain its position in the lower mold, so that the brake pad substrate after the reinforcing net is formed can effectively disperse and transmit pressure, thereby reducing direct contact and friction between organic friction material layers, avoiding damage to the organic friction material layer due to local overheating, and further improving the molding quality of the brake pad; in addition, through the setting of the guide truncated table, the amount of material used in the invalid part of the center of the brake pad substrate can be effectively reduced, saving the production cost of the brake pad;

[0035] 3. The multi-layer raw materials in the brake pad molding mold are hot-pressed once by the hot-pressing molding machine, which greatly reduces the difficulty of controlling the resin curing temperature curve during the hot-pressing process, and avoids the problem that the brake pad is over-cured due to multiple hot-pressing and the bonding interface becomes tortuous due to grain boundary migration. At the same time, the hot-pressing base performs auxiliary heating on the annular carrier plate and the brake pad molding mold it abuts. On the basis of effective hot-pressing efficiency, the hot-pressing base heats the annular carrier plate synchronously, which can be transferred to the brake pad molding mold on both sides of the inlet and outlet of the hot-pressing molding machine, so as to achieve the insulation of the brake pad and the preheating of the raw materials, which is convenient for the subsequent cold-pressing work to proceed smoothly, and avoid the phenomenon of cracks in the brake pad caused by rapid cooling due to external climate factors, so as to effectively improve the molding quality of the brake pad;

[0036] 4. For multiple alternative preparation schemes generated by matching the data matching model, score each alternative preparation scheme from the aspects of raw material cost, finished product performance and difficulty of hot pressing curing temperature control during hot pressing molding. On the basis of ensuring product cost and performance, priority is given to alternative preparation schemes with short temperature change operation time and small temperature change operation range as matrix preparation schemes, which reduces the difficulty of hot pressing temperature control, helps to improve product quality stability and improve yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of a system for preparing a substrate for an automobile brake pad in an embodiment of the present application;

[0038] Figure 2 This is a system block diagram of a system for preparing a substrate for an automobile brake pad in an embodiment of the present application;

[0039] Figure 3 is a system block diagram of a molding module in an embodiment of the present application;

[0040] Figure 4 It is a structural schematic diagram of the ejection mold component in the embodiment of the present application;

[0041] Figure 5 is a cross-sectional schematic diagram of a brake pad forming mold in an embodiment of the present application;

[0042] Figure 6 It is a structural schematic diagram of the material taking component in the embodiment of the present application;

[0043] Figure 7 It is a structural schematic diagram of the smoothing component in the embodiment of the present application;

[0044] Figure 8 It is a structural schematic diagram of a hot pressing forming machine in an embodiment of the present application;

[0045] Fig. 9 is a schematic diagram of a method for preparing a brake pad substrate in an embodiment of the present application;

[0046] Fig.10 is a flow chart of a method for forming a brake pad substrate in an embodiment of the present application;

[0047] Fig.11 It is a flow chart of the method for matching and generating a matrix preparation scheme in an embodiment of the present application.

[0048] Explanation of the reference numerals: 1. mixer; 2. forming module; 3. hardening furnace; 4. preparation controller; 5. annular conveyor; 51. conveyor frame; 52. annular bearing plate; 521. lifting cylinder; 53. brake pad forming mold; 531. protective collar; 532. mold body; 533. forming cavity; 534. guide column; 535. lower mold; 536. upper mold; 537. guide frustum; 538. driving hole; 54. ejector component; 541. ejector cylinder; 542. ejector punch; 543. reinforcing column; 544. elastic buffer sleeve; 6. laying component; 61. laying net component ; 62. Material discharger; 63. Smoothing parts; 631. Smoothing cylinder; 632. Driving platform; 633. Smoothing scraper; 634. Electric rotating platform; 635. Combined cylinder; 636. Combined plug; 7. Hot pressing molding machine; 71. Hot pressing frame; 72. Hot pressing punch; 73. Hot pressing moving plate; 74. Hot pressing base; 8. Cold pressing molding machine; 9. Material picking assembly; 91. Material picking frame; 911. X-axis linear guide; 912. Synchronous material picking cross plate; 913. Mold picking cylinder; 914. Mold suction cup; 915. Material picking cylinder; 916. Brake pad suction nozzle; 92. Material collecting platform. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-Figure 11 This application is described in further detail.

[0050] The present application embodiment discloses a system for preparing a substrate for an automobile brake pad. Figure 1-Figure 3, a preparation system for a brake pad substrate for an automobile, comprising a mixer 1 for mixing raw materials, a molding module 2 for molding the raw materials, a hardening furnace 3 for hardening the molded brake pad substrate, and a preparation controller 4. The mixer 1, the molding module 2, and the hardening furnace 3 are all connected to the preparation controller 4 in communication, and the preparation controller 4 controls the mixer 1, the molding module 2, and the hardening furnace 3 to prepare the brake pad substrate according to the production plan. The molding module 2 comprises an annular conveyor 5, and a plurality of material laying components 6 for laying and unloading arranged in sequence along the annular conveyor 5, a hot pressing molding machine 7 for hot pressing processing, a cold pressing molding machine 8 for cold pressing processing, and a material taking component 9. A plurality of brake pad molding molds 53 are conveyed on the annular carrier plate 52. The material taking component 9 is arranged across the annular conveyor 5, and one end is located at the front end of the cold pressing molding machine 8, and the other end is located at the rear end of the cold pressing molding machine 8. Through the arrangement of the mixer 1, the molding module 2 and the hardening furnace 3, it is convenient for the preparation controller 4 to accurately control the brake pad preparation process according to the production plan, so as to obtain a brake pad matrix that meets the needs of users. Among them, through the setting of the forming module 2, the required raw materials and reinforcing mesh are laid into the brake pad forming mold 53 in sequence through multiple groups of auxiliary material components, replacing the previous multi-layer partial pressing method of hot pressing one layer of reinforcing mesh at a time, and the raw materials are laid into the brake pad forming mold 53 in an orderly manner at one time, and then hot-pressed by the hot pressing molding machine 7 to obtain the brake pad matrix molding material, which can effectively simplify the matrix molding process and reduce the difficulty of controlling the curing temperature curve, avoid the problem of over-curing of the resin due to multiple hot pressing and the bonding interface becoming tortuous due to grain boundary migration, and help to improve the structural stability and performance of the brake pad; after completing the hot pressing molding, the ring conveyor 5 transports the brake pad forming mold 53 to the cold pressing molding machine 8 for cold pressing processing to obtain a brake pad matrix initial material with a dense and stable structure, which helps to improve the density and strength of the brake pad matrix, and achieves precise control of the brake pad matrix size, so as to effectively improve the preparation efficiency and preparation quality of the brake pad matrix.

[0051] Reference Figure 1 and Figure 4The annular conveyor 5 includes a conveyor frame 51 and an annular bearing plate 52. Four sets of push die components 54 are arranged on the conveyor frame 51 along the annular bearing plate 52. The four sets of push die components 54 all include a push cylinder 541 and a push punch 542 arranged horizontally, and the telescopic directions of adjacent push cylinders 541 are perpendicular to each other. The output end of the push cylinder 541 is connected to the push punch 542, and the push punch 542 includes a reinforcing column 543 and an elastic buffer sleeve 544 sleeved on the reinforcing column 543. Through the arrangement of the four sets of push die assemblies, the circulation of multiple brake pad forming dies 53 on the annular bearing plate 52 can be stably driven to ensure the stable molding of the brake pad substrate. Through the cooperation of the elastic buffer sleeve 544 and the reinforcing column 543, on the basis of stably pushing the brake pad substrate molding die, the rigid contact between the reinforcing column 543 and the brake pad substrate molding die is avoided, which helps to improve the service life of the equipment.

[0052] Reference Figure 1 and Figure 5 The brake pad forming mold 53 includes a protective collar 531 and a mold body 532, and the protective collar 531 is sleeved on the outer periphery of the mold body 532. The mold body 532 is provided with a forming cavity 533, and a guide column 534 is provided in the middle of the forming cavity 533 along the vertical direction. The guide column 534 is penetrated by a lower mold 535 and an upper mold 536, and the lower mold 535 and the upper mold 536 are both slidably arranged in the forming cavity 533. The provision of the protective collar 531 can protect the mold body 532, avoid damage caused by rigid contact between adjacent mold bodies 532, reduce material vibration, and help the brake pad forming mold 53 to be stably transported on the ring conveyor 5. A guide truncated table 537 with an isosceles trapezoidal cross section is provided at the top of the lower mold 535 along the circumference of the guide column 534. By setting the guide truncated platform 537, the various reinforcing nets on the brake pad substrate can be layered and fixed based on the difference in inner diameters through its own inclined surface, ensuring that the reinforcing nets can stably maintain their positions in the lower mold 535, so that the brake pad substrate after the reinforcing nets are formed can effectively disperse and transmit pressure, thereby reducing direct contact and friction between organic friction material layers, avoiding damage to the organic friction material layers due to local overheating, and further improving the molding quality of the brake pad. In addition, by setting the guide truncated platform 537, the amount of material used in the invalid center of the brake pad substrate can be effectively reduced, saving the production cost of the brake pad.

[0053] Reference Figure 1 and Figure 6The material taking component 9 includes a material taking frame 91 straddling the conveyor frame 51 and a material receiving platform 92 for receiving the brake pad substrate after molding. An X-axis linear guide 911 is arranged horizontally on the material taking frame 91, and the slider of the X-axis linear guide 911 is connected to a synchronous material taking horizontal plate 912. A mold taking cylinder 913 is arranged at one end of the synchronous material taking horizontal plate 912 close to the hot press molding machine 7. The mold taking cylinder 913 is arranged in the vertical direction and the output end is connected to a mold suction cup 914 for sucking the upper mold 536. A material taking cylinder 915 is arranged at one end of the synchronous material taking horizontal plate 912 close to the cold press molding machine 8. The material taking cylinder 915 is arranged in the vertical direction and the output end is connected to a brake pad suction nozzle 916 for sucking the brake pad substrate. Through the setting of the material picking component 9, when the brake pad forming mold 53 is transported to the bottom of the material picking component 9 after the molding process is completed, the X-axis linear guide 911 drives the synchronous material picking cross plate 912 to move, the mold picking cylinder 913 moves to the top of the brake pad forming mold 53, and the material picking cylinder 915 moves to the top of the material receiving platform 92; the mold picking cylinder 913 drives the mold suction cup 914 to move down to absorb the upper mold 536 of the brake pad forming mold 53, and the formed brake pad matrix initial material is exposed; the material picking start drives the brake pad suction nozzle 916 to move down to place the brake pad sucked in the previous round on the material receiving platform 92; after the mold picking and material discharge are completed synchronously, the X-axis linear guide 911 drives the synchronous material picking cross plate 912 to reset, and the mold picking cylinder 913 carries the upper mold 536 moves to the top of the lower mold 535 at the inlet of the hot pressing molding machine 7 where the material is laid, and the material taking cylinder 915 moves to the top of the lower mold 535 where the initial material of the brake pad substrate is exposed at the outlet of the cold pressing molding machine 8; the mold taking cylinder 913 installs the upper mold 536 on the lower mold 535 where the material is laid, and the material taking cylinder 915 controls the brake pad suction nozzle 916 to move down to absorb the brake pad, so that the mold covering and material taking are completed simultaneously, and the above steps are repeated to reciprocate and realize the four processes of mold lifting (mold taking), mold installation, material taking, and material discharge, and the four processes are simplified into two, which further simplifies the brake pad molding process, combines the mold lifting in the material taking process and the mold covering before hot pressing, reduces the use of the upper mold 536, and helps to improve the brake pad molding efficiency.

[0054] Reference Figure 5 and Figure 6 A plurality of driving holes 538 are provided at the bottom of the mold body 532, and a lifting cylinder 521 for lifting the lower mold 535 is provided at the bottom of the annular bearing plate 52. The output end of the lifting cylinder 521 is inserted into the driving hole 538 to lift the lower mold 535 after the mold removal cylinder 913 removes the upper mold 536 in the molding cavity 533. Through the arrangement of the lifting cylinder 521 and the driving hole 538, after the upper mold 536 of the brake pad molding mold 53 is removed, the lifting cylinder 521 inserts the output end into the driving hole 538 to lift the lower mold 535 and the brake pad matrix initial material, so that the brake pad suction nozzle 916 can stably and conveniently take the material.

[0055] Reference Figure 1 and Figure 7 The material laying component 6 includes a mesh laying component 61 for laying a reinforcing mesh in the lower mold 535, a material discharger 62 for quantitatively feeding materials into the lower mold 535, and a smoothing component 63 for smoothing the materials in the lower mold 535, which are arranged in sequence along the mold conveying direction of the ring conveyor 5. The material discharger 62 and the mesh laying component 61 are prior art and are not described in detail here. The smoothing component 63 includes a smoothing cylinder 631 arranged in sequence above the conveyor frame 51 in the vertical direction and a driving platform 632 arranged at the bottom of the conveyor frame 51. The output end of the smoothing cylinder 631 is connected to a smoothing scraper 633 for smoothing the material. The driving platform 632 includes an electric rotating platform 634 and a combined cylinder 635 installed at the output end of the electric rotating platform 634. The telescopic end of the combined cylinder 635 is connected to a combined plug 636 for inserting into a plurality of driving holes 538. After the discharger 62 puts a certain amount of raw materials into the lower mold 535, the smoothing cylinder 631 drives the smoothing scraper 633 to press down into the mold body 532. At the same time, the joint cylinder 635 drives the joint plug 636 to insert into the driving hole 538 of the mold body 532 through the pre-opened hole on the annular bearing plate 52. The electric rotating platform 634 starts to drive the mold body 532 and the lower mold 535 to rotate, so that the smoothing scraper 633 smoothes the rotating raw materials in the lower mold 535, which is convenient for the uniform laying of multiple layers of raw materials and reinforcing mesh, and helps to improve the uniformity of the raw material laying in the brake pad molding mold 53, thereby effectively improving the molding quality of the brake pad.

[0056] Reference Figure 1 and Figure 8 The hot pressing molding machine 7 includes a hot pressing frame 71, a hot pressing punch 72, a hot pressing movable plate 73 and a hot pressing base 74. The hot pressing movable plate 73 is fixedly connected to the hot pressing punch 72. The hot pressing base 74 is located below the hot pressing movable plate 73 and the top is abutted against the annular supporting plate 52, which is used to heat the annular supporting plate 52 and the brake pad molding mold 53. The multi-layer raw materials in the brake pad molding mold 53 are hot-pressed once by the hot pressing molding machine 7, which greatly reduces the difficulty of controlling the resin curing temperature curve during the hot pressing process, and avoids the problem of over-curing of the resin and the bonding interface becoming tortuous due to grain boundary migration caused by multiple hot pressing of the brake pad. At the same time, the hot pressing base 74 assists in heating the annular carrier plate 52 and the brake pad molding mold 53 it abuts. On the basis of effective hot pressing efficiency, the hot pressing base 74 simultaneously heats the annular carrier plate 52, which can be transferred to the brake pad molding mold 53 on both sides of the inlet and outlet of the hot pressing molding machine 7, so as to achieve brake pad insulation and raw material preheating, facilitate subsequent cold pressing work to proceed smoothly, avoid the phenomenon of rapid cooling of the brake pad and cracks due to external climatic factors, and effectively improve the molding quality of the brake pad.

[0057] Reference Fig. 9The preparation controller controls the mixer, the molding module and the hardening furnace according to the production plan to prepare the brake pad matrix, which specifically includes the following steps:

[0058] A1. The preparation controller obtains the production plan to generate production requirements, which include performance requirements, size requirements and quantity requirements. The performance requirements include one or more of particle size requirements, organic friction material type requirements, hardness requirements, toughness requirements, self-sharpening requirements, thermal conductivity requirements, electrical conductivity requirements, wear resistance requirements and grindability requirements;

[0059] A2. Generate a matrix preparation plan through matching with a preset data matching model according to production requirements. The data matching model is a machine learning model obtained through training with historical data. The matrix preparation plan includes a brake pad forming mold, a matrix formula, preparation control parameters, and preparation process information. The training steps of the machine learning model are prior art and will not be repeated here.

[0060] A3. Generate scheduling instructions according to the matrix preparation plan, and the staff will transport the raw materials and brake pad molding molds to the mixer and molding module respectively according to the scheduling instructions;

[0061] A4. The preparation controller sends the preparation control parameters to the mixer, molding module and hardening furnace for parameter setting;

[0062] A5. Generate preparation instructions based on the preparation process information, control the mixer to evenly mix the raw materials, control the molding module to mold the raw materials to obtain the brake pad matrix raw material, and finally control the hardening furnace to harden the brake pad matrix raw material to obtain the required brake pad matrix. Subsequently, the annular brake pad matrix is ​​divided and punched to obtain an organic brake pad. The preparation controller generates a matrix preparation plan that meets user needs according to production needs through a data matching model, and controls the mixer, molding module and hardening furnace to stably move to realize the automation of brake pad matrix preparation and parameter setting, avoiding the phenomenon of manual setting of parameters based on experience leading to production accidents. On the basis of meeting production needs, it can promote the organic combination of multiple raw materials to give full play to the performance advantages of various raw materials, realize efficient preparation of brake pads, and effectively improve the efficiency and quality of brake pad preparation.

[0063] Reference Fig.10 According to the preparation process information, the preparation instructions are generated to control the molding module to perform molding processing on the raw materials to obtain the brake pad matrix primary material, which specifically includes the following steps:

[0064] B1. Material laying: Generate preparation instructions according to the preparation process information, control the ring conveyor to convey the lower mold to multiple sets of material laying components in sequence according to the preparation instructions, and control the multiple sets of material laying components to lay various raw materials and reinforcing mesh into the lower mold;

[0065] B2. Mold placement: According to the preparation instructions, the material taking component is controlled to take out the upper mold of the brake pad forming mold that has completed the forming process and install it on the lower mold covered with raw materials and reinforcing mesh;

[0066] B3. Hot pressing: According to the preparation instruction, the ring conveyor is controlled to transport the brake pad forming mold after mold closing to the hot pressing molding machine, and the hot pressing molding machine is controlled to hot press and solidify the raw materials in the brake pad forming mold to form the brake pad matrix molding material;

[0067] B4. Cold pressing: According to the preparation instruction, the ring conveyor is controlled to convey the brake pad matrix molding material after hot pressing to the cold pressing molding machine, and the cold pressing molding machine is controlled to perform cold pressing and densification processing on the brake pad matrix molding material in the brake pad molding mold to obtain the brake pad matrix primary material;

[0068] B5. Material collection: According to the preparation instructions, the material collection component is controlled to remove the upper mold of the brake pad molding mold containing the brake pad matrix raw material and cover it on the lower mold with raw materials and reinforcing mesh in the previous process, and the material collection component is controlled to remove the brake pad matrix raw material from the lower mold. Through the above steps, the brake pad molding process is realized by laying the raw materials and reinforcing mesh in sequence, hot pressing once and then cold pressing, which can effectively simplify the brake pad molding process and reduce the difficulty of controlling the curing temperature curve, avoid the problem of over-curing of the resin due to multiple hot pressing of the brake pad and the tortuous bonding interface caused by grain boundary migration, which helps to improve the structural stability and performance of the brake pad, and achieve precise control of the size of the brake pad matrix, so as to effectively improve the preparation efficiency and quality of the brake pad matrix.

[0069] Reference Fig.11 According to the production requirements, the matrix preparation plan is generated by matching the preset data matching model, which specifically includes the following steps:

[0070] C1. Generate several alternative preparation plans: Generate several alternative preparation plans through matching with a preset data matching model according to production requirements;

[0071] C2. Calculate the scheme score of each alternative preparation scheme: Draw the hot pressing temperature control conversion curve during hot pressing molding according to the preparation process information of each alternative preparation scheme, and calculate the scheme score of each alternative preparation scheme by using the preset scheme score calculation formula. The preset scheme score calculation formula is specifically:

[0072]

[0073] Among them, C is the preset standard raw material cost reference value, B is the raw material cost of the alternative preparation solution; n is the total number of brake pad matrix performance requirements, Q i is the performance value of the i-th performance requirement item in the performance requirement of the workpiece generated by the alternative preparation solution, Pi The performance requirement value of the i-th performance requirement item of the brake pad substrate; t is the hot pressing processing time when the alternative preparation scheme is used for forming processing, W t The variable temperature operation time of hot pressing for alternative preparation scheme, W max The maximum processing temperature for hot pressing of the alternative preparation scheme, W min is the minimum processing temperature for hot pressing for the alternative preparation scheme, W is the average temperature change per unit time for hot pressing for the alternative preparation scheme, T is the recommended time for hot pressing during the preset molding process; X1 is the cost scoring coefficient, X2 is the performance scoring coefficient, X3 is the hot pressing difficulty scoring coefficient, and X1, X2, and X3 are all set by the management personnel;

[0074] C3. Select the matrix preparation scheme: Sort the alternative preparation schemes based on the scheme score, and select the alternative preparation scheme with the highest scheme score as the matrix preparation scheme. For multiple alternative preparation schemes generated by the data matching model, score each alternative preparation scheme from the aspects of raw material cost, finished product performance, and difficulty of hot pressing curing temperature control during hot pressing molding. On the basis of ensuring product cost and performance, give priority to selecting alternative preparation schemes with short temperature change operation time and small temperature change operation range as the matrix preparation scheme, which reduces the difficulty of hot pressing temperature control, helps improve product quality stability, and improves the yield rate.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A system for preparing a substrate for an automobile brake pad, characterized in that: The invention comprises a mixer (1) for mixing raw materials, a molding module (2) for molding the raw materials, a hardening furnace (3) for hardening the molded brake pad matrix, and a preparation controller (4); the mixer (1), the molding module (2), and the hardening furnace (3) are all connected to the preparation controller (4) in communication, and the preparation controller (4) controls the mixer (1), the molding module (2), and the hardening furnace (3) to prepare the brake pad matrix according to a production plan; The forming module (2) comprises an annular conveyor (5) and a plurality of material laying components (6) for laying and unloading materials, a hot pressing molding machine (7) for hot pressing processing, a cold pressing molding machine (8) for cold pressing processing and a material taking component (9) arranged in sequence along the annular conveyor (5); the material taking component (9) is arranged across the annular conveyor (5) with one end located at the front end of the cold pressing molding machine (8) and the other end located at the rear end of the cold pressing molding machine (8); the annular conveyor (5) comprises a conveyor frame (51) and an annular bearing plate (52), a plurality of groups of brake pad forming dies (53) are conveyed on the annular carrier plate (52), the hot pressing forming machine (7) comprises a hot pressing frame (71), a hot pressing punch (72), a hot pressing movable plate (73) and a hot pressing base (74), the hot pressing movable plate (73) is fixedly connected to the hot pressing punch (72), the hot pressing base (74) is located below the hot pressing movable plate (73) and the top thereof is in contact with the annular carrier plate (52), and is used for heating the annular carrier plate (52) and the brake pad forming dies (53); The brake pad molding mold (53) comprises a protective collar (531) and a mold body (532), wherein the protective collar (531) is sleeved on the outer periphery of the mold body (532), and the mold body (532) is provided with a molding cavity (533), and a guide column (534) is arranged in the middle of the molding cavity (533) along the vertical direction, and the guide column (534) is penetrated by a lower mold (535) and an upper mold (536), and the lower mold (535) and the upper mold (536) are both slidably arranged in the molding cavity (533); The preparation controller controls the mixer, the molding module and the hardening furnace according to the production plan to prepare the brake pad substrate, which specifically includes the following steps: The preparation controller acquires the production plan to generate production requirements, wherein the production requirements include performance requirements, size requirements and quantity requirements, and the performance requirements include one or more of particle size requirements, organic friction material type requirements, hardness requirements, toughness requirements, self-sharpening requirements, thermal conductivity requirements, electrical conductivity requirements, wear resistance requirements and grindability requirements; Generate a matrix preparation plan through matching with a preset data matching model according to production requirements, wherein the data matching model is a machine learning model obtained through training with historical data, and the matrix preparation plan includes a brake pad forming mold, a matrix formula, preparation control parameters, and preparation process information; The scheduling instructions are generated according to the matrix preparation plan, and the staff transports the raw materials and the brake pad molding mold to the mixer and the molding module respectively according to the scheduling instructions; The preparation controller sends the preparation control parameters to the mixer, the molding module and the hardening furnace for parameter setting; Generate preparation instructions according to the preparation process information, control the mixer to evenly mix the raw materials, then control the molding module to mold the raw materials to obtain the brake pad matrix raw materials, and finally control the hardening furnace to harden the brake pad matrix raw materials to obtain the required brake pad matrix; The method of generating a preparation instruction according to the preparation process information to control the forming module to form the raw material to obtain the brake pad matrix primary material specifically includes the following steps: Generate preparation instructions according to the preparation process information, control the ring conveyor to sequentially convey the lower mold to multiple groups of material laying components according to the preparation instructions, and control the multiple groups of material laying components to lay various raw materials and reinforcing mesh into the lower mold; According to the preparation instruction, the material taking component is controlled to take out the upper mold of the brake pad forming mold that has completed the forming process and install it on the lower mold paved with raw materials and reinforcing mesh; According to the preparation instruction, the ring conveyor is controlled to transport the brake pad forming mold after mold closing to the hot pressing molding machine, and the hot pressing molding machine is controlled to perform hot pressing and curing on the raw materials in the brake pad forming mold to form a brake pad matrix molding material; According to the preparation instruction, the ring conveyor is controlled to convey the brake pad matrix molding material after hot pressing to the cold pressing molding machine, and the cold pressing molding machine is controlled to perform cold pressing and densification processing on the brake pad matrix molding material in the brake pad molding mold to obtain the brake pad matrix primary material; According to the preparation instruction, the material taking component is controlled to remove the upper mold of the brake pad forming mold containing the brake pad matrix raw material and cover it on the lower mold paved with raw materials and reinforcing mesh in the previous process, and the material taking component is controlled to take the brake pad matrix raw material from the lower mold; The method of generating a matrix preparation plan by matching a preset data matching model according to production requirements specifically includes the following steps: Generate several alternative preparation plans based on production requirements through pre-set data matching models; According to the preparation process information of each alternative preparation scheme, a hot pressing temperature control conversion curve during hot pressing molding is drawn, and the scheme score of each alternative preparation scheme is calculated by a preset scheme score calculation formula, and the preset scheme score calculation formula is specifically: Among them, C is the preset standard raw material cost reference value, B is the raw material cost of the alternative preparation solution; n is the total number of brake pad matrix performance requirements, Q i is the performance value of the i-th performance requirement item in the performance requirement of the workpiece generated by the alternative preparation solution, P i is the performance requirement value of the i-th performance requirement item of the brake pad substrate; t is the hot pressing processing time when the alternative preparation scheme is used for forming processing, W t The variable temperature operation time of hot pressing for alternative preparation scheme, W max The maximum processing temperature for hot pressing of the alternative preparation scheme, W min is the minimum processing temperature of the alternative preparation scheme for hot pressing, W is the average temperature change per unit time when the alternative preparation scheme is hot pressing, T is the recommended time for hot pressing during the preset molding process; X1 is the cost scoring coefficient, X2 is the performance scoring coefficient, X3 is the hot pressing difficulty scoring coefficient, and X1, X2, and X3 are all set by the management personnel; The alternative preparation schemes are ranked based on the scheme scores, and the alternative preparation scheme with the highest scheme score is selected as the matrix preparation scheme.

2. The system for preparing a substrate for an automobile brake pad according to claim 1, characterized in that: Four groups of push die components (54) are arranged on the conveyor frame (51) along the annular bearing plate (52), and the four groups of push die components (54) all include a push cylinder (541) and a push punch (542) arranged horizontally, and the telescopic directions of adjacent push cylinders (541) are perpendicular to each other; the output end of the push cylinder (541) is connected to the push punch (542), and the push punch (542) includes a reinforcing column (543) and an elastic buffer sleeve (544) sleeved on the reinforcing column (543).

3. The system for preparing a substrate for an automobile brake pad according to claim 1, characterized in that: A guide truncated cone (537) having an isosceles trapezoidal cross section is arranged at the top of the lower mold (535) along the circumference of the guide column (534).

4. The system for preparing a substrate for an automobile brake pad according to claim 1, characterized in that: The material picking assembly (9) includes a material picking frame (91) straddling the conveyor frame (51) and a material receiving platform (92) for receiving the brake pad substrate after molding. An X-axis linear guide rail (911) is arranged on the material picking frame (91) in the horizontal direction. The slider of the X-axis linear guide rail (911) is connected to a synchronous material picking cross plate (912). A mold picking cylinder (913) is arranged at one end of the synchronous material picking cross plate (912) close to the hot pressing molding machine (7). The mold picking cylinder (913) is arranged in the vertical direction and the output end is connected to a mold suction cup (914) for sucking the upper mold (536); a material picking cylinder (915) is arranged at one end of the synchronous material picking cross plate (912) close to the cold pressing molding machine (8). The material picking cylinder (915) is arranged in the vertical direction and the output end is connected to a brake pad suction nozzle (916) for sucking the brake pad substrate.

5. The system for preparing a substrate for an automobile brake pad according to claim 4, characterized in that: A plurality of driving holes (538) are provided at the bottom of the mold body (532), and a lifting cylinder (521) for lifting the lower mold (535) is provided at the bottom of the annular supporting plate (52). The output end of the lifting cylinder (521) is inserted into the driving hole (538) to lift the lower mold (535) after the mold removal cylinder (913) removes the upper mold (536) in the molding cavity (533).

6. The system for preparing a substrate for an automobile brake pad according to claim 5, characterized in that: The material laying component (6) comprises a mesh laying component (61) for laying a reinforcing mesh in a lower mold (535), a material discharger (62) for quantitatively feeding materials into the lower mold (535), and a smoothing component (63) for smoothing the materials in the lower mold (535), which are arranged in sequence along the mold conveying direction of the ring conveyor (5). The smoothing component (63) comprises a smoothing cylinder (631) arranged in sequence above the conveyor frame (51) in the vertical direction and a driving platform (632) arranged at the bottom of the conveyor frame (51). The output end of the smoothing cylinder (631) is connected to a smoothing scraper (633) for smoothing the materials. The driving platform (632) comprises an electric rotating platform (634) and a combined cylinder (635) installed at the output end of the electric rotating platform (634). The telescopic end of the combined cylinder (635) is connected to a combined plug (636) for inserting into a plurality of driving holes (538).

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