Brake clamp hanging bracket machining device and method

Abstract

The invention discloses a brake clamp hanging bracket machining device and method.The method comprises the steps that an equivalent flat plate structure model and size parameters of a main body structure are determined according to geometrical characteristics of the main body structure; laying according to the equivalent flat plate structure model and the size parameters to obtain a flat plate structure of the main body structure; carrying out hot-pressing bending treatment on the flat plate structure; laying operation is conducted according to a preset laying rule, and the fixed main shaft sleeve is obtained; and the main body structure and the fixed main shaft sleeve are connected through a plurality of composite material angle pieces and a plurality of bolts, and the brake clamp hanging bracket is obtained. According to the brake clamp hanging bracket, the carbon fibers are adopted as the composite material, the light weight of the brake clamp hanging bracket is achieved, and the brake clamp hanging bracket has the characteristics of high temperature resistance and corrosion resistance. By means of the brake clamp hanging bracket machining device, automatic production of the brake clamp hanging bracket can be achieved, the production efficiency is improved, and the product quality and the product consistency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit vehicles and brake systems, and in particular to a brake clamp hanger processing device and method. Background Art

[0002] With the rapid development of technical fields such as structural design, material science and intelligent manufacturing, the demand for lightweight modern vehicle transportation has gradually increased in recent years. Lightweighting is one of the important goals of vehicle design, aiming to increase the vehicle's transportation speed and reduce the vehicle's energy loss.

[0003] In the vehicle structure, the brake caliper unit is installed on the bogie, and realizes the service braking and release of braking functions through the interaction of internal components. The brake caliper unit is a key component of the vehicle braking system, and its performance directly affects the braking effect and driving safety of the vehicle.

[0004] In the use of brake caliper units, components such as hangers and brake levers not only need to withstand large braking forces, but also need to withstand environmental corrosion, high braking temperatures, and large vibration shocks. Since the operating conditions of brake caliper units are very harsh, hangers and brake levers in the prior art generally use traditional metal materials such as cast steel and ductile iron, and related theories and manufacturing processes have become mature. However, since a group of trains need to be equipped with multiple groups of brake caliper units, if they are made of metal materials, the overall weight of the entire train group will be heavier. Therefore, the lightweight design of the brake caliper unit plays a vital role in the lightweight process of the entire train group.

[0005] Under the premise of ensuring the mechanical properties of the brake caliper unit, the weight of the internal components of the brake caliper unit is reduced, and carbon fiber reinforced resin-based composite materials are used to replace traditional metal materials to achieve lightweight brake caliper units. Due to the complexity of the brake caliper unit structure and the difficulty in manufacturing new composite material structures, and in order to ensure the consistent performance of multiple groups of brake caliper units in a train set, a corresponding automated production process is urgently needed to achieve efficient preparation of brake calipers. Therefore, the present application provides a brake caliper hanger processing device and method to achieve lightweight brake caliper units.

[0006] This section is intended to provide a background or context to the embodiments of the invention recited in the claims. No admission is made that the description herein is prior art by inclusion in this section. Summary of the invention

[0007] An embodiment of the present invention provides a brake caliper hanger processing device, which is used to solve the problem that the brake caliper hanger made of traditional metal materials is heavy, so as to achieve lightweight brake caliper units. The brake caliper hanger processing device includes:

[0008] A hot bending die, a pressurized tooling structure, a wire laying machine and a brake caliper hanger; the brake caliper hanger is made of thermoplastic fiber reinforced composite material;

[0009] The pressurizing tool structure comprises: a first bending tool, a pressing tool, and a second bending tool;

[0010] The first bending tool is rotatably connected to one end of the pressing tool via a first rotating shaft; the second bending tool is rotatably connected to the other end of the pressing tool via a second rotating shaft;

[0011] The brake caliper hanger comprises: a fixed spindle sleeve and a main structure consisting of an upper plate, a lower plate and a connecting handle arranged between the upper plate and the lower plate;

[0012] When processing the brake caliper hanger, the inner side of the connecting handle is placed flat on the hot bending die, the upper plate and the lower plate are respectively clamped on the side of the hot bending die, the pressing tool is attached to the outer side of the connecting handle, and the first bending tool and the second bending tool are pressed down to attach to the surface of the lower plate and the upper plate respectively;

[0013] The wire laying machine is used to sequentially lay up the lower plate, the connecting handle and the upper plate to form the main structure, and to form the fixed main shaft sleeve by laying up the plates.

[0014] Furthermore, a first axial hole and a second axial hole are arranged on the upper plate; a third axial hole and a fourth axial hole are arranged on the lower plate; the first axial hole and the third axial hole are arranged in the same vertical direction, and the second axial hole and the fourth axial hole are arranged in the same vertical direction.

[0015] Furthermore, the device also includes: two L-shaped composite material angle pieces, a first bolt and a second bolt; the upper plate is provided with at least two first bolt holes, and the fixed spindle sleeve is provided with at least one second bolt hole; the first bolt cooperates with the first bolt hole to fix the horizontal part of the L-shaped composite material angle piece to the upper plate; the second bolt cooperates with the second bolt hole to fix the vertical part of the L-shaped composite material angle piece to the fixed spindle sleeve.

[0016] The embodiment of the present invention further provides a brake caliper hanger processing method, which is applied to the above-mentioned brake caliper hanger processing device to solve the problem of heavy weight of the traditional brake caliper hanger made of metal materials, so as to achieve lightweight brake caliper unit. The method comprises:

[0017] Determine the equivalent plate structure model and size parameters of the main structure according to the geometric characteristics of the main structure;

[0018] Laying layers according to the equivalent flat plate structure model and the size parameters to obtain the flat plate structure of the main structure;

[0019] Performing a hot pressing bending process on the flat plate structure;

[0020] Performing a laying operation according to a preset laying rule to obtain the fixed main shaft sleeve;

[0021] The brake caliper hanger is obtained by connecting the main structure and the fixed spindle sleeve through a plurality of composite material angle pieces and a plurality of bolts.

[0022] Furthermore, the step of performing ply laying according to the equivalent flat plate structure model and the size parameters to obtain the flat plate structure of the main structure includes:

[0023] Performing laser processing on the pre-selected composite material according to a preset temperature to melt the composite material;

[0024] Laying the melted composite material in a pre-set laying direction;

[0025] The laminated composite material is pressurized and shaped by a pressure roller to obtain the flat plate structure.

[0026] Furthermore, the plying is performed according to the equivalent flat plate structure model and the size parameters to obtain the flat plate structure of the main structure, and further includes:

[0027] During the laying process, when the composite material is laid to the edge of the equivalent flat plate structure model, the edge of the composite material is cut.

[0028] Further, the hot pressing and bending process of the flat plate structure comprises:

[0029] Placing the flat plate structure in a processing chamber for heating to obtain a softened flat plate structure;

[0030] The softened flat plate structure is pressurized and shaped by the hot bending die and the pressing tool to obtain a curved structure of the flat plate structure;

[0031] The curved structure is pressed in sequence by the first bending tool and the second bending tool according to a preset shaping sequence to obtain the main structure.

[0032] Furthermore, the laying operation is performed according to a preset laying rule to obtain the fixed main shaft sleeve, including:

[0033] The circular laying is performed according to the first wire laying trajectory, and the wire breaking process is performed at the junction of the beginning and the end of each circle of laying, until the circular diameter reaches the preset circular diameter;

[0034] Perform U-shaped laying according to the second wire laying trajectory until the diameter of the semicircle of the U-shaped structure reaches a preset diameter;

[0035] Parallel straight-line laying is performed according to the third wire laying trajectory to obtain the fixed main shaft sleeve.

[0036] Furthermore, after the flat plate structure is subjected to hot pressing and bending treatment, the method further comprises:

[0037] According to the preset shaft hole size and shaft hole position, the main structure is cut to obtain the first shaft hole, the second shaft hole, the third shaft hole and the fourth shaft hole.

[0038] Furthermore, before connecting the main structure and the fixed main shaft sleeve by using a plurality of composite material angle pieces and a plurality of bolts, the method further comprises:

[0039] According to the preset bolt hole size and bolt hole position, the main structure and the fixed spindle sleeve are cut to obtain a plurality of bolt holes.

[0040] The brake caliper hanger processing device and method provided by the embodiment of the present invention can obtain the flat plate structure of the main structure by determining the equivalent flat plate model and size parameters of the main structure of the brake caliper hanger, and laying the layers according to the equivalent flat plate model and size parameters. By performing hot pressing bending treatment on the flat plate structure, the curved shape of the main structure can be finalized. The fixed spindle sleeve can be obtained by performing the laying operation according to the preset laying rules. By performing wire breaking treatment at the end-to-end joint or intersection of the composite material layer, the overlap or gap between the composite material layers is avoided, and the uniformity and strength of the main structure can be ensured. The laying trajectory accuracy of the high-precision automatic wire laying machine is very important, and it is necessary to operate strictly according to the design drawings to ensure that the size and shape of the final brake caliper hanger structure meet the design requirements. The brake caliper hanger can be obtained by processing and finalizing the main structure and the fixed spindle sleeve respectively, and then fixedly connected by high-performance adhesives and bolts, thereby realizing the automatic production and manufacturing of the brake caliper hanger. The brake caliper hanger processed by the present invention can replace the traditional metal brake caliper hanger and can meet higher mechanical performance requirements. In addition, the brake caliper hanger of the present invention is suitable for complex working conditions such as low temperature, high temperature and corrosion faced by rail transit vehicles during operation. At the same time, the brake caliper hanger has undergone fatigue tests such as fatigue test, vibration impact test, low temperature test and salt spray test, which enhances the stability of the brake caliper hanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0042] Figure 1 It is a schematic diagram of the physical structure of a brake caliper hanger processing device in an embodiment of the present invention;

[0043] Figure 2 It is a schematic diagram of the physical structure of the brake caliper hanger in an embodiment of the present invention;

[0044] Figure 3 It is a schematic diagram of the physical structure of the fixed spindle sleeve and the upper plate of the brake caliper hanger in the embodiment of the present invention;

[0045] Figure 4 It is a structural schematic diagram of a hot press in an embodiment of the present invention;

[0046] Figure 5 It is a schematic diagram of the partial structure of the hot press machine in an embodiment of the present invention;

[0047] Figure 6 A schematic diagram of a process of a brake caliper hanger processing method according to an embodiment of the present invention;

[0048] Figure 7 It is a front view and a top view of the flat plate structure of the brake caliper hanger in an embodiment of the present invention;

[0049] Figure 8 It is a schematic flow chart of a method for processing a brake caliper hanger in another embodiment of the present invention;

[0050] Fig. 9 It is a schematic flow chart of a method for processing a brake caliper hanger in another embodiment of the present invention;

[0051] Fig.10 It is a schematic diagram of the ply laying of the fixed spindle sleeve of the brake caliper hanger in an embodiment of the present invention;

[0052] Fig.11 The figure is a schematic flow chart of a method for processing a brake caliper hanger in another embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0055] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0056] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0057] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0059] In order to realize the automated production of a brake caliper hanger with lightweight, high temperature resistance and corrosion resistance, the present invention provides a brake caliper hanger processing device, which improves production efficiency and reduces production costs through automated production, while also improving product quality and product consistency. The brake caliper hanger produced by the present invention is suitable for three-point hanging and four-point hanging brake calipers.

[0060] like Figure 1 As shown, the brake caliper hanger processing device 10 includes: a hot bending mold 11, a pressurizing tooling structure 12, a wire laying machine (not shown in the figure) and a brake caliper hanger.

[0061] The pressurizing tool structure 12 includes: a first bending tool 101 , a pressing tool 102 and a second bending tool 103 .

[0062] The first bending tool 101 is rotatably connected to one end of the pressing tool 102 via a first rotating shaft 104 . The second bending tool 103 is rotatably connected to the other end of the pressing tool 102 via a second rotating shaft 105 .

[0063] like Figure 1 and Figure 2 As shown, the brake caliper hanger 200 comprises: a fixed spindle sleeve 201 and a main structure 13 consisting of an upper plate 202, a lower plate 203 and a connecting handle 204 disposed between the upper plate 202 and the lower plate 203. The brake caliper hanger 200 is made of a thermoplastic fiber reinforced composite material.

[0064] like Figure 1 and Figure 2 As shown, when processing the main structure 13 of the brake caliper hanger 200, the inner side of the connecting handle 204 (i.e., the side away from the brake disc when the brake caliper hanger 200 is installed on the EMU train) is placed flat on the hot bending mold 11, the upper plate 202 and the lower plate 203 are respectively clamped on the side of the hot bending mold 11, and the pressing tool 102 is attached to the outer side of the connecting handle 204 (i.e., the side close to the brake disc when the brake caliper hanger 200 is installed on the EMU train), and the first bending tool 101 and the second bending tool 103 are pressed down to fit on the surface of the lower plate 203 and the upper plate 202 respectively.

[0065] The wire laying machine (not shown in the figure) is used to lay up the lower plate 203, the connecting handle 204 and the upper plate 202 in sequence to form the main structure 13, and to form the fixed main shaft sleeve 201 by laying up the layers.

[0066] In this embodiment, the brake caliper hanger adopts thermoplastic fiber reinforced composite material to achieve lightweight of the brake caliper hanger, so that the brake caliper hanger has the characteristics of light weight, corrosion resistance and fatigue resistance. In addition, the wire laying machine realizes the laying of the main structure and the fixed spindle sleeve of the brake caliper hanger respectively, so that the main structure and the fixed spindle sleeve can have strong stability and consistency. Through the hot bending mold and pressurized tooling structure in the brake caliper hanger processing device, the hot pressing shaping of the main structure of the brake caliper hanger is realized, so that the main structure has strong toughness and fatigue resistance.

[0067] Thermoplastic fiber reinforced composite materials can be any of the following: continuous carbon fiber reinforced polyetheretherketone prepreg (Continuous Carbon Fiber Reinforced PEEK Prepreg, CF / PEEK), short fiber reinforced thermoplastic composite materials (Short Fiber Reinforced Thermoplastics, SFT) long fiber reinforced thermoplastic composite materials (Long Fiber Reinforced Thermoplastics, LFT), glass fiber reinforced thermoplastic composite materials (Glass Fiber Reinforced Thermoplastics, GFT) hybrid fiber reinforced thermoplastic composite materials (Hybrid Fiber Reinforced Thermoplastics), etc.

[0068] CF / PEEK uses polyetheretherketone (PEEK) as the matrix resin and continuous carbon fiber as the reinforcement phase, combining the high strength, high modulus and lightweight characteristics of carbon fiber with the excellent high temperature resistance, chemical corrosion resistance and mechanical properties of polyetheretherketone. The use of thermoplastic fiber reinforced composite materials has achieved the characteristics of lightweight, corrosion resistance and fatigue resistance of the brake caliper hanger.

[0069] like Figure 1 As shown, the first bending fixture 101 and the second bending fixture 103 are concave-shaped flat plate structures, wherein the notch of the concave-shaped flat plate structure is a rectangular notch.

[0070] In one embodiment, the upper surface and the side surfaces of the pressing tool 102 are both planes, and the lower surface of the pressing tool 102 is the first molding surface 106 .

[0071] In one embodiment, the lower surface and the side surface of the hot bending mold 11 are both planes, and the upper surface of the hot bending mold 11 is the second molding surface 107. The first molding surface 106 and the second molding surface 107 are arranged opposite to each other, and when the main structure 13 of the brake caliper hanger 200 is processed, the connecting handle 204 is located between the first molding surface 106 and the second molding surface 107.

[0072] In one embodiment, a heating device is provided on the first molding surface 106 and the second molding surface 107 for hot pressing the main structure 13 of the brake caliper hanger. The first molding surface 106 and the second molding surface 107 are both curved structures, and the curved structures need to be designed and customized according to the main structure 13 of the brake caliper hanger.

[0073] like Figure 2 As shown, a first axial hole 206 and a second axial hole 207 are provided on the upper plate 202. A third axial hole 208 and a fourth axial hole 209 are provided on the lower plate 203. The first axial hole 206 and the third axial hole 208 are provided in the same vertical direction, and the second axial hole 207 and the fourth axial hole 209 are provided in the same vertical direction.

[0074] In one embodiment, the first axial hole 206 and the second axial hole 207 are symmetrically arranged at both ends of the upper plate 202, close to the inner concave side 210 of the upper plate 202. The third axial hole 208 and the fourth axial hole 209 are symmetrically arranged at both ends of the lower plate 203, close to the inner concave side 210 of the lower plate. The first axial hole 206 and the third axial hole 208 are coaxially arranged, that is, the axes of the first axial hole 206 and the third axial hole 208 are on a straight line. The second axial hole 207 and the fourth axial hole 209 are coaxially arranged, that is, the axes of the second axial hole 207 and the fourth axial hole 209 are on a straight line. Among them, the first axial hole 206, the second axial hole 207, the third axial hole 208 and the fourth axial hole 209 are all circular through holes.

[0075] The concave side 210 of the upper plate 202 is one side of the upper plate 202 in the length direction, parallel to the axial direction of the wheel axle of the EMU train (i.e., perpendicular to the forward direction of the EMU train). The width direction of the upper plate 202 is the forward direction of the EMU train. The concave side 210 of the lower plate 203 is one side of the lower plate 203 in the length direction, parallel to the axial direction of the wheel axle of the EMU train (i.e., perpendicular to the forward direction of the EMU train). The width direction of the lower plate 203 is the forward direction of the EMU train.

[0076] The concave side 210 of the upper plate 202 and the concave side 210 of the lower plate 203 are both provided with transition fillets, which can be large-size fillets to avoid stress concentration problems. The other side 211 of the upper plate 202 and the other side 211 of the lower plate 203 are both planes.

[0077] In one embodiment, a spindle hole 205 is provided on the fixed spindle sleeve 201, and the spindle hole 205 is sleeved on a rigid shaft. The fixed spindle sleeve 201 is used to connect with the bogie through the rigid shaft. The fixed spindle sleeve 201 is a cylindrical structure, so that the brake caliper hanger 200 can be fixed on the bogie through the rigid shaft. The axial direction of the fixed spindle sleeve 201 is arranged along the length direction of the upper plate 202, that is, it is arranged parallel to the axial direction of the wheel axle of the EMU train.

[0078] In one embodiment, during the operation of the EMU train, the fixed main shaft sleeve 201 is subjected to longitudinal impact stress ( Figure 2 The first axial hole, the second axial hole, the third axial hole and the fourth axial hole are all subjected to transverse tensile stress ( Figure 2 Horizontal arrow direction as shown in the figure).

[0079] like Figure 2 and Figure 3 As shown, the brake caliper hanger 200 further includes: two L-shaped composite material angle pieces 301 , a first bolt 302 , and a second bolt 303 .

[0080] The upper plate 202 is provided with at least two first bolt holes, and the fixed spindle sleeve 201 is provided with at least one second bolt hole. The first bolt 302 cooperates with the first bolt hole to fix the horizontal part of the L-shaped composite material angle piece 301 to the upper plate 202. The second bolt 303 cooperates with the second bolt hole to fix the vertical part of the L-shaped composite material angle piece 301 to the fixed spindle sleeve 201.

[0081] In one embodiment, the first bolt holes of the upper plate 202 are through holes, and the first bolts 302 are standard bolts. The horizontal portion of the L-shaped composite material corner piece 301 is fixed to the upper plate 202 by two first bolts 302 respectively cooperating with the corresponding first bolt holes.

[0082] In one embodiment, the second bolt hole for fixing the main shaft sleeve 201 can be a through hole or two non-through holes; the second bolt 303 can be a stud bolt or two standard bolts, but the present application is not limited thereto.

[0083] If the second bolt hole is a through hole, pass the second bolt 303 through the second bolt hole, and respectively sleeve the vertical parts of the two L-shaped composite material angle pieces 301 on both ends of the second bolt 303, and fix the two L-shaped composite material angle pieces 301 to the fixed spindle sleeve 201 through nuts.

[0084] If the second bolt hole is a non-through hole, the vertical portion of an L-shaped composite material angle piece 301 is fixed to the fixed spindle sleeve 201 through the cooperation of the second bolt 303 and the corresponding second bolt hole and a nut.

[0085] The brake caliper hanger processing device 10 further includes: a hot press, a high temperature processing chamber, and a robotic arm.

[0086] In one embodiment, the high temperature processing chamber, the wire laying machine and the hot press are placed within the space that the robot arm can operate. The high temperature processing chamber is used to soften and deform the main structure 13 of the brake caliper hanger, so as to facilitate subsequent pressurization and shaping. The robot arm is used to move the brake caliper hanger 200 during the processing. The hot press is used to pressurize and shape the main structure 13 of the brake caliper hanger.

[0087] like Figure 4 and Figure 5 As shown, the hot press 400 includes: an upper crossbeam 401 , an upper pressing plate 402 , a lower pressing plate 403 , an intermediate movable workbench 404 , a hydraulic cylinder 405 , a lower base 406 and a plurality of columns 407 .

[0088] The main support structure of the hot press 400 is composed of four columns 407, an upper beam 401 and a lower base 406. Four through holes are provided on the upper beam 401, the middle movable workbench 404 and the lower base 406. The upper beam 401, the middle movable workbench 404 and the lower base 406 are sequentially sleeved on the columns 407 through the columns 407 and their corresponding through holes.

[0089] The upper cross beam 401 is fixedly arranged at the upper end of the column 407, the lower base 406 is fixedly arranged at the lower end of the column 407, and the intermediate movable workbench 404 is arranged between the upper cross beam 401 and the lower base 406. The intermediate movable workbench 404 can move up and down along the column 407.

[0090] The upper pressing plate 402 is fixed below the upper cross beam 401, and the lower pressing plate 403 is fixed on the middle movable workbench 404. During the processing of the brake caliper hanger, the pressurizing tooling structure 12 is fixed below the upper pressing plate 402, and the hot bending die 11 is set on the lower pressing plate 403.

[0091] The hydraulic cylinder 405 is fixedly disposed between the intermediate movable workbench 404 and the lower base 406 , and the hydraulic cylinder 405 can drive the intermediate movable workbench 404 to move up and down along the column 407 .

[0092] In one embodiment, one end of the piston rod of the hydraulic cylinder 405 is fixed below the intermediate movable workbench 404 by multiple bolts, and the other end of the piston rod of the hydraulic cylinder 405 is fixed to the lower base 406 by multiple bolts. The hydraulic cylinder 405 is used to provide a vertical force, which can push the intermediate movable workbench 404 to squeeze the upper pressing plate 402, and can also pull the intermediate movable workbench 404 away from the upper pressing plate 402, thereby achieving hot pressing and shaping of the main structure 13 of the brake caliper hanger.

[0093] In this embodiment, the brake caliper hanger adopts thermoplastic fiber reinforced composite material, which realizes the lightweight of the brake caliper hanger, so that the brake caliper hanger has the characteristics of light weight, corrosion resistance and fatigue resistance. In addition, the wire laying machine realizes the laying of the main structure and the fixed spindle sleeve of the brake caliper hanger respectively, so that the main structure and the fixed spindle sleeve can have strong stability and consistency. Through the hot bending mold and the pressurizing tooling structure in the brake caliper hanger processing device, the hot pressing shaping of the main structure of the brake caliper hanger is realized, so that the main structure has strong toughness and fatigue resistance. The L-shaped composite material angle piece can provide better support for the main structure and the fixed spindle sleeve, and enhance the stability of the brake caliper hanger. The brake caliper hanger processing device can realize the automated mass production of the brake caliper hanger, which not only improves the production efficiency, but also reduces the production cost, and also improves the product quality and product consistency. The brake caliper hanger of the present invention can replace the traditional metal brake caliper hanger and can meet higher mechanical performance requirements. The brake caliper hanger is not only suitable for three-point hanging and four-point hanging brake calipers, but also suitable for complex working conditions such as low temperature, high temperature and corrosion faced by rail transit vehicles during operation. On the premise of meeting the braking requirements, the goal of reducing the weight and increasing the speed of EMU trains is achieved.

[0094] The present invention also provides a brake caliper hanger processing method, which is applied to the brake caliper hanger processing device 10. Figure 6 As shown, the brake caliper hanger processing method includes steps 601 to 605.

[0095] Step 601 : Determine an equivalent flat plate structure model and size parameters of the main structure 13 according to the geometric features of the main structure 13 of the brake caliper hanger 200 .

[0096] Step 602: Lay layers according to the equivalent flat plate structure model and size parameters to obtain a flat plate structure of the main structure 13.

[0097] Step 603: Perform hot pressing and bending treatment on the flat plate structure of the main structure 13 .

[0098] Step 604: performing a laying operation according to a preset laying rule to obtain a fixed main shaft sleeve 201 .

[0099] Step 605: The main structure 13 and the fixed spindle sleeve 201 are connected by a plurality of composite material corner pieces 301 and a plurality of bolts to obtain the brake caliper hanger 200.

[0100] from Figure 6It can be seen from the process shown that in the embodiment of the present invention, by determining the equivalent flat plate model and size parameters of the main structure of the brake caliper hanger, and laying the layers according to the equivalent flat plate model and size parameters, the flat plate structure of the main structure can be obtained. By performing hot pressing and bending treatment on the flat plate structure, the curved shape of the main structure can be finalized. The fixed spindle sleeve can be obtained by performing the laying operation according to the preset laying rules. The brake caliper hanger can be obtained by processing and finalizing the main structure and the fixed spindle sleeve respectively, and then fixing and connecting them with high-performance adhesives and bolts, thereby realizing the automated production and manufacturing of the brake caliper hanger. The brake caliper hanger processed by the present invention can replace the traditional metal brake caliper hanger and can meet higher mechanical performance requirements. In addition, the brake caliper hanger of the present invention is suitable for complex working conditions such as low temperature, high temperature and corrosion faced by rail transit vehicles during operation. At the same time, the brake caliper hanger has been subjected to fatigue tests such as fatigue tests, vibration impact tests, low temperature tests and salt spray tests, thereby enhancing the stability of the brake caliper hanger.

[0101] like Figures 1 to 6 As shown, each step is explained in detail below.

[0102] Step 601 : Determine an equivalent flat plate structure model and size parameters of the main structure 13 according to the geometric features of the main structure 13 of the brake caliper hanger 200 .

[0103] Specifically, the geometric features of the main structure 13 of the brake caliper hanger 200 are collected and extracted by 3D modeling software, wherein the geometric features include stress distribution features and position distribution features of the brake caliper hanger 200 .

[0104] By performing mechanical analysis on the brake caliper hanger 200, the stress and direction of the brake caliper hanger 200 are determined. The stress includes: impact stress along the radial direction of the fixed spindle sleeve 201 and tensile stress along the radial direction of the shaft hole.

[0105] In one embodiment, according to the stress distribution characteristics of the brake caliper hanger 200 , it is determined that the main load-bearing direction of the main structure 13 of the brake caliper hanger 200 is the impact stress direction along the length direction of the connecting handle 204 .

[0106] By performing a position analysis on the brake caliper hanger 200 , the position relationship between the brake caliper hanger 200 , the cylinder and the brake disc is determined, and the position distribution characteristics are obtained.

[0107] According to the stress distribution characteristics and position distribution characteristics, the design Figure 7 The equivalent plate structure model is shown.

[0108] Since the main structure 13 of the brake caliper is a three-dimensional structure, in order to facilitate processing and manufacturing, the main structure 13 is unfolded into an equivalent flat plate structure, and the actual unfolded length of the equivalent flat plate structure is further determined. Due to the fiber arrangement characteristics and curing characteristics of the composite material, the equivalent flat plate structure will shrink in size during the hot pressing bending process. Therefore, in the actual production and processing process, the actual unfolded length of the equivalent flat plate structure is designed to be slightly longer than the unfolded length.

[0109] Specifically, Figure 7 As shown, the unfolded length of the upper plate 202 is 140 mm, the unfolded length of the lower plate 203 is 80 mm, and the unfolded length of the connecting handle 204 is 259 mm, so the total unfolded length is 479 mm. Since the main structure 13 will shrink in size after hot pressing and bending, the size parameters of the main structure 13 are corrected. The actual total unfolded length of the equivalent flat plate structure is set to 500 mm.

[0110] Step 602: Lay layers according to the equivalent flat plate structure model and size parameters to obtain a flat plate structure of the main structure 13.

[0111] Specifically, the present invention adopts a high-precision automatic wire placing machine to lay the flat plate structure on a horizontal forming platform of the high-precision automatic wire placing machine according to a pre-designed equivalent flat plate structure model and its size parameters.

[0112] In one embodiment, if Figure 7 As shown, the multiple circle parts shown by the dotted lines are the opening positions of the multiple axial holes of the upper plate 202 and the lower plate 203. During the plying process of the flat plate structure, no hole opening operation is performed to ensure the strength and integrity of the flat plate structure, thereby facilitating subsequent processing.

[0113] like Figure 8 As shown, step 602 includes steps 801 to 803.

[0114] Step 801: laser processing is performed on a pre-selected composite material to melt the composite material according to a preset temperature, wherein the preset temperature is 400 degrees Celsius.

[0115] In one embodiment, the high-performance thermoplastic composite material selected by the present invention is continuous carbon fiber reinforced polyetheretherketone prepreg (Continuous Carbon Fiber Reinforced PEEK Prepreg, CF / PEEK), which is composed of continuous carbon fiber and polyetheretherketone resin matrix, and has the characteristics of high temperature resistance, wear resistance and high mechanical properties.

[0116] Specifically, the composite material is heated to 400 degrees Celsius by a high-temperature laser to make the composite material melt and flow.

[0117] In one embodiment, laser heating has the advantages of fast heating speed, high temperature controllable precision and local heating, which can make the prepreg tape melt and flow quickly while avoiding unnecessary thermal effects on surrounding materials.

[0118] Step 802: Laying the melted composite material in layers according to a preset laying direction.

[0119] Specifically, the molten composite material is laid in a direction (i.e. Figure 7 The layers are laid in the direction of the middle arrow) and the lower layer plate 203, the connecting handle 204 and the upper layer plate 202 are laid sequentially in sequence by a high-precision automatic wire laying machine.

[0120] After the first layer of composite material is laid in the laying direction, another layer is laid in the laying direction on the first layer until the preset number of layers is reached. The preset number of layers is usually set to 5 or 10, but the present invention is not limited thereto.

[0121] Step 803: Pressing and shaping the laminated composite material by means of a pressure roller to obtain a flat plate structure.

[0122] Specifically, when the number of plies reaches a preset number of plies, the laid-up composite material is pressed onto a horizontal forming pedestal by the pressure rollers of a high-precision automatic wire laying machine, so that the laid-up composite material can be quickly cooled and solidified, and tightly combined with adjacent composite materials.

[0123] In one embodiment, the pressure roller can provide a certain pressure to make the composite material after layering closely bonded with the horizontal forming platform, which helps to remove bubbles in the composite material to ensure that the layers are closely fitted.

[0124] After pressurization and shaping, continue to lay the layers in the above-mentioned laying direction until the preset layer thickness is reached. Through repeated laying and pressurization and shaping, a flat plate structure of the main structure 13 can be obtained. Among them, the preset layer thickness can be set according to the needs of those skilled in the art, and the present invention is not limited thereto.

[0125] In one embodiment, during the laying process, when the composite material is laid to the edge of the equivalent flat plate structure model, the edge of the composite material is cut.

[0126] Specifically, in accordance with Figure 7 During the laying process in the laying direction shown, when the laying reaches the edge of the equivalent flat plate structure model, the edge of the composite material layer is cut, and then the laying operation is continued in the above-mentioned laying direction.

[0127] Since the structural shape and size parameters of the composite material ply need to match those of the equivalent flat plate structure model, cutting the edge of the composite material ply can ensure that the composite material ply can fit closely to the structural edge of the equivalent flat plate structure model, avoiding defects such as composite material accumulation or gaps, thereby ensuring the integrity of the entire flat plate structure.

[0128] Step 603: Perform hot pressing and bending processing on the flat plate structure.

[0129] Specifically, the formed flat plate structure is subjected to hot pressing and bending processing by using a pre-customized hot bending mold 11 and a pressurizing tooling structure 12 to form a three-dimensional main structure 13 of the brake caliper hanger 200 .

[0130] In one embodiment, the pre-customized hot bending mold 11 and the pressurizing tooling structure 12 are designed and processed according to the composite material structure design of the brake caliper hanger 200 by extracting the surface curvature characteristics of the three-dimensional model of the brake caliper hanger 200.

[0131] In one embodiment, the surface curvature features of the three-dimensional model of the brake caliper hanger 200 may be extracted using 3D modeling software.

[0132] In one embodiment, the hot bending die 11 and the pressurizing tooling structure 12 may be made of P20 steel, which has good mechanical properties and high temperature resistance.

[0133] like Fig. 9 As shown, step 603 includes steps 901 to 903.

[0134] Step 901: placing the flat plate structure in a high temperature processing chamber for heating to obtain a softened flat plate structure.

[0135] Specifically, the flat plate structure is clamped by a robot arm, placed in a high-temperature processing chamber, and heated to 150 degrees Celsius to obtain a softened flat plate structure.

[0136] In one embodiment, the temperature provided by the high temperature processing chamber (i.e., 150°C) needs to be slightly higher than the glass transition temperature (Tg) of the composite material, which can soften the flat plate structure and facilitate subsequent pressurization and bending. Among them, the glass transition temperature of continuous carbon fiber reinforced polyetheretherketone prepreg tape is generally 143°C.

[0137] Step 902: The softened flat plate structure is pressurized and shaped by the hot bending mold 11 and the pressing tool 102 to obtain a curved structure of the flat plate structure.

[0138] Specifically, the softened flat plate structure is taken out by the mechanical arm and placed on the hot bending mold 11 inside the hot press 400. The hot press 400 controls the pressing tool 102 to apply vertical downward pressure to the flat plate structure for press forming, so that the flat plate structure is bent according to the curved shape of the upper surface of the hot bending mold 11, which can ensure that the flat plate structure is initially attached to the hot bending mold 11.

[0139] Step 903 : Press the curved structure in sequence by the first bending tool 101 and the second bending tool 103 according to a preset shaping sequence to obtain a main structure 13 .

[0140] Specifically, Figure 1 As shown, the preliminarily formed connecting handle 204 is fixed on the hot bending mold 11 by a mechanical arm. The hot press 400 controls the first bending tool 101 and the second bending tool 103 to be bent as shown in FIG. Figure 1 By sequentially controlling the pressing tool 102, the first bending tool 101 and the second bending tool 103 to gradually perform pressurization and bending, the stress distribution of the curved structure can be uniform during the pressurization and bending process, thereby avoiding the problem of stress concentration.

[0141] In one embodiment, in order to fully form the above-mentioned curved structure under high temperature and high pressure, during the pressurized bending process, the hot bending mold 11 and the pressurized tooling structure 12 are heated and stabilized to 150 degrees Celsius by the hot press 400, and the pressure of the hot bending mold 11 and the pressurized tooling structure 12 are controlled to be maintained at 1.5MPa, and the pressure is maintained for 180 seconds. Thereby ensuring the stability and consistency of the main structure 13. After the pressure maintenance is completed, the temperature of the hot bending mold 11 and the pressurized tooling structure 12 is controlled to gradually drop to room temperature, so that the main structure 13 is cooled and shaped, and the pressurized tooling structure 12 is folded by the hot press 400. After the main structure 13 is cooled and shaped, the main structure 13 is clamped by a mechanical arm so that the main structure 13 can be demoulded smoothly.

[0142] After the flat plate structure is subjected to hot press bending, the method further comprises:

[0143] According to the preset shaft hole size and shaft hole position, the main structure 13 is cut to obtain a first shaft hole 206 , a second shaft hole 207 , a third shaft hole 208 and a fourth shaft hole 209 .

[0144] Specifically, the main structure 13 of the brake caliper hanger 200 after demolding is fixed on the fixture by a mechanical arm. According to the preset shaft hole size and shaft hole position, the four shaft holes of the main structure 13 are drilled by mechanical processing to form a first shaft hole 206, a second shaft hole 207, a third shaft hole 208 and a fourth shaft hole 209.

[0145] In one embodiment, the clamp is used to ensure that the main structure 13 remains stable during the cutting process to prevent the main structure 13 from being deformed or displaced under the action of the machining force. The structural shape of the clamp needs to be customized according to the shape and size of the main structure 13 to ensure that the clamp can provide sufficient support and clamping force.

[0146] Step 604: performing a laying operation according to a preset laying rule to obtain a fixed main shaft sleeve 201 .

[0147] Specifically, the fixed spindle sleeve 201 of the brake caliper hanger 200 is processed by a high-precision automatic wire laying machine. Fig.10 Laying operations are carried out in the laying direction shown.

[0148] Before performing the layer laying operation, the dimension parameters of the fixed spindle sleeve 201 structure need to be determined.

[0149] Specifically, the diameter of the spindle hole 205 of the fixed spindle sleeve 201 is 55 mm, that is, Fig.10 The distance between point C and point D shown in the figure is 55 cm; the semicircular diameter of the U-shaped structure of the fixed spindle sleeve 201 is 70 mm, that is, Fig.10 The distance between point A and point F shown in the figure is 70 mm.

[0150] like Fig.11 As shown, step 604 includes steps 1101 to 1103.

[0151] Step 1101: perform circular laying according to the first laying trajectory, and perform wire breaking processing at the junction of the beginning and the end of each layup until the circle diameter reaches the preset circle diameter. The preset circle diameter is 65 mm, that is, Fig.10 The distance between point B and point E shown in FIG. 1 is 65 mm.

[0152] Specifically, according to Fig.10 The composite material is laid in the first wire laying track shown, that is, laid in a circular track. The initial winding diameter is 55mm, that is, the diameter of the main shaft hole 205. When laying in a circular way, the wire is cut at the beginning and end of each circle of the laying layer, and then the laying operation of the next circle is carried out. Lay one circle after another along the circular track, and continuously expand the winding diameter until the winding diameter reaches 65mm and stops laying. Among them, the enlarged winding diameter of each circle is twice the width of the above-mentioned prepreg tape.

[0153] Step 1102: Perform U-shaped laying according to the second laying trajectory until the diameter of the semicircle of the U-shaped structure reaches a preset diameter. The preset diameter is 70 mm, that is, Fig.10 The distance between point A and point F shown in .

[0154] Specifically, according to Fig.10 The second laying track lays the composite material, that is, lays it according to a U-shaped track. Along the outer contour of the ring laid in step 1101, lay the composite material from the inside to the outside according to the U-shaped track until the diameter of the semicircle of the U-shaped structure reaches 70 mm.

[0155] Step 1103: Perform parallel straight-line laying according to the third wire laying trajectory to obtain a fixed main shaft sleeve 201 .

[0156] Specifically, according to Fig.10 The third laying trajectory lays the composite material, that is, lays it according to a parallel straight line trajectory to fill the empty space between the circular rings and arcs laid in step 1101 and step 1102. When laying parallel straight lines, the wire is cut off at the intersection with the circular ring trajectory in step 1101, which can ensure that the laying path of the composite material is clear and meets the design requirements.

[0157] Repeat step 1101 to step 1103 to perform layer-by-layer laying operations until a preset number of layers is reached to form a fixed spindle sleeve 201. The preset number of layers can be set according to the needs of those skilled in the art, and the present invention is not limited thereto.

[0158] like Figure 3 As shown, according to the preset bolt hole size and bolt hole position, the main structure 13 and the fixed spindle sleeve 201 are cut to obtain a plurality of bolt holes.

[0159] Specifically, the upper plate 202 is provided with at least two first bolt holes, and the fixed spindle sleeve 201 is provided with at least one second bolt hole. Figure 3 According to the bolt hole positions and preset bolt hole sizes shown in the figure, drilling operations are performed on both sides of the fixed spindle sleeve 201 and the upper plate 202 to form a plurality of bolt holes.

[0160] Step 605: The main structure 13 and the fixed spindle sleeve 201 are connected by composite material corner pieces 301 and bolts to obtain the brake caliper hanger 200.

[0161] Specifically, the first bolt holes of the upper plate 202 are through-holes. The horizontal portion of the L-shaped composite material corner piece 301 is fixed to the upper plate 202 by two first bolts 302 respectively cooperating with the first bolt holes corresponding thereto.

[0162] In one embodiment, the second bolt hole of the fixed spindle sleeve 201 may be a through hole or two non-through holes, but the present invention is not limited thereto.

[0163] If the second bolt hole is a through hole, the second bolt 303 is passed through the second bolt hole, and the two L-shaped composite material angle pieces 301 are respectively sleeved on both ends of the second bolt 303. The second bolt 303 cooperates with the second bolt hole to fix the vertical parts of the two L-shaped composite material angle pieces 301 to the fixed spindle sleeve 201.

[0164] If the second bolt hole is a non-through hole, firstly, a second bolt 303 is matched with a corresponding second bolt hole to fix the vertical portion of one L-shaped composite material angle piece 301 to one side of the fixed spindle sleeve 201. Then, another second bolt 303 is matched with a corresponding second bolt hole to fix the vertical portion of another L-shaped composite material angle piece 301 to the other side of the fixed spindle sleeve 201.

[0165] The main structure 13 is connected to the fixed spindle sleeve 201 by the above connection method, thereby obtaining a complete brake caliper hanger 200 .

[0166] In the embodiment of the present invention, by determining the equivalent flat plate model and dimensional parameters of the main structure of the brake caliper hanger, and performing layer laying according to the above-mentioned equivalent flat plate model and dimensional parameters, the flat plate structure of the above-mentioned main structure can be obtained. By subjecting the flat plate structure to a hot press bending treatment, the curved shape of the main structure can be finalized. By performing the layer laying operation according to the preset laying rules, a fixed main shaft sleeve can be obtained. By performing wire breaking processing at the joints or intersections of the composite material layers, overlaps or gaps between the composite material layers are avoided, and the uniformity and strength of the main structure can be ensured. The laying trajectory accuracy of the high-precision automatic wire laying machine is extremely important, and it is necessary to strictly follow the design drawings (i.e. Figure 7 and Fig.10 The brake caliper hanger is operated by machining and shaping the main structure and the fixed spindle sleeve respectively, and then fixedly connected by high-performance adhesives and bolts, so as to realize the automated production and manufacturing of the brake caliper hanger. The brake caliper hanger processed by the present invention can replace the traditional metal brake caliper hanger, and can meet higher mechanical performance requirements. In addition, the brake caliper hanger of the present invention is suitable for complex working conditions such as low temperature, high temperature and corrosion faced by rail transit vehicles during operation. At the same time, the brake caliper hanger has undergone fatigue tests such as fatigue test, vibration impact test, low temperature test and salt spray test, which enhances the stability of the brake caliper hanger.

[0167] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A brake caliper hanger processing device, characterized in that: include: Hot bending dies, pressurized tooling structures, wire laying machines, and brake caliper hangers; The brake caliper hanger is made of thermoplastic fiber reinforced composite material; The pressurizing tool structure comprises: a first bending tool, a pressing tool, and a second bending tool; The first bending tool is rotatably connected to one end of the pressing tool via a first rotating shaft; the second bending tool is rotatably connected to the other end of the pressing tool via a second rotating shaft; The brake caliper hanger comprises: a fixed spindle sleeve and a main structure consisting of an upper plate, a lower plate and a connecting handle arranged between the upper plate and the lower plate; When processing the brake caliper hanger, the inner side of the connecting handle is placed flat on the hot bending die, the upper plate and the lower plate are respectively clamped on the side of the hot bending die, the pressing tool is attached to the outer side of the connecting handle, and the first bending tool and the second bending tool are pressed down to attach to the surface of the lower plate and the upper plate respectively; The wire laying machine is used to sequentially lay up the lower plate, the connecting handle and the upper plate to form the main structure, and to form the fixed main shaft sleeve by laying up the plates.

2. The device according to claim 1, characterized in that A first axial hole and a second axial hole are arranged on the upper plate; a third axial hole and a fourth axial hole are arranged on the lower plate; the first axial hole and the third axial hole are arranged in the same vertical direction, and the second axial hole and the fourth axial hole are arranged in the same vertical direction.

3. The device according to claim 2, characterized in that Also includes: Two L-shaped composite material angle pieces, a first bolt and a second bolt; the upper plate is provided with at least two first bolt holes, and the fixed spindle sleeve is provided with at least one second bolt hole; the first bolt cooperates with the first bolt hole to fix the horizontal part of the L-shaped composite material angle piece to the upper plate; the second bolt cooperates with the second bolt hole to fix the vertical part of the L-shaped composite material angle piece to the fixed spindle sleeve.

4. A method for processing a brake caliper hanger, characterized in that: The brake caliper hanger processing device applied to any one of claims 1 to 3 comprises: Determine the equivalent plate structure model and size parameters of the main structure according to the geometric characteristics of the main structure; Laying layers according to the equivalent flat plate structure model and the size parameters to obtain the flat plate structure of the main structure; Performing hot pressing and bending treatment on the flat plate structure; Performing a laying operation according to a preset laying rule to obtain the fixed main shaft sleeve; The brake caliper hanger is obtained by connecting the main structure and the fixed spindle sleeve through a plurality of composite material angle pieces and a plurality of bolts.

5. The method according to claim 4, characterized in that The step of performing ply laying according to the equivalent flat plate structure model and the size parameters to obtain the flat plate structure of the main structure comprises: Performing laser processing on the pre-selected composite material according to a preset temperature to melt the composite material; Laying the melted composite material in a pre-set laying direction; The laminated composite material is pressurized and shaped by a pressure roller to obtain the flat plate structure.

6. The method according to claim 5, characterized in that The plying is performed according to the equivalent flat plate structure model and the size parameters to obtain the flat plate structure of the main structure, and further includes: During the laying process, when the composite material is laid to the edge of the equivalent flat plate structure model, the edge of the composite material is cut.

7. The method according to claim 4, characterized in that The step of subjecting the flat plate structure to hot pressing and bending includes: Placing the flat plate structure in a processing chamber for heating to obtain a softened flat plate structure; The softened flat plate structure is pressurized and shaped by the hot bending die and the pressing tool to obtain a curved structure of the flat plate structure; The curved structure is pressed in sequence by the first bending tool and the second bending tool according to a preset shaping sequence to obtain the main structure.

8. The method according to claim 4, characterized in that The layer laying operation is performed according to a preset laying rule to obtain the fixed main shaft sleeve, including: The circular laying is performed according to the first wire laying trajectory, and the wire breaking process is performed at the junction of the beginning and the end of each circle of laying, until the circular diameter reaches the preset circular diameter; Perform U-shaped laying according to the second wire laying trajectory until the diameter of the semicircle of the U-shaped structure reaches a preset diameter; Parallel straight-line laying is performed according to the third wire laying trajectory to obtain the fixed main shaft sleeve.

9. The method according to claim 4, characterized in that After the flat plate structure is subjected to a hot press bending process, the method further comprises: According to the preset shaft hole size and shaft hole position, the main structure is cut to obtain the first shaft hole, the second shaft hole, the third shaft hole and the fourth shaft hole.

10. The method according to claim 4, characterized in that Before connecting the main structure and the fixed main shaft sleeve by a plurality of composite material angle pieces and a plurality of bolts, the method further comprises: According to the preset bolt hole size and bolt hole position, the main structure and the fixed spindle sleeve are cut to obtain a plurality of bolt holes.

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