Engine special-shaped cylinder bore machining device, method and machining system

Abstract

The present application relates to the field of engine technology, and specifically, provides an engine special-shaped cylinder bore processing device, method and processing system. The device includes a honing head, a first radial motor, a second radial motor, a first axial motor and a second axial motor, wherein the honing head includes a honing head body, a mandrel located at the center of the honing head body, a honing tool seat and a honing strip, the honing strip is installed on the first side of the honing tool seat, the second side of the honing tool seat is in contact with the mandrel, and the contact area between the mandrel and the honing tool seat is an elliptical cone structure; the first radial motor and the first axial motor drive the radial movement and axial movement of the honing head body respectively, and the second radial motor and the second axial motor drive the radial movement and axial movement of the mandrel respectively. This solution solves the problem that the current honing head that compensates for the shape of the cylinder bore is only suitable for ordinary cylindrical cylinder bores.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a device for machining a special-shaped cylinder hole of an engine, a method for machining a special-shaped cylinder hole, and a machining system. Background Art

[0002] As the explosion pressure of the engine increases, the deformation of the engine cylinder bore increases during operation, causing the wear of the piston and the cylinder bore to accelerate, which in turn causes problems such as engine friction and increased piston knocking noise. By accurately calculating the deformation of the engine cylinder bore and compensating the cylinder bore according to the calculation results, the cylinder bore shape with compensation for the cylinder bore deformation is obtained, which can reduce the deformation of the cylinder bore during engine operation, reduce friction, and increase the life of the piston.

[0003] The compensated cylinder bore is usually a non-cylindrical cylinder bore, with different diameters in the axial direction of the cylinder bore and different diameters in the radial direction of the cylinder bore. Currently, the shape of the compensated cylinder bore is mainly guaranteed by the honing process, and only ordinary cylindrical cylinder bores can be processed. For non-cylindrical cylinder bores, new honing processes need to be developed. Summary of the invention

[0004] The main purpose of the present application is to provide an engine special-shaped cylinder bore processing device, a method for processing special-shaped cylinder bores and a processing system, so as to at least solve the problem that the current honing head for compensating the cylinder bore shape is only suitable for ordinary cylindrical cylinder bores.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, there is provided an engine special-shaped cylinder bore processing device, comprising: a honing head, comprising a honing head body, a mandrel located at the center of the honing head body, a honing tool seat and a honing strip, wherein the honing strip is installed on a first side of the honing tool seat, and the second side of the honing tool seat is arranged in contact with the mandrel, and the contact area between the mandrel and the honing tool seat is an elliptical cone structure; a first radial motor, a second radial motor, a first axial motor and a second axial motor; wherein the first radial motor and the first axial motor respectively drive the radial movement and axial movement of the honing head body, and the second radial motor and the second axial motor respectively drive the radial movement and axial movement of the mandrel.

[0006] Optionally, the engine special-shaped cylinder bore machining device further comprises a pressure displacement sensor, and the pressure displacement sensor is installed between the honing tool seat and the side wall of the mandrel.

[0007] Optionally, a plurality of the honing tool seats are symmetrically arranged, and a plurality of the honing bars are symmetrically arranged.

[0008] According to another aspect of the present application, a method for machining a special-shaped cylinder hole by a special-shaped cylinder hole machining device for an engine is provided, comprising: obtaining axial parameters and radial parameters of the special-shaped cylinder hole to be machined; determining the radial motion trajectory and axial motion trajectory of a honing head body, and the radial motion trajectory and axial motion trajectory of a core shaft according to the axial parameters and radial parameters of the special-shaped cylinder hole to be machined; controlling a first radial motor to drive the honing head body to move radially based on the radial motion trajectory of the honing head body, controlling a first axial motor to drive the honing head body to move axially based on the axial motion trajectory of the honing head body, controlling a second radial motor to drive the core shaft to move radially based on the radial motion trajectory of the core shaft, and controlling a second axial motor to drive the core shaft to move axially based on the axial motion trajectory of the core shaft, so as to machine the special-shaped cylinder hole.

[0009] Optionally, the radial motion trajectory and axial motion trajectory of the honing head body, and the radial motion trajectory and axial motion trajectory of the core shaft are determined according to the axial parameters and the radial parameters of the special-shaped cylinder hole to be processed, including: importing the axial parameters and the radial parameters of the special-shaped cylinder hole to be processed into a CNC program template to obtain an updated CNC program; and determining the radial motion trajectory and axial motion trajectory of the honing head body, and the radial motion trajectory and axial motion trajectory of the core shaft based on the updated CNC program.

[0010] Optionally, after determining the radial motion trajectory and axial motion trajectory of the honing head body and the radial motion trajectory and axial motion trajectory of the core shaft and before executing the motor drive, the method further includes: formatting the updated CNC program to obtain a program code that can be used to control the motor.

[0011] Optionally, the engine special-shaped cylinder hole processing device also includes a pressure displacement sensor, which is installed between the honing tool seat and the side wall of the core shaft, wherein the method also includes: acquiring honing pressure data and tool seat displacement data detected by the pressure displacement sensor; and adjusting the honing parameters in real time according to the honing pressure data and the tool seat displacement data, and the honing parameters include: honing pressure and honing time.

[0012] Optionally, during the processing of the special-shaped cylinder bore, the method further includes: generating a honing stick replacement instruction according to processing requirements, wherein the honing stick replacement instruction indicates replacing a honing stick of a target particle size and a target concentration, wherein the processing requirements include a mesh shape.

[0013] According to another aspect of the present application, there is provided an engine special-shaped cylinder bore machining system, comprising: the engine special-shaped cylinder bore machining device; a data device, communicating with the engine special-shaped cylinder bore machining device, for executing a method for machining a special-shaped cylinder bore by the engine special-shaped cylinder bore machining device.

[0014] Optionally, the data device has a data input interface and a data output interface, the numerical control program is input from the data input interface, and the data output interface outputs the data processing result.

[0015] According to the technical solution of the present application, the engine special-shaped cylinder bore processing device includes a honing head, including a honing head body, a mandrel located at the center of the honing head body, a honing tool seat and a honing strip, wherein the honing strip is installed on the first side of the honing tool seat, the second side of the honing tool seat is contacted with the mandrel, and the contact area between the mandrel and the honing tool seat is an elliptical conical structure; a first radial motor, a second radial motor, a first axial motor and a second axial motor; wherein the first radial motor and the first axial motor drive the honing head body to move radially and axially respectively, and the second radial motor and the second axial motor drive the mandrel to move radially and axially respectively. In this solution, the honing head body and the mandrel are driven to move axially and radially by four motors, and the contact area between the mandrel and the honing tool seat is an elliptical conical structure, so that a shape with an elliptical cross section can be honed to compensate for the wear of the circular cylinder bore, thereby solving the problem that the honing head for compensating the shape of the cylinder bore is currently only suitable for ordinary cylindrical cylinder bores. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A schematic diagram of a special-shaped cylinder bore machining device for an engine provided in an embodiment of the present application is shown;

[0018] Figure 2 A schematic cross-sectional view of a honing head of a device for machining a special-shaped cylinder bore of an engine provided in accordance with an embodiment of the present application is shown;

[0019] Figure 3 The figure shows the contact area between the mandrel of the honing head and the honing tool holder of the engine special-shaped cylinder bore machining device provided in the embodiment of the present application;

[0020] Figure 4 An overall diagram of a non-cylindrical cylinder hole schematic diagram of an engine special-shaped cylinder hole machining device provided according to an embodiment of the present application is shown;

[0021] Figure 5 A top view of a schematic diagram of a non-cylindrical cylinder hole of an engine special-shaped cylinder hole machining device provided according to an embodiment of the present application is shown;

[0022] Figure 6A front view of a schematic diagram of a non-cylindrical cylinder hole of an engine special-shaped cylinder hole machining device provided according to an embodiment of the present application is shown;

[0023] Figure 7 A schematic diagram of the working principle of a system for machining special-shaped cylinder holes of an engine provided according to an embodiment of the present application is shown.

[0024] The above drawings include the following reference numerals:

[0025] 01. Engine special-shaped cylinder bore processing device; 10. Honing head; 11. Honing head body; 12. Mandrel; 13. Honing tool holder; 130. Contact area between mandrel and honing tool holder; 14. Honing stick; 20. First radial motor; 30. Second radial motor; 40. First axial motor; 50. Second axial motor. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] As introduced in the background technology, in the prior art, the compensation of the cylinder hole shape is mainly ensured by the honing process, and only ordinary cylindrical cylinder holes can be processed. For non-cylindrical cylinder holes, it is necessary to develop a new honing process. In order to solve the problem that the current honing head for compensating the cylinder hole shape is only suitable for ordinary cylindrical cylinder holes, the embodiments of the present application provide an engine special-shaped cylinder hole processing device, processing method and processing system.

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] The schematic diagram of the engine special-shaped cylinder hole processing device provided in the embodiment of the present application is as follows Figure 1 As shown, the engine special-shaped cylinder bore processing device 01 includes: a honing head 10, including a honing head body 11, a mandrel 12 located at the center of the honing head body, a honing tool seat 13 and a honing bar 14, wherein the honing bar 14 is installed on a first side of the honing tool seat 13, and the second side of the honing tool seat 13 is arranged in contact with the mandrel 12, and the contact area between the mandrel 12 and the honing tool seat 13 is an elliptical cone structure; a first radial motor 20, a second radial motor 30, a first axial motor 40 and a second axial motor 50; wherein the first radial motor 20 and the first axial motor 40 respectively drive the honing head body 11 to move radially and axially, and the second radial motor 30 and the second axial motor 50 respectively drive the mandrel 12 to move radially and axially.

[0032] Specifically, the cross-sectional schematic diagram of the honing head of the engine special-shaped cylinder bore processing device is as follows: Figure 2 As shown in the figure, the honing head consists of the following parts:

[0033] Honing head body 11: The main part of the honing head is usually made of metal material, and its shape design can adapt to different types of honing requirements.

[0034] Mandrel 12: The shaft located in the center of the honing head body. The area where it contacts the honing tool holder is designed as an elliptical cone structure. This design is to form a non-cylindrical profile corresponding to the deformation characteristics of the cylinder bore during the honing process.

[0035] Honing tool holder 13: A component used to install the honing bar. The honing bar is installed on one side of it, and the other side is in contact with the mandrel. The cylinder hole is processed through the relative movement of the honing bar and the mandrel.

[0036] Honing stick 14: A component that directly contacts the cylinder bore surface for honing. It is composed of a binder and abrasives. The size and distribution of the abrasives determine the honing accuracy and surface quality.

[0037] like Figure 3As shown, the area 130 where the core shaft of the honing head contacts the honing tool holder is shown. The area where the core shaft contacts the honing tool holder 13 is an elliptical conical structure, which can generate an elliptical motion trajectory in the radial direction by rotation, and a conical motion trajectory in the axial direction by reciprocating motion.

[0038] The first radial motor and the first axial motor are used to control the movement of the honing head body:

[0039] The first radial motor is responsible for driving the feed movement of the honing head body in the radial direction, that is, controlling the lateral movement of the honing head body relative to the central axis of the cylinder hole to meet the processing requirements of different radial positions. When processing non-cylindrical cylinder holes, such as elliptical conical cylinder holes, the first radial motor should be able to control the radial feed amount of the honing head body at different angles according to program instructions, so as to form different diameters at different radial positions.

[0040] The first axial motor is responsible for driving the feed movement of the honing head body in the axial direction, that is, controlling the movement of the honing head body along the length direction of the cylinder bore. When machining non-cylindrical cylinder bores, such as cylinder bores with tapers, the first axial motor must be able to adjust its radial feed during the axial movement of the honing head body according to program instructions to form different diameters at different depths of the cylinder bore.

[0041] The second radial motor and the second axial motor are used to control the movement of the mandrel:

[0042] Second radial motor: responsible for driving the fine-tuning movement of the mandrel in the radial direction. The mandrel is usually used to support and position the workpiece to be processed, such as a cylinder block. During the honing process, the radial fine-tuning of the mandrel can ensure the correct relative position between the workpiece to be processed and the honing head, thereby ensuring the processing accuracy.

[0043] The second axial motor is responsible for driving the fine-tuning movement of the mandrel in the axial direction. Similarly, the axial fine-tuning of the mandrel is also to ensure the relative position between the workpiece to be processed and the honing head, and to ensure that during the honing process, the honing head can perform processing according to the preset trajectory and parameters. Especially when processing cylinder holes with complex shapes, the precise axial position adjustment of the mandrel is particularly important.

[0044] Through the precise coordinated control of these four motors, the new honing process system can achieve high-precision processing of cylinder bores with complex shapes, meeting the needs of engine cylinder bore compensation design, thereby reducing cylinder bore deformation during engine operation, reducing friction, and increasing piston life.

[0045] The device can independently control the radial and axial movement of the honing head and mandrel during the machining process, and can accurately adjust the position and pressure of the honing stick inside the cylinder bore to adapt to the deformation characteristics of the cylinder bore in different areas. For example, for non-cylindrical cylinder bores (elliptical + conical cylinder bores), the device can increase the pressure and feed of the honing stick in certain areas as needed, and reduce it in other areas, thereby forming the required non-cylindrical profile during the honing process, ultimately achieving the purpose of reducing wear, improving piston life and engine performance. The overall diagram of the non-cylindrical cylinder bore schematic is shown below. Figure 4 As shown in the figure, the overall diagram shows that the diameter of the cylinder hole gradually changes in the axial direction, and also presents a non-circular elliptical shape in the radial direction. The top view of the schematic diagram of the non-cylindrical cylinder hole is shown in Figure 5 As shown in the figure, the top view mainly shows the cross-sectional shape of the cylinder bore in the radial direction (i.e., perpendicular to the axis of the cylinder bore). For an elliptical + conical cylinder bore, the top view shows an ellipse, which indicates that the diameter of the cylinder bore in the radial direction is not uniform, but different in two directions. Figure 6 As shown, the front view mainly shows the shape change of the cylinder bore along its axial direction (i.e., the length direction). Unlike the top view that focuses on the radial cross-sectional shape, the front view reveals how the diameter of the cylinder bore changes from one end to the other. For an elliptical + conical non-cylindrical cylinder bore, the diameter of the cylinder bore shown in its front view gradually increases or decreases from one end to the other, indicating that the cylinder bore is not uniform in the axial direction, but presents a taper. Non-cylindrical cylinder bores, especially "elliptical + conical cylinder bores", are a special cylinder bore shape used in engine design to improve the fit between the piston and the cylinder wall. This cylinder bore has a varying diameter in two dimensions (axial and radial):

[0046] Diameter change in the axial direction (tapered feature): In the axial direction of the cylinder bore, the diameter of the cylinder bore is not constant from one end to the other, but gradually changes. Usually, this change is manifested as a gradual increase or decrease in diameter from top to bottom, forming a shape similar to a cone.

[0047] Diameter variation in radial direction (elliptical feature): On any radial section of the cylinder bore, the diameter of the cylinder bore is not equal in 360 degrees, but presents an elliptical shape. In one or some radial directions, the diameter of the cylinder bore will be larger or smaller than in other directions.

[0048] The above-mentioned engine special-shaped cylinder hole processing device also includes a pressure displacement sensor, and the above-mentioned pressure displacement sensor is installed between the above-mentioned honing tool seat and the side wall of the above-mentioned core shaft.

[0049] Specifically, the pressure displacement sensor is a precision sensor that can measure pressure and displacement changes at the same time. In the engine special-shaped cylinder bore processing device, it is installed between the honing tool holder and the side wall of the mandrel. Its function is to monitor the pressure changes of the honing stick during the processing and the displacement changes of the honing tool holder relative to the mandrel in real time. These data are crucial for controlling the honing process because they are directly related to the processing accuracy and surface quality.

[0050] By real-time monitoring of the pressure of the honing stick on the cylinder bore wall and the relative displacement between the honing tool holder and the mandrel, the pressure displacement sensor can provide dynamic information during the honing process. This information is then sent to the control system (e.g., a computer numerical control system CNC). The control system adjusts the operating parameters of the first radial motor, the first axial motor, the second radial motor, and the second axial motor according to the real-time data fed back by the sensor, such as adjusting the motor speed and feed speed, to ensure that the honing stick can apply correct and stable radial and axial pressure when processing cylinder bores of different shapes.

[0051] Using the data from the pressure-displacement sensor, the control system can dynamically adjust the radial and axial feed of the honing tool holder, as well as the radial and axial position of the mandrel, thereby achieving precise processing of the cylinder bore shape. For example, when the displacement or pressure in certain areas of the honing tool holder does not meet the preset processing parameters, the control system can instantly adjust the output of the motor to avoid processing errors or part damage caused by improper pressure or displacement.

[0052] The plurality of honing tool seats are symmetrically arranged, and the plurality of honing bars are symmetrically arranged.

[0053] Specifically, the honing tool holder is a component that directly carries the honing bar and performs precision machining with it. In the engine special-shaped cylinder bore machining device, multiple honing tool holders are designed to be symmetrically distributed. If the honing head body is circular, the honing tool holders will be evenly distributed on its circumference, or if the honing head body has a certain symmetrical shape, the honing tool holders will also be distributed along the symmetry axis of the shape. Such a design ensures that the weight of the honing head body is evenly distributed during the machining process, reduces vibration during machining, and improves machining stability.

[0054] Honing bars are tools that actually contact the cylinder bore surface for honing. Their shape and size directly affect the processing quality and efficiency. In the engine special-shaped cylinder bore processing device, multiple honing bars are also designed to be symmetrically arranged. The honing bars installed on each honing tool holder are matched in shape, size and abrasive distribution to ensure that during the processing, the forces exerted by all honing bars on the cylinder bore wall are evenly distributed to avoid processing deformation or damage caused by excessive local pressure, while ensuring the symmetry and uniformity of the cylinder bore shape.

[0055] By symmetrically setting the honing tool holder and the honing stick, the processing device can distribute the force during the processing more evenly, reduce the processing error caused by asymmetrical force distribution, and improve the processing accuracy. In addition, the symmetrical setting also helps to reduce vibration and noise during the processing, prolong the service life of the equipment, and is also conducive to forming a uniform honing pattern and ensuring the micro-geometric characteristics of the cylinder bore surface, which is particularly important for the processing of non-cylindrical cylinder bores, because they have different diameters and shape requirements in different areas.

[0056] The engine special-shaped cylinder bore processing device of the present application can realize the processing of cylinder bores of elliptical cone, elliptical saddle, elliptical waist drum, elliptical bottle mouth, etc. This embodiment also provides a method for processing special-shaped cylinder bores using the above-mentioned engine special-shaped cylinder bore processing device, including: obtaining the axial parameters and radial parameters of the special-shaped cylinder bore to be processed; determining the radial motion trajectory and axial motion trajectory of the honing head body, and the radial motion trajectory and axial motion trajectory of the core shaft according to the above-mentioned axial parameters and the above-mentioned radial parameters of the special-shaped cylinder bore to be processed; based on the above-mentioned radial motion trajectory of the honing head body, controlling the first radial motor to drive the above-mentioned honing head body to move radially, based on the above-mentioned axial motion trajectory of the honing head body, controlling the first axial motor to drive the above-mentioned honing head body to move axially, based on the above-mentioned axial motion trajectory of the honing head body, controlling the second radial motor to drive the above-mentioned core shaft to move radially, and based on the above-mentioned axial motion trajectory of the core shaft, controlling the second axial motor to drive the above-mentioned core shaft to move axially, so as to process the special-shaped cylinder bore.

[0057] Specifically, first, it is necessary to obtain the specific axial parameters and radial parameters of the special-shaped cylinder hole to be processed. The axial parameters usually involve the length of the cylinder hole, the diameter change law in the axial direction (such as taper), etc. The radial parameters include the diameter and shape (such as ovality) of the cylinder hole in the cross section, and any specific radial deformation requirements. These parameters can be obtained by measuring the existing design drawings, or by analyzing the thermal deformation and wear characteristics of the engine under actual working conditions, providing an accurate data basis for subsequent processing planning.

[0058] Based on the acquired axial and radial parameters, the next step is to determine the motion trajectory of the honing head body and the mandrel, which includes the radial motion trajectory (i.e., the change in the radial position of the honing bar relative to the center of the cylinder bore) and the axial motion trajectory (i.e., the movement path of the honing bar along the axis of the cylinder bore). The determination of the motion trajectory is based on the shape characteristics of the cylinder bore to be processed and the preset processing strategy. For the elliptical + tapered cylinder bore, the radial feed of the honing head reaches the maximum at 90° and 180°, that is, the radial motion trajectory of the honing head body needs to reach the maximum at 90° and 180°, and the radial feed gradually becomes the minimum at 0° and 270°. At the same time, the axial motion trajectory should gradually increase the radial maximum and minimum values ​​from the top to the bottom of the cylinder bore.

[0059] Finally, according to the planned motion trajectory, the radial and axial motion of the honing head body is driven by controlling the first radial motor and the first axial motor, and the radial and axial motion of the mandrel is driven by controlling the second radial motor and the second axial motor. The motor control is achieved through a computer numerical control system (CNC). The CNC system will dynamically adjust the operating parameters of the motor according to the preset programming instructions and the real-time feedback data obtained from the pressure displacement sensor to ensure that the motion trajectory of the honing head body and the mandrel is precisely in line with the plan.

[0060] This processing method makes full use of the independent driving capabilities of the honing head body and the mandrel in the processing device, as well as the real-time monitoring feedback provided by the pressure displacement sensor, to achieve precise control of the shape of the special-shaped cylinder bore. Through precise planning and control, the processing device can process cylinder bores with complex shapes, such as elliptical + tapered cylinder bores, according to preset axial and radial parameters, thereby effectively reducing the deformation of the cylinder bore during engine operation, reducing friction and noise, and improving the service life of the piston and the overall performance of the engine. In addition, the flexibility of this method is also reflected in the ability to dynamically adjust the motion trajectory and motor control strategy according to different special-shaped cylinder bore design requirements, so that the same device can process cylinder bores of various shapes, improving the diversity and efficiency of processing.

[0061] According to the above-mentioned axial parameters and radial parameters of the above-mentioned special-shaped cylinder hole to be processed, the radial motion trajectory and axial motion trajectory of the honing head body, and the radial motion trajectory and axial motion trajectory of the core shaft are determined, including: importing the above-mentioned axial parameters and radial parameters of the above-mentioned special-shaped cylinder hole to be processed into a CNC program template to obtain an updated CNC program; based on the above-mentioned updated CNC program, the radial motion trajectory and axial motion trajectory of the honing head body, and the radial motion trajectory and axial motion trajectory of the core shaft are determined.

[0062] Specifically, first, the axial parameters and radial parameters of the special-shaped cylinder bore to be processed are imported into a special CNC program template. These parameters may include specific values ​​such as the diameter and shape (such as ovality and taper) of the cylinder bore at different axial positions. The CNC program is a set of instructions that control the action of the processing device. The template provides a basic program framework, and the imported specific parameters are used to customize this framework to adapt it to the processing requirements of a specific cylinder bore. The use of program templates simplifies the process of converting complex parameters into specific processing instructions, allowing operators to generate corresponding CNC programs more quickly and accurately according to different cylinder bore shape requirements. This program update process is usually completed in a computer numerical control system (CNC). The CNC system can parse these parameters and convert them into control instructions for the motor to ensure that the processing device can hone according to the required trajectory.

[0063] Once the CNC program is updated, the next step is to determine the motion trajectory of the honing head body and the mandrel based on this updated program. The CNC system converts the information in the program into specific motor control signals, which guide the operation of the first radial motor, the first axial motor, the second radial motor, and the second axial motor. Specifically, the CNC system calculates the radial and axial motion trajectories of the honing head body and the mandrel during the machining process based on the parameters in the program, ensuring that the honing stick can machine the cylinder bore according to the predetermined shape requirements.

[0064] Through the customization and updating of the NC program, the precise planning and control of the machining motion trajectory can be achieved, thus ensuring that the machining device can accurately machine special-shaped cylinder holes with specific axial and radial parameters. For example, for an elliptical + tapered cylinder hole, the updated NC program will guide the honing head body to reach the maximum radial feed in the 90° and 180° directions, while gradually decreasing in the 0° and 270° directions; at the same time, from the top to the bottom of the cylinder hole, the radial minimum and maximum values ​​will gradually increase to form the desired special-shaped contour.

[0065] After determining the radial and axial motion trajectories of the honing head body and the core shaft and before executing the motor drive, the method further includes: formatting the updated CNC program to obtain a program code that can be used to control the motor.

[0066] Specifically, the updated NC program generated in the CNC system contains all the necessary information for machining a specific special-shaped cylinder hole, such as axial parameters, radial parameters and corresponding motion trajectories. However, this information is usually in a high-level programming language or a specific NC instruction format, which is not suitable for direct motor control. Therefore, it is necessary to convert this program into a format that can be understood and executed by a programmable logic controller (PLC), that is, program code. This conversion process may involve syntax adjustment, instruction conversion and data format adaptation to ensure that the final program code can be accurately parsed and executed by the motor control system. The program code after format conversion can directly guide the operation of the motor, including the first radial motor, the first axial motor, the second radial motor and the second axial motor. These codes contain all necessary control instructions such as start, stop, speed, direction and feed amount of the motor during the machining process. By converting the updated NC program into motor control code, it can be ensured that the machining device can accurately execute the preset motion trajectory and perform precision machining on the special-shaped cylinder hole.

[0067] This format conversion step serves as a bridge from advanced CNC programming to specific motor control instructions. Advanced CNC programs contain processing logic and parameters, but the motor control system requires more direct and specific control instructions. The format conversion ensures that the processing logic and parameters can be correctly understood and executed by the motor control system. Through this process, the processing device can accurately control the radial and axial movement of the honing head body and the core shaft according to the motion trajectory planned in the update program, thereby achieving high-precision processing of special-shaped cylinder holes, meeting the special requirements of engine cylinder hole design, and improving engine performance and reliability.

[0068] The above-mentioned engine special-shaped cylinder hole processing device also includes a pressure displacement sensor, which is installed between the above-mentioned honing tool seat and the side wall of the above-mentioned core shaft, wherein the above-mentioned method also includes: obtaining the honing pressure data and the tool seat displacement data detected by the above-mentioned pressure displacement sensor; and adjusting the honing parameters in real time according to the above-mentioned honing pressure data and the above-mentioned tool seat displacement data, and the above-mentioned honing parameters include: honing pressure and honing time.

[0069] Specifically, the pressure displacement sensor is installed between the honing tool holder and the side wall of the mandrel. Its main function is to monitor the honing pressure of the honing tool holder on the cylinder bore wall and the displacement change of the honing tool holder relative to the mandrel in real time. These data are crucial to the control of the machining process because they directly affect the contact state between the honing tool holder and the cylinder bore wall, thereby affecting the machining quality and efficiency. During the machining process, the pressure displacement sensor will continuously collect the honing pressure data applied by the honing tool holder to the cylinder bore wall and the displacement data of the honing tool holder relative to the mandrel. These data are fed back to the control system of the machining device, such as the CNC (computer numerical control) system, in real time through signal transmission, providing a basis for subsequent dynamic adjustments. After receiving the pressure and displacement data fed back by the sensor, the control system will perform real-time analysis and processing, and dynamically adjust the honing pressure and honing time according to the current machining state and preset machining parameters. For example, if the sensor detects that the honing pressure in certain areas is lower than expected, the control system will adjust the first radial motor and the first axial motor to increase the pressure of the honing stick on the cylinder bore wall or extend the honing time in this area to ensure the processing quality. Conversely, if the pressure is too high, the control system will reduce the pressure accordingly to avoid excessive wear on the cylinder bore wall or improper processing.

[0070] Through real-time data feedback and parameter adjustment, the processing device can respond immediately to various changes in the honing process, which greatly improves the flexibility and accuracy of processing. When processing special-shaped cylinder holes, due to the complexity and irregularity of the cylinder hole shape, real-time adjustment of the honing parameters can ensure that the appropriate honing pressure and time are applied under different areas and different shape requirements, thereby avoiding processing errors and improving processing quality. At the same time, this dynamic adjustment mechanism also helps to protect the processing device and avoid equipment damage caused by excessive pressure or improper operation.

[0071] During the process of machining the special-shaped cylinder hole, the method further includes: generating a honing bar replacement instruction according to machining requirements, wherein the honing bar replacement instruction indicates replacing the honing bar with the target particle size and target concentration, wherein the machining requirements include the mesh shape.

[0072] Specifically, when processing special-shaped cylinder holes, in addition to meeting the basic shape and size requirements, the shape of the mesh is also an important parameter in the processing requirements. The mesh refers to the microscopic cross-helical texture formed on the surface of the cylinder hole. They play an important role in improving the lubrication performance of the cylinder hole, reducing friction and wear, and extending the life of the engine. Different mesh shapes and characteristics can adapt to different working environments and performance requirements, such as improving lubrication effects and heat dissipation performance.

[0073] The grain size and concentration of the honing bar directly affect the formation of the reticulation. The grain size refers to the size of the abrasive (such as diamond, silicon carbide, etc.), which determines the ability of the honing bar to remove materials and the roughness of the honing surface. The concentration reflects the distribution density of the abrasive in the honing bar. A high concentration will increase the hardness and wear resistance of the honing bar, but may reduce its self-sharpening (i.e., the ability to automatically maintain sharpness). Therefore, by replacing the honing bar with different grain sizes and concentrations, the formation of the reticulation can be controlled to meet different requirements for material removal, surface roughness, and micro-geometric characteristics.

[0074] During the processing, the control system (such as CNC system) will dynamically analyze the current processing effect and the use status of the honing stick according to the preset mesh shape requirements. When it is detected that the particle size and concentration of the current honing stick are no longer suitable for generating the required mesh shape, the system will generate a honing stick replacement instruction. This instruction includes specific information on replacing the honing stick with the target particle size and target concentration. The operator or the automation system replaces the corresponding honing stick according to the instruction to continue processing and form the correct mesh.

[0075] The ability to dynamically change honing bars makes the process more flexible and efficient. When machining complex shaped cylinder bores, different areas may require different texture shapes, or during the machining process, as the honing bar wears, its particle size and concentration characteristics will gradually change and no longer be suitable for continued use. By instantly generating replacement instructions and replacing the appropriate honing bar, the processing device can ensure that a uniform, high-quality texture is formed on the cylinder bore surface to meet the strict requirements of the engine cylinder bore in terms of wear resistance, lubricity and sealing, thereby improving the overall performance and reliability of the engine.

[0076] An embodiment of the present application also provides an engine special-shaped cylinder hole processing system, comprising: the above-mentioned engine special-shaped cylinder hole processing device; a data device, communicating with the above-mentioned engine special-shaped cylinder hole processing device, and used to execute the method of processing the special-shaped cylinder hole by the above-mentioned engine special-shaped cylinder hole processing device.

[0077] The working principle diagram of the engine special-shaped cylinder hole processing device is as follows Figure 7 As shown, the operator programs according to the cylinder hole shape information, and inputs the CNC program into the computer numerical control system (CNC system) through the input device. The computer control system converts the CNC program into PLC executable code and inputs it into the PLC. The PLC controls the spindle motor, controls the rotation of the spindle motor, and controls the servo motor through the feed control unit, thereby controlling the axial feed and movement of the spindle and the radial feed of the honing head. The machine tool body is equipped with a negative feedback system, which feeds back the actually measured spindle position (angle, depth) and honing pressure detection to the CNC system for trimming.

[0078] Specifically, the data device is the intelligent control part of the system, which communicates with the processing device to execute the method of processing special-shaped cylinder holes. The data device usually includes a computer numerical control system (CNC) or other types of numerical control devices, and a possible sensor data processing module. Its main functions include: receiving and parsing the axial and radial parameters of the cylinder hole to be processed, and generating or updating the numerical control program. According to the real-time data feedback from the sensor, dynamically adjust the processing parameters, such as honing pressure and time, to optimize the processing process. Generate and execute honing bar replacement instructions to meet processing requirements, such as forming a specific mesh shape. Control the action of the motor to ensure that the honing head body and the mandrel are processed according to the planned motion trajectory.

[0079] In actual operation, the data device first generates or updates the CNC program according to the cylinder bore design parameters, and then converts this program into control code that can be directly executed by the motor to guide the processing device to perform precise processing. During the processing, the data device continuously receives real-time data from the pressure displacement sensor, analyzes this data to monitor the processing status, and adjusts the processing parameters and honing sticks as needed to ensure that the processing results meet the design requirements.

[0080] The above engine special-shaped cylinder bore processing system, through the close combination of intelligent data devices and customized processing devices, can achieve high-precision and high-efficiency processing of special-shaped cylinder bores, and has good adaptability and flexibility. The system can not only process complex non-cylindrical cylinder bores, such as elliptical + tapered cylinder bores, but also form the required surface texture by adjusting the processing parameters and tools in real time, thereby improving the wear resistance, lubricity and sealing of the cylinder bore, which is of great significance to improving the performance and life of the engine.

[0081] The data device has a data input interface and a data output interface. The numerical control program is input from the data input interface, and the data output interface outputs the data processing result.

[0082] Specifically, the data input interface is the entrance for the data device to receive external data. Its main function is to import the parameter information and processing instructions of the special-shaped cylinder hole to be processed into the system. These parameter information include the axial parameters, radial parameters and other specific processing requirements of the cylinder hole (such as mesh shape, honing stick particle size and concentration, etc.). Through the data input interface, the operator can input the design drawings, engineering calculation results or preset processing programs into the data device to provide the system with the basic basis for processing operations. In addition, the data input interface may also be used to receive update instructions from the control system or real-time data obtained from sensors to achieve dynamic adjustment and optimization of the processing process.

[0083] The data output interface is the outlet for the data device to output data to external devices or systems. Its main function is to provide status information of the processing process and data feedback of the processing results. During the processing, the data output interface can output real-time processing parameters, motor operating status, sensor data, etc., which is convenient for external monitoring or analysis systems. More importantly, the data output interface will output the processing results after the processing is completed. This can be the evaluation data of the cylinder surface quality, the record of the processing process, the processing time, the information of the materials used, etc., which provides a basis for subsequent quality control, equipment maintenance or production management.

[0084] The data input interface and data output interface enable the data device to be seamlessly connected with the external system to form an open and interactive processing control environment. Through the data input interface, the system can flexibly receive diverse processing requirements and realize precision processing of special-shaped cylinder holes with different shapes and characteristics. Through the data output interface, the system can provide real-time feedback on the processing status, which is convenient for monitoring and adjustment. At the same time, it can provide detailed processing results after the processing is completed, supporting subsequent quality inspection and data traceability.

[0085] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0086] According to the technical solution of the present application, the engine special-shaped cylinder bore processing device includes a honing head, including a honing head body, a mandrel located at the center of the honing head body, a honing tool seat and a honing strip, wherein the honing strip is installed on the first side of the honing tool seat, the second side of the honing tool seat is contacted with the mandrel, and the contact area between the mandrel and the honing tool seat is an elliptical conical structure; a first radial motor, a second radial motor, a first axial motor and a second axial motor; wherein the first radial motor and the first axial motor drive the honing head body to move radially and axially respectively, and the second radial motor and the second axial motor drive the mandrel to move radially and axially respectively. In this solution, the honing head body and the mandrel are driven to move axially and radially by four motors, and the contact area between the mandrel and the honing tool seat is an elliptical conical structure, so that a shape with an elliptical cross section can be honed to compensate for the wear of the circular cylinder bore, thereby solving the problem that the honing head for compensating the shape of the cylinder bore is currently only suitable for ordinary cylindrical cylinder bores.

[0087] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An engine special-shaped cylinder bore machining device, characterized in that: include: A honing head, comprising a honing head body, a mandrel located at the center of the honing head body, a honing tool seat and a honing bar, wherein the honing tool seat is mounted on a first side of the honing tool seat, a second side of the honing tool seat is arranged in contact with the mandrel, and a contact area between the mandrel and the honing tool seat is an elliptical cone structure, wherein the design of the elliptical cone structure forms a non-cylindrical profile corresponding to the deformation characteristics of the cylinder bore during the honing process; a first radial motor, a second radial motor, a first axial motor, and a second axial motor; Among them, the first radial motor and the first axial motor drive the radial movement and axial movement of the honing head body respectively, the second radial motor and the second axial motor drive the radial movement and axial movement of the core shaft respectively, the first radial motor controls the radial feed amount of the honing head body at different angular positions, the first axial motor controls the movement of the honing head body along the length direction of the cylinder hole, the second radial motor drives the fine-tuning movement of the core shaft in the radial direction, and the second axial motor drives the fine-tuning movement of the core shaft in the axial direction.

2. The engine special-shaped cylinder bore machining device according to claim 1, characterized in that: The engine special-shaped cylinder bore machining device further comprises a pressure displacement sensor, which is installed between the honing tool seat and the side wall of the mandrel.

3. The engine special-shaped cylinder bore machining device according to claim 1, characterized in that: The plurality of honing tool seats are symmetrically arranged, and the plurality of honing bars are symmetrically arranged.

4. A method for machining a special-shaped cylinder hole using the engine special-shaped cylinder hole machining device according to any one of claims 1 to 3, characterized in that: include: Obtaining the axial parameters and radial parameters of the special-shaped cylinder hole to be processed; Determining the radial motion trajectory and axial motion trajectory of the honing head body and the radial motion trajectory and axial motion trajectory of the core shaft according to the axial parameters and radial parameters of the special-shaped cylinder hole to be processed; Based on the radial motion trajectory of the honing head body, the first radial motor is controlled to drive the honing head body to move radially; based on the axial motion trajectory of the honing head body, the first axial motor is controlled to drive the honing head body to move axially; based on the radial motion trajectory of the core shaft, the second radial motor is controlled to drive the core shaft to move radially; based on the axial motion trajectory of the core shaft, the second axial motor is controlled to drive the core shaft to move axially, so as to process a special-shaped cylinder hole.

5. The method according to claim 4, characterized in that According to the axial parameters and the radial parameters of the special-shaped cylinder hole to be processed, the radial motion trajectory and the axial motion trajectory of the honing head body and the radial motion trajectory and the axial motion trajectory of the core shaft are determined, including: Importing the axial parameters and the radial parameters of the special-shaped cylinder hole to be processed into a numerical control program template to obtain an updated numerical control program; The radial motion trajectory and the axial motion trajectory of the honing head body and the radial motion trajectory and the axial motion trajectory of the core shaft are determined based on the updated numerical control program.

6. The method according to claim 5, characterized in that After determining the radial motion trajectory and the axial motion trajectory of the honing head body and the radial motion trajectory and the axial motion trajectory of the core shaft and before executing the motor driving, the method further includes: The updated numerical control program is formatted to obtain a program code that can be used to control the motor.

7. The method according to claim 4, characterized in that The engine special-shaped cylinder bore machining device further comprises a pressure displacement sensor, wherein the pressure displacement sensor is installed between the honing tool holder and the side wall of the mandrel, wherein the method further comprises: Acquiring honing pressure data and tool seat displacement data detected by the pressure displacement sensor; The honing parameters are adjusted in real time according to the honing pressure data and the tool position displacement data, and the honing parameters include: honing pressure and honing time.

8. The method according to claim 4, characterized in that In the process of machining the special-shaped cylinder hole, the method further comprises: A honing bar replacement instruction is generated according to the processing requirements, wherein the honing bar replacement instruction instructs to replace the honing bar with the target particle size and the target concentration, wherein the processing requirements include the shape of the mesh.

9. An engine special-shaped cylinder bore processing system, characterized in that: include: The engine special-shaped cylinder bore machining device according to any one of claims 1 to 3; A data device communicates with the engine special-shaped cylinder hole processing device and is used to execute the method for processing a special-shaped cylinder hole by the engine special-shaped cylinder hole processing device according to any one of claims 4 to 8.

10. The engine special-shaped cylinder bore machining system according to claim 9, characterized in that: The data device has a data input interface and a data output interface, the numerical control program is input from the data input interface, and the data output interface outputs the data processing result.

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