Water cutter and air cutter combined machining system for sand mold with complex structure

Abstract

The invention relates to the technical field of complex structure sand mold material machining, in particular to a complex structure sand mold water jet cutter and air jet cutter combined machining system which comprises a water jet cutter cutting unit, an air jet cutter cleaning unit, a waste scrap collecting unit and an intelligent control system. The air knife cleaning unit is used for conducting high-speed air knife cleaning, the waste chip collecting unit is used for collecting and treating waste chips, the intelligent control system is used for cooperating work of all the units, and the system is particularly suitable for machining sand mold workpieces of complex structures and aims at improving the machining precision, reducing tool losses, optimizing the production environment and promoting resource recycling.

Description

Technical Field

[0001] The invention relates to the technical field of material processing, and in particular to a water knife and air knife composite processing system for sand molds with complex structures. Background Art

[0002] In the existing sand mold processing technology, there are many challenges in processing complex structure workpieces, such as high cutting difficulty, fast tool wear, low processing accuracy, and inconvenient waste chip disposal. These problems not only affect production efficiency and product quality, but also increase production costs and environmental pollution. Therefore, it is particularly important to develop an efficient, environmentally friendly, and low-loss sand mold processing system. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention proposes an innovative solution, which aims to solve the difficult problems in the processing of complex structure sand mold workpieces by integrating the efficient cutting capability of water jet cutting, the thorough cleaning effect of air knife cleaning and the environmentally friendly characteristics of waste chip collection and treatment.

[0004] To achieve the above-mentioned purpose, the present invention discloses a complex structure sand mold water jet and air knife composite processing system, including a water jet cutting unit, an air knife cleaning unit, a waste chip collection unit and an intelligent control system, wherein the water jet cutting unit is used for high-pressure water jet cutting, the air knife cleaning unit is used for high-speed air knife cleaning, the waste chip collection unit is used for waste chip collection and processing, and the intelligent control system is used to coordinate the work of each unit.

[0005] Furthermore, the water jet cutting unit includes a high-pressure water pump, a precision pressure regulating valve, a water flow control system, a water jet nozzle assembly, an automatic nozzle cleaning system and a cooling circulation system; the high-pressure water generated by the high-pressure water pump passes through the precision pressure regulating valve and the water flow control system, and after precise adjustment, it is ejected at an extremely high speed through the water jet nozzle assembly to achieve precise cutting; the automatic nozzle cleaning system is used to ensure that the water jet nozzle is unobstructed, and the cooling circulation system is used to maintain a stable water temperature during the cutting process.

[0006] Furthermore, the air knife cleaning unit consists of a high-pressure air source, an airflow control system, an air knife nozzle assembly and an airflow guide device; the high-speed airflow generated by the high-pressure air source is precisely adjusted by the airflow control system, and then forcefully ejected in a specific mode through the air knife nozzle assembly, fully covering the surface of the workpiece, and completely removing the tiny particles and water droplets remaining after cutting.

[0007] Furthermore, the waste chip collection unit integrates a dust hood, an air suction duct, a high-efficiency filter, a waste chip collection container, a waste chip compression and drying system, and a circulating water treatment system; the dust hood is arranged outside the water knife nozzle assembly and the air knife nozzle assembly, and realizes omnidirectional collection of waste chips together with the air suction duct, the high-efficiency filter separates waste chips and water mist, the waste chips are stored in the waste chip collection container after being processed by the compression and drying system, and the water mist is purified and reused by the circulating water treatment system.

[0008] Furthermore, the intelligent control system integrates the workbench positioning system, processing path planning software, machine vision system and automation control unit, and introduces artificial intelligence algorithm; it is used to monitor the workpiece position and processing status in real time, automatically optimize processing parameters and paths, ensure processing accuracy and efficiency, and at the same time, has fault warning and diagnosis functions to ensure stable operation of the system.

[0009] Furthermore, the application method of the system includes the following steps:

[0010] Step 1: Workpiece preparation and clamping: Place the sand mold workpiece to be processed on the workbench and fix it. The intelligent control system starts the workbench positioning system to ensure accurate alignment of the workpiece;

[0011] Step 2: Water jet cutting: Start the water jet cutting unit and perform precise cutting according to the preset processing path and parameters. During the cutting process, the automatic nozzle cleaning system works regularly to keep the water jet nozzle unobstructed;

[0012] Step 3: Air knife cleaning: After cutting is completed, the air knife cleaning unit is immediately started, and high-speed airflow is ejected through the air knife nozzle assembly to cover the surface of the workpiece and remove residual tiny particles and water droplets. After the cleaning process is completed, the system automatically shuts down the air knife cleaning unit;

[0013] Step 4: Waste collection and treatment: During the cutting and cleaning process, the waste collection unit continues to work; the dust hood and the suction duct combine with negative pressure technology to suck the mixture of waste and water mist into the high-efficiency filter for separation. The separated waste enters the compression and drying system for treatment and storage; the water mist enters the circulating water treatment system for purification and reuse in the cutting process or other purposes;

[0014] Step 5: Finished product inspection and subsequent processing: After processing is completed, the finished product is inspected for quality to ensure that it meets the requirements, and then subsequent processing such as polishing and painting is carried out as needed.

[0015] Beneficial effects of the present invention:

[0016] 1. Improve processing accuracy and surface quality: High-precision processing and thorough cleaning are achieved through the combined action of water jet cutting and air knife cleaning.

[0017] 2. Reduce tool loss and production costs: Reduce tool wear and replacement frequency to reduce production costs.

[0018] 3. Optimize the production environment: efficiently collect and process waste to reduce environmental pollution and optimize the production environment.

[0019] 4. Promote resource recycling: Recycling of waste reduces resource waste and promotes sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the system of the present invention;

[0021] Figure 2 The figure is a flowchart of the system of the present invention.

[0022] List of reference numerals:

[0023] 1- High-pressure water pump, 2- Cooling pump, 3- Radiator, 4- Automatic cleaning nozzle system, 5- Water flow control system, 6- Dust hood, 7- Temperature sensor, 8- Precision pressure regulating valve, 9- Water knife nozzle assembly, 10- Air knife nozzle assembly, 11- High-efficiency filter, 12- Air flow control system, 13- Air flow guide device, 14- Processing platform, 15- High-pressure air source, 16- Waste chip collection container. 17- Waste chip compression and drying system; DETAILED DESCRIPTION

[0024] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0025] like Figure 1-2 As shown, this embodiment provides a complex structure sand mold water jet and air knife composite processing system, which mainly includes: a water jet cutting unit, an air knife cleaning unit, a waste chip collection unit, and an intelligent control system. Among them, the water jet cutting unit is used for high-pressure water jet cutting, the air knife cleaning unit is used for high-speed air knife cleaning, the waste chip collection unit is used for waste chip collection and processing, and the intelligent control system is used to coordinate the work of each unit.

[0026] The water jet cutting unit is a highly precise and powerful component. It is mainly composed of a high-pressure water pump, a precision pressure regulating valve, a water flow control system, a water jet nozzle assembly, an automatic nozzle cleaning system, and a cooling circulation system.

[0027] As the power source of the entire unit, the high-pressure water pump can generate high-pressure water flow with strong pressure, which is then precisely adjusted by the precision pressure regulating valve and water flow control system. The precision pressure regulating valve, with its excellent precision, can make subtle adjustments to the pressure of the water flow to ensure that the water flow pressure is always in the most suitable state for cutting. The water flow control system is like a precise conductor, strictly controlling the flow rate, flow rate and other parameters of the water flow, so that the water flow can flow according to the established requirements. After such precise adjustment, the high-pressure water flow is ejected at a very high speed through the water jet nozzle assembly. The design of the water jet nozzle assembly is extremely sophisticated, which can focus the high-pressure water flow into an extremely small and powerful water flow beam, thereby achieving precise cutting of the workpiece.

[0028] The automatic nozzle cleaning system plays a vital role in the entire cutting process. During the cutting operation, various impurities, tiny particles in the surrounding environment, and debris generated by cutting sand molds are very likely to adhere to the nozzle. If they are not cleaned in time, the normal operation of the nozzle will be seriously affected. The automatic nozzle cleaning system can monitor the status of the water jet nozzle in real time. Once the water jet nozzle is found to have signs of blockage or accumulation of attachments, the cleaning procedure will be started immediately. The system usually uses a combination of high-pressure gas injection, water backwashing or mechanical vibration to clean the water jet nozzle comprehensively and deeply. Through high-pressure gas injection, the tiny particles on the surface of the water jet nozzle can be blown away instantly by a strong airflow to keep the water jet nozzle unobstructed. Water backwashing uses the impact force of the reverse water flow to forcefully flush out the impurities blocked inside the water jet nozzle, ensuring that the high-pressure water flow can pass through the water jet nozzle smoothly. Mechanical vibration can cause the water jet nozzle to vibrate slightly, loosening and falling off the stubborn impurities attached to the water jet nozzle.

[0029] During the cutting process, the water temperature rises rapidly due to the intense friction and energy conversion between the high-pressure water flow and the workpiece. If the water temperature is too high, it will not only affect the performance of the water flow, but may also cause damage to the equipment. The cooling circulation system can effectively remove the heat generated during the cutting process and maintain the stability of the water temperature by continuously circulating the cooling water flow. The system is usually composed of components such as a radiator, a cooling pump, and a temperature sensor. The temperature sensor can monitor the change of water temperature in real time. Once the water temperature exceeds the set threshold, the cooling pump will start and transport the high-temperature water flow to the radiator for cooling, and then send the cooled water flow back to the cutting unit to ensure that the cutting process is always carried out at an appropriate water temperature.

[0030] For example, the water jet cutting unit demonstrated excellent performance when making the heat-insulating tile sand mold for the spacecraft return capsule. The water jet cutting unit can accurately cut various complex shapes of heat-insulating tile sand molds according to design requirements, such as sand molds with curved edges and bevels at different angles. In addition, the automatic nozzle cleaning system can effectively ensure that the nozzle is always unobstructed during the long cutting process, greatly improving the stability and efficiency of the processing. The cooling circulation system can effectively maintain the stability of the water temperature, ensuring that the cutting process continues without being affected by the increase in water temperature.

[0031] The air knife cleaning unit is composed of a high-pressure air source, an airflow control system, a nozzle array and an airflow guide device. The synergistic effect of each part provides a strong guarantee for the cleaning of the workpiece.

[0032] As a power source, the high-pressure air source continuously outputs high-speed airflow, providing sufficient energy for the entire cleaning process. The airflow control system makes extremely fine adjustments to the high-speed airflow. Through advanced sensors and precise control algorithms, it can accurately control the pressure, flow and direction of the airflow, ensuring that the airflow is ejected through the nozzle array in the most suitable state.

[0033] The nozzle array consists of multiple nozzles designed to be arranged in a specific pattern to evenly distribute the high-speed airflow on the surface of the workpiece. When the high-speed airflow passes through the nozzle array and is ejected in a specific pattern, it fully covers the surface of the workpiece. Whether it is tiny particles or fine water droplets, they are completely removed under the impact of this powerful airflow, restoring the surface of the workpiece to its original clean state. The air knife here is not just a single beam, but has great flexibility. It can be composed of multiple beams in different shapes to meet different cleaning needs. For example, when it is formed into a cone, it is like a sharp spear that can accurately penetrate residual impurities and quickly remove them. The cone-shaped air knife is particularly suitable for those local areas that need to be cleaned intensively, and can remove stubborn impurities with a strong impact. When it is formed into a cylindrical shape, it can provide a more uniform and stable cleaning effect. The cylindrical shape can cover the surface of the workpiece in all directions and clean the workpiece comprehensively with a stable airflow. This shape of air knife is suitable for uniform cleaning of large-area workpiece surfaces, which can ensure that the entire workpiece surface can get a consistent cleaning effect. In addition, the shape and form of the air path can be adjusted very flexibly according to the specific shape requirements of the sand mold. Sand molds have different shapes, and different parts may require different cleaning strengths and methods. By cleverly designing the air path, targeted adjustments can be made according to the specific shape of the sand mold. If a certain part of the sand mold requires a stronger cleaning force, the air path can be adjusted specifically to make the airflow more concentrated on that part. For example, by increasing the number of nozzles, adjusting the angle of the nozzles, or changing the pressure of the airflow, the airflow can be more accurately focused on the part that needs to be cleaned, thereby achieving an efficient cleaning effect.

[0034] For example, in the process of sand mold processing for the production of aerospace engine turbine blades, some sand particles, dust and tiny impurities that may be contaminated during the production process will remain on the surface of the sand mold after molding. At this time, the air knife cleaning unit starts to work. The high-pressure air source provides powerful power, and the airflow control system accurately adjusts the airflow parameters so that the airflow is ejected through the nozzle array at a suitable pressure and flow rate. If the air knife is adjusted to a cone shape, impurities in some complex shapes on the mold can be cleaned intensively, such as the small grooves at the root of the blade. Here, the conical air knife is like a precise scalpel, removing stubborn impurities one by one. For larger flat areas of the mold, a cylindrical air knife can be formed to cover the entire surface with a uniform and stable airflow to ensure comprehensive cleaning. The airflow guide device is adjusted according to the shape of the mold to guide the airflow to accurately act on the part that needs to be cleaned. After being processed by the air knife cleaning unit, the surface of the sand mold becomes clean and tidy, providing a good basic condition for the subsequent precision casting process. The sand mold of the turbine blade produced in this way is of higher quality, which helps to improve the performance and reliability of the aerospace engine.

[0035] The waste chip collection unit realizes comprehensive collection, effective treatment and recycling of waste chips by integrating a dust hood, suction duct, high-efficiency filter, waste chip collection container, waste chip compression and drying system and circulating water treatment system.

[0036] The unique design of the dust hood can cover the waste chip generating area to the maximum extent. Its shape and size are carefully designed to ensure close cooperation with the production equipment and not miss any corner where waste chips may be generated. The suction duct and the dust hood are perfectly combined, and the negative pressure technology is adopted to generate a strong suction force. When the production equipment is running, the air near the dust hood is quickly sucked into the suction duct and enters the collection system with the waste chips. The negative pressure technology ensures that the waste chips can be collected comprehensively and quickly, and even the tiny particles can be effectively captured, which greatly improves the efficiency of waste chip collection.

[0037] The HEPA filter is one of the core components of the waste collection unit. It uses advanced filter materials and structural design to effectively separate waste from water mist. When the mixed air containing waste and water mist passes through the HEPA filter, the filter material will block the waste particles, preventing them from moving forward, while the water mist can pass through the filter smoothly. This separation method not only ensures the effective collection of waste, but also avoids the impact of water mist on the subsequent treatment system. At the same time, the high-efficiency filter has high filtering efficiency, which can ensure that the discharged air is clean and pollution-free, meeting environmental protection requirements.

[0038] The waste chip collection container is a device specially used to store processed waste chips. It has sufficient capacity to meet the storage needs of waste chips generated during the production process. The design of the collection container takes into account the characteristics of waste chips and adopts corrosion-resistant and pressure-resistant materials to ensure that the waste chips will not cause damage to the container during storage. At the same time, the container is also equipped with a sealing device to prevent waste chips from leaking, ensuring a clean and safe working environment.

[0039] The waste chip compression and drying system is designed to reduce the volume and moisture content of waste chips for easy storage and transportation. The system first compresses the collected waste chips and compresses them into a smaller volume through mechanical pressure. The compressed waste chips not only take up less space, but also facilitate subsequent processing and transportation. Next, the drying system dries the compressed waste chips. The drying process uses advanced hot air drying technology to heat air and blow it into the waste chips, so that the moisture in the waste chips evaporates quickly. The dried waste chips have a low moisture content and are not easy to breed bacteria and produce odors. At the same time, the stability and storability of the waste chips are also improved.

[0040] After being separated by high-efficiency filters, the water mist enters the circulating water treatment system for purification and reuse. The circulating water treatment system uses multi-stage filtration and disinfection technology to effectively remove impurities and harmful substances in the water mist, making it recyclable. The purified water can be reused in the cooling, cleaning and other links in the production process, realizing the recycling of water resources, reducing production costs, and also reducing the impact on the environment.

[0041] For example, in the production of sand molds for thermal insulation tiles of spacecraft return capsules, the waste chip collection unit is crucial. Its dust hood is tightly installed around the processing equipment, and the suction duct uses negative pressure technology to quickly collect waste chips. The high-efficiency filter separates sand waste chips from water mist. After compression and drying, the waste chips are easy to store and transport and more stable. The water mist enters the circulating water treatment system, and the purified water can be reused. The device can keep the workshop clean, improve mold accuracy and equipment life, realize resource recycling, and provide strong support for the production of spacecraft return capsules.

[0042] The intelligent control system integrates the workbench positioning system, processing path planning software, machine vision system and automation control unit, and introduces artificial intelligence algorithms to achieve all-round monitoring and precise control of the processing process.

[0043] The system precisely integrates the advanced workbench positioning system. Through high-precision sensors and positioning technology, it can accurately determine the position of the workpiece on the workbench in real time. Whether in a complex processing environment or facing workpieces of different shapes and sizes, it can ensure the accuracy of positioning and provide a solid foundation for subsequent processing operations.

[0044] Equipped with powerful machining path planning software. This software can intelligently plan the optimal machining path according to the shape, size and machining requirements of the workpiece. It takes into account multiple factors such as machining efficiency, tool wear, machining accuracy, etc., and calculates the optimal path through complex algorithms, thereby greatly improving machining efficiency and reducing machining costs.

[0045] An advanced machine vision system has been introduced. The system can monitor the position and processing status of the workpiece in real time, and monitor the workpiece in all directions through high-definition cameras and image recognition technology. It can detect the surface quality, dimensional accuracy, processing progress, etc. of the workpiece, and provide real-time feedback information for the processing process. At the same time, the machine vision system can also work closely with the automation control unit to achieve precise control of the processing process.

[0046] It integrates an efficient automatic control unit. This unit can automatically adjust the processing parameters and control the processing process according to the information provided by the machine vision system and the processing path planning software. It can accurately control the tool feed speed, cutting depth, speed and other parameters to ensure processing accuracy and surface quality. At the same time, the automatic control unit also has fault warning and diagnosis functions, which can monitor the operating status of the system in real time. Once an abnormal situation is found, it will immediately issue a warning signal and perform fault diagnosis to ensure the stable operation of the system.

[0047] The intelligent control system also introduces advanced artificial intelligence algorithms. These algorithms can continuously learn and optimize the processing process, automatically adjust processing parameters and path planning based on historical processing data and real-time monitoring information. They can predict problems that may occur during the processing and take preventive measures in advance. At the same time, artificial intelligence algorithms can also be combined with fault warning and diagnosis functions to improve the accuracy and efficiency of fault diagnosis and further ensure the stable operation of the system.

[0048] For example, when making the return capsule insulation tile sand mold, the intelligent control system first uses the workbench positioning system to accurately determine the position of the mold on the processing table. Through highly sensitive sensors, the position error can be controlled within a negligible range, laying a solid foundation for subsequent production processes. The processing path planning software will intelligently plan the most optimized processing path based on the complex structure and strict production requirements of the insulation tile sand mold. For example, when making molds with special shapes and fine textures, the software will fully consider factors such as the cutting angle, feed speed and material removal of the tool to plan a path that is both efficient and ensures production accuracy. The machine vision system monitors the mold status in real time during the production process. When the tool cuts the mold, the vision system can detect whether the cutting depth meets the standard and whether there are defects on the surface. Once an abnormal situation is found in the production process, the system will immediately feedback the information to the automatic control unit. After receiving the feedback information, the automatic control unit quickly adjusts the processing parameters. For example, when the machine vision system detects that the cutting depth is too large, the automatic control unit will automatically reduce the feed speed of the tool to ensure production accuracy. At the same time, if the tool wears, the system will adjust the cutting parameters in time to effectively extend the tool life. The introduced artificial intelligence algorithm continues to learn and optimize throughout the production process. By analyzing a large amount of historical production data, the artificial intelligence algorithm can predict the problems that may occur when making similar insulating tile sand molds, and adjust the processing parameters and path planning in advance, significantly improving production efficiency and quality. In addition, when the system detects a possible fault, the fault warning and diagnosis function of the intelligent control system will be activated immediately. For example, if the cutting force of the tool suddenly increases, the system will judge that there may be a risk of tool wear or breakage, issue a warning signal in time, and perform fault diagnosis. Based on the diagnosis results, technicians can quickly take measures to replace the tool or adjust the processing parameters to ensure the smooth progress of the mold making process.

[0049] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. Complex structure sand mold water jet and air knife composite processing system, characterized by: It includes a water jet cutting unit, an air knife cleaning unit, a waste chip collection unit and an intelligent control system, wherein the water jet cutting unit is used for high-pressure water jet cutting, the air knife cleaning unit is used for high-speed air knife cleaning, the waste chip collection unit is used for waste chip collection and processing, and the intelligent control system is used to coordinate the work of each unit.

2. The complex structure sand mold water jet and air knife composite processing system according to claim 1 is characterized in that: The water jet cutting unit includes a high-pressure water pump, a precision pressure regulating valve, a water flow control system, a water jet nozzle assembly, an automatic nozzle cleaning system and a cooling circulation system; the high-pressure water generated by the high-pressure water pump passes through the precision pressure regulating valve and the water flow control system, and after precise adjustment, it is ejected at an extremely high speed through the water jet nozzle assembly to achieve precise cutting; the automatic nozzle cleaning system is used to ensure that the water jet nozzle is unobstructed, and the cooling circulation system is used to maintain a stable water temperature during the cutting process.

3. The complex structure sand mold water jet and air knife composite processing system according to claim 2 is characterized in that: The air knife cleaning unit consists of a high-pressure air source, an air flow control system, an air knife nozzle assembly and an air flow guide device; the high-speed air flow generated by the high-pressure air source is precisely adjusted by the air flow control system, and then powerfully ejected in a specific mode through the air knife nozzle assembly, fully covering the surface of the workpiece, and completely removing the tiny particles and water droplets remaining after cutting.

4. The complex structure sand mold water jet and air knife composite processing system according to claim 3 is characterized in that: The waste debris collection unit integrates a dust hood, an air suction duct, a high-efficiency filter, a waste debris collection container, a waste debris compression and drying system, and a circulating water treatment system; the dust hood is arranged outside the water knife nozzle assembly and the air knife nozzle assembly, and realizes omnidirectional collection of waste debris together with the air suction duct, the high-efficiency filter separates waste debris and water mist, the waste debris is stored in the waste debris collection container after being processed by the compression and drying system, and the water mist is purified and reused by the circulating water treatment system.

5. The complex structure sand mold water jet and air knife composite processing system according to claim 4 is characterized in that: The intelligent control system integrates the workbench positioning system, processing path planning software, machine vision system and automatic control unit, and introduces artificial intelligence algorithm; it is used to monitor the workpiece position and processing status in real time, automatically optimize processing parameters and paths, ensure processing accuracy and efficiency, and at the same time, has fault warning and diagnosis functions to ensure stable operation of the system.

6. The complex structure sand mold water jet and air knife composite processing system according to claim 5 is characterized in that: The application method of the system includes the following steps: Step 1: Workpiece preparation and clamping: Place the sand mold workpiece to be processed on the workbench and fix it. The intelligent control system starts the workbench positioning system to ensure accurate alignment of the workpiece; Step 2: Water jet cutting: Start the water jet cutting unit and perform precise cutting according to the preset processing path and parameters. During the cutting process, the automatic nozzle cleaning system works regularly to keep the water jet nozzle unobstructed; Step 3: Air knife cleaning: After cutting is completed, the air knife cleaning unit is immediately started, and high-speed airflow is ejected through the air knife nozzle assembly to cover the surface of the workpiece and remove residual tiny particles and water droplets. After the cleaning process is completed, the system automatically shuts down the air knife cleaning unit; Step 4: Waste collection and treatment: During the cutting and cleaning process, the waste collection unit continues to work; the dust hood and the suction duct combine with negative pressure technology to suck the mixture of waste and water mist into the high-efficiency filter for separation. The separated waste enters the compression and drying system for treatment and storage; the water mist enters the circulating water treatment system for purification and reuse in the cutting process or other purposes; Step 5: Finished product inspection and subsequent processing: After processing is completed, the finished product is inspected for quality to ensure that it meets the requirements, and then subsequent processing such as polishing and painting is carried out as needed.

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