Applying the concept of green manufacturing to mechanical manufacturing processes has enabled my country's machinery manufacturing industry to achieve breakthrough development, breaking the traditional development model that is incompatible with the economic environment. While improving the economic benefits of machinery manufacturing enterprises, it has also effectively protected the ecological environment, achieving a win-win situation for the economy and the environment, and promoting the sound and rapid development of my country's machinery manufacturing industry.
1. Theoretical basis of green manufacturing technology
1.1 Basic Technological Types of Green Manufacturing Processes
1.1.1 Energy-saving technologies
Energy-saving technology is one of the green manufacturing technologies used in mechanical manufacturing. It mainly achieves reduced energy loss and improved processing efficiency through techniques such as friction reduction and the adoption of low-energy construction methods. Mechanical manufacturing processes consume a significant amount of energy; however, only a portion of the energy generated from raw materials or energy sources is converted into usable energy, while the remainder is directly consumed or wasted. For example, energy is lost during friction, which can potentially impact the mechanical manufacturing process and reduce its reliability.
1.1.2 Energy-saving process technology
Conservation emphasizes the saving of raw materials and energy. This is primarily achieved through appropriately simplifying production processes. On one hand, from a design perspective, precise calculations are used to rationally determine the weight and quantity of parts during product design, thereby improving the utilization rate of raw materials. On the manufacturing process, new cutting tools can be used to extend their service life and reduce energy consumption during tool use. Dry machining technology is employed to achieve resource conservation and reduce environmental pollution; advanced manufacturing technologies are used to pre-optimize the blanks, minimizing the consumption of raw materials during manufacturing.
1.1.3 Environmentally friendly process technologies
Environmentally friendly process technologies utilize technological advancements to reduce or eliminate pollutants generated during the manufacturing process. This technology is the most direct and effective method for protecting the ecological environment. When the necessary elements are input into the system during processing, the system defaults to outputting materials unrelated to product production. This technology enables the handling of materials unrelated to the end of mechanical production, thereby reducing pollution from waste liquids and exhaust gases.
1.2 The Importance of Green Machinery Manufacturing Technology
With the proposal of a resource-saving society and the vigorous development of energy conservation, environmental protection, and circular economy initiatives across the country, green and low-carbon concepts have taken root in people's hearts, creating a favorable development environment for building a resource-saving and environmentally friendly society in my country. As a crucial pillar industry of the national economy, the manufacturing sector is also adapting to this trend, actively promoting the research and innovation of processes and technologies. In traditional manufacturing, the long-term neglect of environmental and resource waste has resulted in the generation of numerous waste gases and wastewater during production, leading not only to insufficient resource utilization but also to severe environmental pollution. With the emergence and application of green machinery manufacturing processes, traditional processing models are gradually shifting towards cleaner production and waste recycling. Today, society demands high-quality, low-energy-consumption products. Therefore, only by utilizing green machinery manufacturing technologies and fully considering resource utilization and environmental protection can resources be optimally allocated and rationally utilized, achieving a double harvest of environmental and economic benefits.
2. Application of green manufacturing technologies in mechanical manufacturing processes
2.1 Use green raw materials
To achieve green manufacturing, environmentally friendly raw materials should be used in manufacturing processes. These materials should also meet the requirements of mechanical manufacturing processes and possess excellent performance characteristics. Specifically, in selecting raw materials, environmental and material compatibility should be prioritized; toxic, harmful, or radioactive materials should be avoided. Using such raw materials allows for reuse after use, reducing resource waste.
Secondly, raw materials that are abundant, low-cost, and low-pollution should be selected, while expensive and highly polluting materials should be avoided. Finally, it is best to use recyclable or already recycled raw materials during manufacturing to achieve resource recycling and reduce waste in the manufacturing process.
Applying the concept of green manufacturing to mechanical manufacturing processes has enabled my country's machinery manufacturing industry to achieve breakthrough development, breaking the traditional development model that is incompatible with the economic environment. While improving the economic benefits of machinery manufacturing enterprises, it has also effectively protected the ecological environment, achieving a win-win situation for the economy and the environment, and promoting the sound and rapid development of my country's machinery manufacturing industry.
2.2 Utilize advanced technologies
To ensure the integration of green principles into mechanical manufacturing processes, advanced technologies should be incorporated. For example, rapid prototyping technology can be used. This technology utilizes a rapid prototyping machine, which first establishes a model using data from CAD software, then stacks layers of the model. The advantage of this machine is that it operates without any cutting tools, molds, or fixtures, and can create complex shapes or three-dimensional parts in a very short time. Therefore, this technology not only effectively saves resources and reduces manufacturing costs, but also enables the production of many new types of mechanical equipment.
In mechanical manufacturing processes, near-zero-cutting machining technology can also be used. This technology is a new type of technology derived from new technologies and processes. When used, it leverages precision casting, cold extrusion, deposition modeling, and other forming technologies and engineering materials in mechanical manufacturing, pushing the shape of mechanical parts towards precision forming. Through this free-form machining technology, production costs can be effectively reduced, as well as energy and resource waste in mechanical product manufacturing.
2.3 Application of Green Cutting Technology
Green cutting technology can also achieve energy conservation and emission reduction requirements in mechanical manufacturing processes. Since cutting fluids used in cutting mechanical products contain certain pollutants, green cutting technology can effectively solve this pollution problem. This technology mainly involves several methods, including dry cutting, cryogenic cutting, and green cryogenic cutting. However, there are still some issues regarding purification and cutting fluid development, preventing its full utilization. Therefore, relevant technical personnel should strengthen the development of this technology to better integrate it into mechanical production.
2.4 Application of Vibration Stress Relief Method
In the manufacturing process of machinery, raw materials generally require special treatment. This process not only effectively reduces the stress in the material but also significantly enhances the performance of the mechanical products. However, using thermal aging can damage the material's properties and greatly increase manufacturing costs. Therefore, vibration stress relief can be used instead. This method allows for lattice slip in the metal components of the material, altering the metal's plasticity and effectively reducing stress, thus achieving the goals of cost reduction and waste avoidance.
2.5 Application of Remanufacturing Technology
Remanufacturing technology primarily involves processing unusable or expired parts and then incorporating these processed parts into machinery production, thereby effectively reducing resource waste and extending the lifespan of the machinery. However, when using this technology, it is crucial to ensure the performance of the machinery and to avoid using substandard parts in the manufacturing process.
2.6 Automated and Intelligent Mechanical Manufacturing Processes
Automated and intelligent mechanical manufacturing processes can reduce labor costs and improve production safety. Taking a two-stage automated hydraulic pipe forming machine as an example, combined with specialized molds for pipe forming, it not only effectively reduces labor costs and meets users' stringent requirements for pipe fittings, but also ensures safety by employing an infrared safety wall system that automatically detects the worker's operating position. The machine cannot start until the worker's hands have left the equipment, effectively guaranteeing the worker's personal safety. Its safety and intelligent modes represent an effective application of green mechanical manufacturing design.
2.7 Use green packaging for mechanical products
Green packaging for machinery products refers to packaging that does not pollute the environment, and whose materials are biodegradable and recyclable. Therefore, packaging for machinery products should not only be aesthetically pleasing and economical, but also consider its environmental impact, balancing economic development with sustainable environmental sustainability.
2.8 Implement green recycling of mechanical products
Reasonable recycling and reuse of scrapped machinery products can minimize production costs and greatly facilitate enterprises in optimizing and improving their machinery products. This allows enterprises to continue to develop greener, more environmentally friendly, and energy-saving machinery products based on the existing products.
The following principles govern the green recycling of machinery: First, for machinery that can still be used, green recycling involves repairing and maintaining the product, allowing it to be sold as second-hand machinery. This increases the recycling rate of machinery and reduces waste of resources and materials. Second, for machinery that can no longer be used, green recycling should begin with manual disassembly. Usable parts should be recycled, while unusable parts should be sorted and processed.
In conclusion, the concept of green machinery manufacturing is a systematic science that comprehensively optimizes factors such as product performance, manufacturing costs, and environmental resource costs. It cannot only consider minimizing the costs for individual manufacturing enterprises; it must focus on optimizing the overall social cost throughout the product's lifecycle. As a modern machinery manufacturing model, green manufacturing technology emphasizes the promotion of energy conservation and environmental protection, thus aligning with the sustainable development strategy of the machinery manufacturing industry and possessing broad development prospects. Many green manufacturing technologies already developed not only achieve environmental protection goals but also effectively change the structure of the machinery manufacturing industry, laying the foundation for the realization of sustainable development strategies and the application of new technologies and products.
