Efficient speciality is a typical feature of crankshaft manufacturing equipment. Due to the particularity of the structure of the crankshaft, the speciality of the machine tool is determined. Only by properly applying the appropriate machine tool can the high-efficiency speciality of the crankshaft machine tool be realized, thereby improving the processing efficiency of the process.
The high efficiency of the engine crankshaft processing machine is a typical feature of crankshaft manufacturing equipment. The basic requirements for “efficiently efficient†machine tools are high stiffness, high speed and high power. The basic feature of high-efficiency special-purpose machine tools is the “tailor-made†type, which provides personalized products according to user needs.
Overall solution requirements
High-efficiency dedicated machine tools are “lean machine tools†that remove redundancy and are highly efficient and highly targeted. The delivery method of modern high-efficiency special machine tools is the overall solution. The overall solution has the following requirements:
1. Collaborative engineering is required from the development of the equipment to the start-up of production - with upstream and downstream partners (suppliers) and users, through the design of a dynamic alliance. Joint development runs through the entire process, serving users throughout the product life cycle.
2. Suppliers are familiar with user products (including new products that predict medium-term development), are familiar with user processes, have programming capabilities, equipment optimization capabilities, process equipment capabilities and integration capabilities, and can integrate process systems, logistics systems, and information systems. Become a manufacturing unit and the corresponding personnel training.
3. Suppliers are required to have independent technological innovation capabilities, providing not only comprehensive but also the “best†solutions that can be achieved by contemporary technology. Involve independent innovations that enable suppliers to “pull†user needs. At the same time, a number of innovations accumulated in the process of joint development with users lay the foundation for the “originality†of the developed products.
4. Suppliers are also required to have economic analysis capabilities, be able to propose several options and quotations based on user funds (including dynamic funds), and provide investment return period and profit analysis for users.
5. Require users to provide drawings of the workpieces to be machined or their typical workpiece drawings and technical requirements; propose the productivity (single piece processing time) and quality level (all should be appropriate high level); the workpiece is processed before and after the machine tool The situation allows the machine tool to be put into production as soon as it arrives at the factory, and the processing efficiency and processing quality can immediately and reliably meet or exceed the requirements originally set by the user, and quickly create benefits.
Three cases of typical crankshaft high efficiency special machine tools
1. CNC car - car pull machine
The brake technology originated from a technical patent in the United States and has been gradually developed in crankshaft machining. The current development is more common, and it is widely used in the machining of the main journal and the connecting rod journal of the semi-finished crankshaft. The form of the car pull technology can be divided into three types: linear car pull, inner ring cutter rotary car pull and outer ring cutter rotary car pull. The car pull process was developed around 1983. From the short period of 1983 to 1988, the car pull process developed from a linear type to a rotary type. In 1988, it developed into a car-car pull process. The cutting method is also gradually replaced by the combing process. The main features are: one setting can complete all concentric turning, with the same car-car drawing on the same machine, high efficiency, through the use of special chucks and tools The system realizes the advantages of flexible processing, simple maintenance of machine tools and low maintenance cost. It is especially suitable for crankshafts where the side of the balance block does not need to be machined and the journal has undercut grooves. The broaching process can be replaced by an efficient combing technique. The combing process is usually placed in the last step of the process, and high-speed finishing is achieved by a small amount of radial feed and longitudinal turning. The comb knife process has the advantages of high precision, high efficiency, easy chip cleaning and small axial feed. Figure 1 shows a double-cutter-car pull machine.
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