The manufacturing methods of the manufacturing industry are constantly changing with the development of manufacturing equipment and the emergence of new manufacturing concepts. From traditional manufacturing to modern manufacturing, the concept of machine tool fixtures has evolved.
The main equipment for traditional processing is a common machine tool . In traditional manufacturing, the relevant dimensions and positional accuracy of the machined parts are completely guaranteed by the fixture. During the machining process, the fixture controls the relative position of the workpiece to the spindle of the machine and the relative position of the workpiece to the tool . A number of conventional machine tools form a production line that serves only one part of the manufacturing process, that is, a machining line characterized by a separation system in which the processes are dispersed. At this modular fixture (special fixtures are also the same) to be completed it is: a process for a workpiece can be accurately loaded clamp structure providing machine coordinate position on a machine tool, and at the proper position of the workpiece with the tool. This requires the fixture to have more sophisticated functions and more complex structures to meet the different needs of traditional machining processes.
In the traditional manufacturing processing mode, the efficiency of the workpiece relative to the fixture and the machine tool in a single processing time is required, that is, the workpiece is required to be quickly clamped, and then the quick removal and quick assembly of the next part, the workpiece is on the fixture (ie on the machine tool ) The shorter the stay time, the better. In this manufacturing mode, the relationship between the machine tool and the workpiece and the fixture is characterized in that the complex and multi-functional fixture is mounted on the machine tool , and the workpiece is quickly loaded and unloaded after each machining, and the same batch of parts is processed. , for fixture replacement. Therefore, there is no repeated quick docking between the fixture and the machine tool , and there are only repeated and rapid positioning of the workpiece and the fixture. At this time, the technical application and development of the combined fixtures are aimed at how to develop a wider range of component series and a more complete fixture structure.
Since the 1980s, flexible manufacturing technology has been rapidly developed and applied in China. The modern manufacturing and manufacturing modes formed by flexible manufacturing units (FMC) and flexible manufacturing systems (FMS) have had a profound impact on the combined fixtures.
In a flexible manufacturing unit or a flexible manufacturing system, the structural dimensions of the machined part are completely obtained and guaranteed by the machine tool , that is, the positional relationship between the tool and the workpiece is automatically determined and guaranteed by the machine tool , so that the guiding device of the tool is not required. The main role is to clamp the workpiece accurately loaded in the machine coordinate system, such modern machine already has many of the features of the fixture, such as index table, and the pair of guide angle of tools like structure, various types of vises are gradually As a standard accessory, the fixture structure has also evolved from complex to simple.
Compared with the traditional "separation system", the production integration form "integration system" formed by flexible manufacturing technology organically combines various parts of the machine tool into an integrated system. The processing is no longer pursues the efficiency of a single process, but pursues system-wide production. Increased efficiency. In the flexible production, the mixed flow production for many varieties and small batches makes the requirements for the fixture change in production preparation. Under the guidance of modern manufacturing concepts, the traditional building block combination fixture has been given a deeper connotation. The traditional advantages of the combination of structural fixtures are considered by the industry to be “faster, more concise, and more compatible with modern machine tools . Flexible process equipment." The combination fixture has been modified and finally become a flexible combination fixture widely used in automotive manufacturing.
The main equipment for traditional processing is a common machine tool . In traditional manufacturing, the relevant dimensions and positional accuracy of the machined parts are completely guaranteed by the fixture. During the machining process, the fixture controls the relative position of the workpiece to the spindle of the machine and the relative position of the workpiece to the tool . A number of conventional machine tools form a production line that serves only one part of the manufacturing process, that is, a machining line characterized by a separation system in which the processes are dispersed. At this modular fixture (special fixtures are also the same) to be completed it is: a process for a workpiece can be accurately loaded clamp structure providing machine coordinate position on a machine tool, and at the proper position of the workpiece with the tool. This requires the fixture to have more sophisticated functions and more complex structures to meet the different needs of traditional machining processes.
In the traditional manufacturing processing mode, the efficiency of the workpiece relative to the fixture and the machine tool in a single processing time is required, that is, the workpiece is required to be quickly clamped, and then the quick removal and quick assembly of the next part, the workpiece is on the fixture (ie on the machine tool ) The shorter the stay time, the better. In this manufacturing mode, the relationship between the machine tool and the workpiece and the fixture is characterized in that the complex and multi-functional fixture is mounted on the machine tool , and the workpiece is quickly loaded and unloaded after each machining, and the same batch of parts is processed. , for fixture replacement. Therefore, there is no repeated quick docking between the fixture and the machine tool , and there are only repeated and rapid positioning of the workpiece and the fixture. At this time, the technical application and development of the combined fixtures are aimed at how to develop a wider range of component series and a more complete fixture structure.
Since the 1980s, flexible manufacturing technology has been rapidly developed and applied in China. The modern manufacturing and manufacturing modes formed by flexible manufacturing units (FMC) and flexible manufacturing systems (FMS) have had a profound impact on the combined fixtures.
In a flexible manufacturing unit or a flexible manufacturing system, the structural dimensions of the machined part are completely obtained and guaranteed by the machine tool , that is, the positional relationship between the tool and the workpiece is automatically determined and guaranteed by the machine tool , so that the guiding device of the tool is not required. The main role is to clamp the workpiece accurately loaded in the machine coordinate system, such modern machine already has many of the features of the fixture, such as index table, and the pair of guide angle of tools like structure, various types of vises are gradually As a standard accessory, the fixture structure has also evolved from complex to simple.
Compared with the traditional "separation system", the production integration form "integration system" formed by flexible manufacturing technology organically combines various parts of the machine tool into an integrated system. The processing is no longer pursues the efficiency of a single process, but pursues system-wide production. Increased efficiency. In the flexible production, the mixed flow production for many varieties and small batches makes the requirements for the fixture change in production preparation. Under the guidance of modern manufacturing concepts, the traditional building block combination fixture has been given a deeper connotation. The traditional advantages of the combination of structural fixtures are considered by the industry to be “faster, more concise, and more compatible with modern machine tools . Flexible process equipment." The combination fixture has been modified and finally become a flexible combination fixture widely used in automotive manufacturing.
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