Preparation of process equipment, general-purpose tooling only need to open a list of details, to the procurement department can be purchased. Therefore, a large number of tooling preparation work is mainly in the design and manufacture of specialized tooling. Because of the preparation of special tooling, similar to the production of enterprise products, technical preparations, it also requires a set of design, drawing, process regulations, two types of tooling preparation, materials, blanks ready for processing and inspection and a series of processes.
Classification of process equipment:
Process equipment in accordance with its scope of use, can be divided into two kinds of general and specialized.
1, general-purpose process equipment (referred to as general-purpose tooling) applies to a variety of products, such as commonly used tools, gauges, generally a lower amount of single piece of financial accounting for the treatment of low-value consumables, asset valuation, almost not included in fixed assets.
2, special process equipment (referred to as special tooling), that is, only applies to a certain product, a component, a process, is a special asset, and most of the single piece amount is higher, in line with the definition of the same asset and recognition conditions.
Specialized by the enterprise's own design and manufacture, and generalized by the professional factory manufacturing. Specialized process equipment for a wide range of functions, uses, many categories, can be broadly divided into the following categories: cutting tools (special); gauge (special); tools (special); fixtures - machine tools (machining) fixtures, welding fixtures, assembly fixtures, inspection fixtures and so on.
The number of process equipment to decide:
Generally speaking, the number of special process equipment and the type of production, product structure, and the reliability of the product in the use of the process requirements and other factors related to a large number of large-scale production requirements of more special fixtures, while a single piece of small batch production should not be used; the more complex the structure of the product, the higher the technological requirements, out of consideration of the quality of processing, should be used; products and fixtures should be used more; products and fixtures, assembly fixtures, inspection fixtures, and so on. Should be used; product and tooling series, standardization and generalization of the higher degree of plant, the number of special tooling can be appropriately reduced.
In addition, in different stages of production on the number of tooling requirements are also different, even in mass production, sample trial stage is only more complex parts design and manufacture of key tooling; to the formal production stage should be designed and manufactured process requirements of all tooling, including quality assurance, improve efficiency, safety and reduce labor intensity and other tooling required.
The number of specific special tooling can be developed in the process program, according to the production of various industries and product characteristics, the actual situation of enterprises, reference to empirical data, the use of special tooling coefficients to determine the calculation.