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153results about How to "Small batch" patented technology

Processing crafts and tools of serrated lock washers external teeth

The invention discloses processing crafts and tools of serrated lock washers external teeth. According to the tools, a middle guide pillar mould base is adopted, and forming of parts is achieved by utilizing a manner that mold inserts provided with sawteeth are pressed mutually, wherein the mold inserts are arranged on end heads of an upper mold and a lower mold. In the process of machining of serrated lock washers external teeth part products, once tooth-pressing forming of the part products can meet the requirements of size and a performance test, and technological process is optimized by utilizing the crafts and the tools. And quality of the products machined by the crafts is guaranteed, and part-taking process is very convenient. The tools are simple in structure, flexible in machining method, accurate and reliable in positioning, and high in production efficiency, and the parts are convenient to assemble and disassemble. Guiding functions and valve of use for reference can also be provided for those internal serrated washer products which are large in types and varieties and specifications, small in batch and short in production cycle. And new product development of other similar structures can also be enlightened, and the processing crafts and the tools of the serrated lock washers external teeth are worthy of being popularized.
Owner:GUIZHOU AEROSPACE PRECISION PRODS

Precision reliability analysis method for heavy numerical control machine tool

The invention belongs to the field of reliabilities of numerical control machine tools, and particularly relates to a precision reliability analysis method for a heavy numerical control machine tool based on a multi-body system kinemics theory. The precision reliability analysis method comprises the following steps: constructing a relation model between the output precision error of the heavy numerical control machine tool and a factor affecting the precision of the machine tool, fitting a change relation of the factor affecting the precision of the machine tool along with the time by a random process, finally combining on-site data or data of the same type of sample, and introducing a Bayes evaluation method to update the precision error model of the heavy numerical control machine tool, thus realizing evaluation of the precision reliability of the machine tool. The precision reliability analysis method has the beneficial effects that the Bayes evaluation method is introduced to fit and correct the change tendency of respective factors causing a motion precision error of the machine tool, so that the difficulty that a sufficient statistical sample cannot be formed due to a 'small sample' is solved; and therefore, more scientific and reasonable evaluation is performed on the dynamic reliability of the precision error of the heavy numerical control machine tool.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
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