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PROFESSIONAL ADVICE                                                                                                                                                                                         PROFESSIONAL ADVICE

                                                                       Multi-tool      machines,        composed        of              Design experience has shown that the most labor-intensive and metal-intensive beds can
                                                                normalized  and  partially  special  units  are                  be unified. We have developed welded beds with subsequent artificial aging. The result is a fairly
                                                                called aggregative. These machines are used in                   wide range of welded products with a large volume of welding and heat treatment, which must
                                                                large-scale  and  mass  production.  On  modular                 be mastered by the welding workshop. After the development, the workshop began to work at
                                                                machines,  you  can  perform  drilling, reaming,                 an intermediate warehouse, handing over finished products to the reserve. The next object of
                                                                countersinking, boring, milling, cutting internal                unification was the hydraulics of modular machine tools. Initially, a range of hydraulic cylinders
                                                                and external threads, some types of turning.                     was developed with a completely new design, taking into account the level of production.
                                                                       Aggregate  machines  are  mainly  used  for
                                                                making body parts. The end result of machine
                                                                tool aggregation is machine systems in the form
                                                                of  flexible  production  systems  of  technological
                                                                equipment.  Modern  machine  tool equipment
                                                                is  the  basis  for  the  development  of  flexible

        Fig. 3. Modular milling head of the aggregate machine.  automated production, which sharply increases
                                                                labor productivity in conditions of medium and
                                                                small batch production.
        Microprocessor control devices transform the machine into a machine module that combines
        flexibility and versatility with a high level of automation. The machine module is capable of
        processing  a  wide  range  of  work  pieces  in  an  off-line  mode  based  on  low-manned  or  even
        deserted technology.

               Advantages of modular machines:
        • short design terms;
        • ease of manufacture, due to the unification of units, mechanisms and parts;
        • high productivity due to multi-tool processing of blanks from several sides at the same time;
        • the ability to reuse part of the units when changing the production facility;
        • the ability to service machines by a low-skilled operator.
               In  the  70s,  design and  manufacture  of  modular  machine  tools for  equipping the
        agricultural  machine-building  complex  was  established  in  Uzbekistan.  Serial  production  of
        agricultural machinery, which was gaining momentum, increasingly required the automation
        of the metalworking process. Aggregate machines                                                                          Fig. 5. Original unified blocks with electrohydraulic control devices.
        first  took  over  individual  operations,  and  soon
        became an integral part of aggregate modules and                                                                                Based on the use of conventional automation devices, a typical hydraulic unit was developed.
        automated  lines.  This  required  an  intensification                                                                   The hydroelectric power station was created without a hydraulic panel, but with original unified
        of  the  design work and  the  work of  the  new                                                                         blocks  with electrohydraulic  control  devices  based  on  plates  for  butt  mounting  of  pressure
        production.  The  question of  the  development  of                                                                      control valves of flow regulators and electromagnetic distributors, recruited depending on the
        unified  units  and  parts  of  modular  machine  tools                                                                  hydraulic circuit. Subplates are a convenient way to assemble multiple hydraulic components
        and the organization of their small-scale production                                                                     in one place. They provide a compact design, fewer leaks, easy maintenance, a 30% to 50%
        came to light. The already mastered units and parts                                                                      reduction in assembly and installation costs, and the ability to install monitoring devices as
        in other industries became the basis; they were to                                                                       close to equipment as possible.
        be introduced into the design of machine tools and                                                                              Numerous  hydraulic  lines have  disappeared,  and  the  operation  and  changeover  of
        into production. Despite the apparent simplicity of                                                                      the  hydraulic  system  has  become  convenient.  The  most  labor-consuming  elements  of  the
        the  task,  it turned  out  to be  rather  complicated.                                                                  hydroelectric station appeared in the warehouse. As a result of the work carried out, a significant
        Initially,  the  enterprise  standards  were  developed                                                                  base  of  high-quality  unified  work  units  and  parts  has  appeared,  with  working  design  and
        for the most commonly used units and parts.                                                                              technological documentation developed on them and mastered production. This greatly reduced
               After long-term development and coordination            Fig. 4. Modular hydraulic station of the modular machine.  the development time of new equipment, its manufacture, and made it possible to readjust the
        with the design department, the standards were introduced through the development of working                             equipment during operation. All developments were raised to the rank of enterprise standards
        design documentation. They have successfully passed the production approbation, and all the                              and standard working drawings were developed for them, which were used to complete projects
        services gradually got used to them. All this time, the author of the development of standards                           of modular machine tools. The rest, power tables and rotary tables, were purchased from other
        was constantly next to the designers and technologists, jointly solving numerous issues.                                 enterprises.
               Even such obstacles as the case of an oil flash during the heat treatment of the milling
        spindle or thermal configuration changes during welding of body parts did not affect the result,                         (To be continued).
        but only were a factor in more scrupulous development of the enterprise standards. However,
        in spite of everything, the designers were the first to feel the power of the worked out unified
        units, the convenience and the need for further work in this direction. Manufacturers got the                                                                                                                Alexander Nusratovich Mamedov,
        opportunity to work because of future orders; unified units appeared in the workshop warehouse                                                                                                                      head of non-standardized
        for finished products.                                                                                                                                                                            and special equipment of UZLITINEFTGAZ JSC





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