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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





 28  Stanochniy park                                                                              Stanochniy park       29
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