where - Hprthe maximal depth of profiling of average on width of a peal of a part, mm; Z - the current distance from a point of the beginning of change between cylinder a backlash at profiling up to settlement value, mm; B pr - width profile parts of a peal, mm; a - an exponent of a parabola on which profiling is carried out
Figure 1 Circuit of profiling of peals (cross-section section).
Speed of moving of workers celinders in a vertical plane at profiling is defined under the formula
Where V - speed proskating rinks, mm/c.
Values of a parameter have defined statistically on the basis of experimental researches of parameters of the form of the peals executed on laboratory mill duo-kvarto DonNTU.
It is received
Where h - accordingly thickness and width of peals before the miss with profiling
The form of peals, rolling on existing technology, is shown on fig. 2
Figure 2 Form of peals in the plan.
It estimated on length of the forward and back rough ends of camber on width
Depending on initial thickness H 0 and total relative reduction. Here B p , B z - width accordingly the forward and back ends of a peal.
Dependences are received
Where D - diameter of workers celinders; The average mistake of approximation of the received equations makes accordingly 10 and 22 %. The equations are received at change of parameters proskating rinks in limits:
The received equations testify, that on known parameters proskating rinks H 0 /D and e are an opportunity with sufficient for practical purposes accuracy to define elements of the form of a peal with which help it is possible to estimate waste products of metal with cut. Results of researches have shown, that waste products with cut basically are influenced with lengths of the forward and back rough ends. The total length of the ends is in limits from 100 up to 500 mm, that in relation to the general length of a peal makes 7-20 %. Calculation of the area of a surface of peals testifies that due to improvement of the form of ready peals it is possible to reduce waste products of metal with face cut up to 3-8 %. By results of a tentative estimation of the form of peals, as well as at Laboratory researches, have defined depth and extent of profiling. Preparations in the size profile with variable reduction on length, depth of profiling made 0,8 mm, and length of a site with a ready structure of 100 mm. The cross-section section profile preparations is shown on fig. 3.
Figure 3 Cross-section section profile preparations
The described way has received the name in Japan MAS-PROCESS (automatic system of regulation of the form of a sheet). The principle of regulation at MAS-PROCESS consists in precomputation of the form of a peal on the created mathematical model (makes the COMPUTER) and giving to a peal in last miss at broach(for management of camber on width) or in last miss at breakdown of width (for reduction of length of rough end faces) the variable strictly certain longitudinal structure (fig. 4).
Figure 4 Circuit of formation lateral (à) and face (á) edges of a peal at MAS - process.
For the account it is artificial created different thick distortion of the form of a peal is compensated at the longitudinal circuit proskating rinks. Thus angular speed celinders, the moment of inclusion and deenergizing of press screws, size of their moving expect in the special mini computer. After development of system on TSM 5500 factories in Midzusima losses of metal in cut (at the first stage of development of system) have decreased from 5,5 % to 1,1 %, and the output suitable has made 93,8 %, further the output suitable on mill 5500 has reached 96 %.
CONCLUSIONS
The way proskating rinks with profiling wide sides of peals has the certain restrictions. At use of some circuits proskating rinks and the certain sizes of slabs and ready sheets it is impossible to receive the form of peals in the plan close to rectangular. It is connected by that after profiling at breakdown of width last has exceeded set or the ambassador broach the length of a peal has exceeded allowable. It is necessary to choose correctly the sizes of a slab at preservation of the set weight. The success of Japanese speaks that on modern TSM Japan there are high-speed hydraulic press devices, and process proskating rinks copes with the help of the COMPUTER. On TSM and Russia these obligatory conditions are not present Ukraine. Therefore process also is not mastered.