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Mathematical model of dynamics of device for applying polymer composition on grind parts of the clothes
DOI: http://dx.doi.org/10.20534/ESR-16-11.12-129-131
Djuraev Anvar Djuraevich, doctor of technical sciences, professor, Tashkent Institute of Textile and Light Industry, E-mail: djuraevanvar1948@mail.ru Behbudov Shavkat Husenovich Research associate-the competitor, Tashkent Institute of Textile and Light Industry, E-mail: kapitan1607@mail.ru Tashpulatov Salih Shukurovish, doctor of technical sciences, professor, Tashkent Institute of Textile and Light Industry, E-mail: barno.professorov@mail.ru Mansurova Munisa Anvarovna, candidate for technical sciences, Tashkent Institute of Textile and Light Industry, Republic of Uzbekistan E-mail: djuraevanvar1948@mail.ru Alimukhamedova Barno Gayratovna Research associate-the competitor, Tashkent Institute of Textile and Light Industry, E-mail: barno.professorov@mail.ru
Mathematical model of dynamics of device for applying polymer composition on grind parts of the clothes
Abstract: This paper presents the scheme and operation of mathematical model of the dynamics of the device for applying the polymer composition to grind down the details of clothing. The settlement scheme and mathematical the module of dynamics of movement of a roller of the device is given.
Keywords: Devices, a polymeric composition, grinding, details, clothes, the settlement scheme, the equations movement.
Existing apparatus for applying a polymer composition onto slices parts of garments, which contains a bath of the polymeric composition, one above the other rollers, which are mounted on the shafts, and designed as a rubber bushing and impaled on it plastic simple sleeve interconnected with adhesive, wherein along the edges of the outer surface of the porous plastic sleeve protrusions smoothly interfaced with the sleeve surface, the lower roller immersed in a bath, and the top is connected to the upper tub [1].
The disadvantage of this design is the impact of the rigid porous plugs to grind materials, which are applied to the polymer material, wherein the thickness of the applied polymer coating may have a different thickness due to the inhomogeneity of the crosslinkable materials. Besides, no clear limit on the strips of polymer coating materials, as well as uneven flow of the liquid phase of the polymeric material, its thickness may have different meanings in grind materials. To eliminate these shortcomings we recommended a new design. The proposed design illustrated by a drawing, where Figure 1, shows a general view of the device for applying the polymer composition to grind parts cut.
An apparatus for applying a polymer composition onto garments grind part comprises a housing 1, the upper and lower component rollers mounted on the shafts 2 and having a resilient (rubber) bush 3, a deformable (rubber) sleeve 4 with a truncated conical through-holes 5 on the surface thereof, and protrusions 18, the edges of the sleeves 4 and 6 and the bearings 7, 8 upper bath to the polymer composition, the lower the bath 19 with the polymer composition, feed tube 9 with polymer feeding controller 10.
The proposed device operates as follows. When sewing fabrics pressed by the foot 14, the rack 15 and the needle plate 17. Promotion fabric on the stitch value is carried rack positioned in the slot of the needle plate. The rack submits the material just under the needle 16, and the direction of movement of material during sewing worker needs. When the needle 16 and the interaction of the hook (not shown) is formed lockstitch. Then grind materials fall under mutually rotatable upper and lower component rollers mounted on the shafts 2 and connected with the housing of the sewing machine 1 by means of bearings 6 and 7.
In the process of moving from the upper tissue bath 8 through the feed pipe 9 is supplied to the polymer composite deformable porous surface truncated conical through-holes 5 of the sleeve 4 and the upper roller is applied to the upper layer 11 of fabric 13. The film feed polymer composition is regulated by the regulator 10. At the bottom fabric layer 12, grind resin composition 13 is applied by deforming a porous sleeve 4, the lower roller having a porous surface and also truncated conical through-holes on the surface of the sleeve and is partially recessed into the polymer solution composition at the bottom of the bath 19.In the process of grinding the polymer composition is applied to a strip width of 15-18 mm so that the seam was in the center of the band. In order to ensure uniform application of the width of polymer composition 13 to grind materials 11 and 12, deformable porous (rubber) sleeve 4 rotating rollers provided with protuberances 18 (0.51.0 cm) on both sides. These protrusions 18 smoothly interfaced with the external cylindrical surface of the sleeve 4. In the process
Section 9. Technical sciences
of applying the polymer composite 13 due to the heterogeneity of grind materials 11 and 12, sleeve 4 copies these irregularities due to their deformation, and the deformation of elastic sleeves 3 rollers. When insufficient supply of polymeric material due to its
wettability and capillarity supply of polymeric material derived from the truncated conical holes 5 and sleeve 4. This ensures even application of the polymer coating 13 grind materials 11, 12 on both the strip width, and thickness of coatings 13.
Fig 1. Device for applying the polymer composition to the wetted parts of clothing
Applying the developed device for applying a polymeric coating composition provides a polymer composition to grind garment component layer with sufficient, which leads to reliability and durability of thread connections. To this end, it is important substantiation of system parameters on the basis of studying the dynamics
of the working sleeves (rollers) of the device. Figure 2 shows the kinematic scheme of the drive movement of the elastic clips. Movement ofthe rollers 2 is obtained from the engine (Fig. 2. not shown) via a drive shaft 7, a chain drive 9 and the shaft 3. Design scheme is shown in Figure 3.
Figure 2. The kinematic scheme of the drive rollers
The mathematical model of the dynamics of rollers motion according to the designscheme in Figure 3, taking into account the
Figure 3. Design scheme Where, I-extort mass of the work of the engine,
shaft and the drive sprocket; II- mass of the extort driven sprocket, shaft and bushing roller; III- mass of the outer sleeve scheme
mechanical characteristics of the engine, the elastic-dissipative properties of the chain drive and the elastic sleeve roller, as well as tech-
Method of calculating the kinematic parameters of steering gear ensuring a tractor minimum turning circle radius
nological resistance caused by the polymer material and grind materials. At the same time, we used the II — Lagrange equations [2]. Thus, we obtained the following system of differential equations:
Mg = 2Mkvc - 2Mip(j)l -acSkMg;
JA = Ms -B()-ci(;
Jik = B(A ) + c 1 (01- 02)-B (2 - k)-c2(2- fa); JA = 02 (^2 - 03 ) + C2 (02 - 03 ) - Mc ,
Where, Mg, Mk - the drive torque of the motor and its critical value; p - Number ofpole pairs; - Circular frequency ofthe network; Sk - Sliding and its critical value; 0P 02, 03 - the angular velocity of the motor, the intermediate shaft and the outer sleeve of the roller; Mc - Technological resistance of polymeric material; cj, c2, B1, B2 - Coefficients of stiffness and damping circular chain drive roller and an elastic sleeve.
The laws of motion of the roller at various initial settingshas been derived based onthe numerical solution of differential equations. The best parameter settings of the drive rollershas been determined.
References:
1. Veselov V. V., Gorbunov I. D., Molkova I. V. Apparatus for applying liquid-phase polymer on sections cut parts. Proceedings of the universities. The technology of the textile industry. - 2007, - No 3. - P. 97-99.
2. Djuraev A. and others. The theory of mechanisms and machines. Ed. "G. Gulyamov". - Tashkent, - 2004. - P. 594.
DOI: http://dx.doi.org/10.20534/ESR-16-11.12-131-134
Kambarov Bahtiyor Akbaralievich, candidate of technical sciences, Laboratory of power, transport and loading and unloading works, Scientific Research Institute of Mechanization and Electrification of Agriculture (SRIMEA), Republic of Uzbekistan, Yangiyul district,
E-mail: b-kambarov@rambler.ru
Method of calculating the kinematic parameters of steering gear ensuring a tractor minimum turning circle radius
Abstract: Calculating the parameters of a portal front axle and the steering gear of the perspective high-clearance cotton growing tractor 4K2 are specified in the article.
Keywords: a four-wheeled cotton growing tractor, front portal high-clearance axle of the steered wheels, the parameters of a front axle, steering linkage, setting angles of the steering gear, a turning angle of the front wheels, a minimum turning radius.
Turning the steering wheels of agricultural tractors in the course of working is performed by the driver by applying the steering control mechanism. If a turn must be sharper, then it is reasonable to use the right or left brake. In this case one of the driving wheels will be decelerated or blocked and then the rear axle differential starts functioning.
The tractor must be operated without much effort on the steering wheel, and for the purpose to maintain the desired track of the turning the guide wheels must move in pure rolling mode, that doesn't slide relative to the supporting face [1, 3-4]. In effort
to facilitate the tractors driving they are equipped with hydraulic amplifying appliances of a steering control and the steering gear parameters will be optimized.
In addition, the quality of tractor driving is ensured by setting the guide wheels at certain angles — the break-up, convergence and steering stubs of bracket supports bending.
Figure 1 shows the classical scheme of the wheel tractors rotation.
On the fig. 1, a a turning scheme of cotton growing tractor having one-wheeled frontal axle.
Fig. 1, b shows a scheme of tractor turning 4K2 (4K4).
а) b)
Figure 1.Turning scheme of wheel tractors 3K2 and 4K2 (4K4)
