Improvement Geometric Parameter Saws And Increasing His(Its) Capacity To Work

Currently, there is no scientific justification for improving the geometric parameters of the chain saw and the accuracy standards of functional parameters. The issue of improving the geometric parameters of the saw is important and, in this regard, requires urgent resolution. The article deals with issues related to changing the strength of the operating working surfaces of the teeth of a chain saw depending on the design. Keyword The worker surface, saw, stability, toughness, improvement, stringy mass, qualitative factors, vice formation, pat cleansing production, preparing products, wear capability.

Finding the probability of failure or failure -free operation at the product design stage is a very difficult task. Currently, the main method for evaluating strength reliability is to determine the strength reserves.
It is essential that the reliability and reliability of various structures, including the profile of the laser saw, is associated with the definition of the service life. In most cases, the service life refers to the time when the product is operating under load or load cycles [4]. New laser and Linter saws with a diameter of 320 mm have 280 and 330 teeth, respectively. Saws used in cotton mills that have teeth destruction in the form of abrasive wear, plastic crumpling and breakdowns are cut down to a smaller diameter in the saw repair shop.
The technical standard provides for 5-fold cutting of teeth ( Fig. 1) on saw disks with a decreasing diameter: 320, 300, 290, 280, 270 and 260 mm [8]. After working off saws with a diameter of 260 mm on linters, they are not subject to restoration (renovation) and are passed for scrap. The short inter-repair service life of saws (according to the technical regulations, chain and Linter saws are subject to replacement after 96 and 48 hours, respectively) requires frequent cutting operations for a smaller diameter, which increases their annual demand, which is more than one million pieces for the cotton gin industry of Uzbekistan.

III. MODEL SPECIFICATION AND PARAMETER ESTIMATION IN FIXED EFFECT MODEL
All paragraphs must be indented. All paragraphs must be justified, i.e. both left-justified and right-justified. Performance of gins and linters, their energy consumption, as well as quality of produced products (cotton fibre, lint, seeds) depend to a large extent on the efficiency of saw repair shops. Operations to prepare saw and saw cylinders in the saw repair shop of cotton plants include such activities as sorting, sharpening, cutting, rigging, sizing and grinding. In order to perform these operations, the saw repair shop must be equipped with tooth processing machines, saw points, machines for removing (grinding) chamfers from saw teeth [4]. It is necessary to have in sufficient quantity a cutting tool, a set of gauges and templates for quality control and saw geometry. The fixed effect estimator allows αi to differ across units by estimating different constants for each crosssection. Standard errors are obtained from a re-estimated model with no intercept. We note that estimating the cross-section specific constant regression model with a large number of cross-section units is time consuming, and may result in estimates that are less accurate than those obtained using the fixed-effects option.
The influence of the inclination of the front face of the teeth for any pitch values of the teeth has little effect and is evident to the extent that this inclination affects the degree of dismembering of the fiber strands being torn off the seeds. However, due to the complexity of the processing, it is impractical to apply an inclination of the front face of the teeth of more than 40 °, and an increase in the working space of the teeth significantly affects the quality and productivity of the gining. It follows from the above conclusions that the improvement of the profiles of the teeth of the gin saw in depth to study the force of the working part of the teeth acting in the process of operation and to justify the parameters, to recommend the optimal version of the profile of the gin saw. Levkovich V. A. in these works for the first time theoretically justified the process of jining on saw gins and solved a number of theoretical and practical issues related to genie saw and construction of rational tooth profile [4]. The main findings of the studies were as follows: 1) In order to increase productivity and improve quality, it is necessary to: Apply a straight-border tooth profile and a size corresponding to the Harvnietter gin tooth profile. From this point on, the question of tooth shape was theoretically and practically considered correct, i.e. a tooth with straight faces is considered the most rational (Fig. 3.). But further development of science and practice confirmed the insufficiency of Levnikovich 's conclusion B. A.
2) The saw tooth grabs, cuts off the seeds and pulls the fibers behind the grate, and this alignment of the saw tooth operation phase affects the performance-the more the capture fibers and breaks the saw tooth off the seeds per unit time, the higher the performance of the gin.
3) The theoretical number of fibers captured by one genie saw tooth is: On the basis of the above formula, the productivity is independent of the cotton grade and there is a function of tooth area, number of teeth and number of rotations of the saw roll (Fig. 4). Obviously, the value of the tooth cavity and the number of teeth per saw are linked to each other, it is necessary to find the optimal ratio of these values [5]. The tests carried out show that the best result of ginning by quantitative and qualitative indicators is obtained at the number of teeth in 280 per 12 saws. 4) Saw teeth are loaded with trapped fibers unevenly and not all of them participate in the work. 5) In order to better integrate the tooth with the cheese roll, which will contribute to an increase in fiber capture, and therefore productivity, the saw tooth needs to be made acutely. On the basis of this model (Figure 4), which opens a significant reserve in the possibility of filling the teeth cavities with fibre, it is possible to use saws with reduced pitch of teeth (at their number on a saw more than 280). The use of such saws provides sufficient productivity while significantly reducing the interaction forces, and hence improving fibre quality and reducing seed damage.
IV. CONCLUSION The version of this template is V5. Most of the formatting instructions in this document have been compiled by Causal Productions from the IEEE LaTeX style files. Causal Productions offers both A4 templates and US Letter templates for LaTeX and Microsoft Word. The LaTeX templates depend on the official IEEEtran.cls and IEEEtran.bst files, whereas the Microsoft Word templates are self-contained. Causal Productions has used its best efforts to ensure that the templates have the same appearance.
-In all the theoretical analyses carried out, in which the saws during bench tests showed increased gripping capacity, and on natural gins -marginal productivity, at the same time there was also a decrease in fibre quality. The high gripping capacity of the teeth and saw in general is accompanied by increased force on the processing product, which causes a decrease in fibre quality and damage to seeds.
-Saw with diluted teeth was characterized by the highest performance indicators, and from the point of view of fibre quality these saws showed the worst result. The work of such saws caused increased powder formation and, above all, defects such as fiber skin and mechanical damage to seeds.
-Saws with increased pitch of teeth, i.e. with reduced number (less than 280), as well as saws with diluted teeth, provided increased efficiency and reduced fibre quality. However, the decrease in fiber and seed quality was less noticeable.
-Saws with reduced pitch of teeth, i.e. with increased number (more than 280), provided efficiency of ginning process, meeting requirements of modern cotton cleaning production, with marked improvement of quality of produced fibre and seeds. This can be explained by the fact that the potential ability to capture tooth cavity fibers, even with small dimensions, is sufficiently high to provide a gingering with high productivity.