DEVELOPMENT OF DEVICE FOR FIXING DISK DRILL BOOT IN A LATHE WHEN HARDENING

Abstract

Drop of operating costs for maintenance in operating state of the equipment is possible by rational restoration and hardening of details of farm vehicles, on the basis of development of the original industrial equipment, for example, for disk working bodies. The critical review of devices for fixation of details of various forms and appointment is executed. Their main shortcoming - impossibility of strong fixing in the lathe and fixations of details like "disk" with accuracy guarantee is revealed at their processing and also complexity of design of devices that affects labor input of performance of work. For the purpose of elimination of shortcomings, adaptation on mode of fixing of disk of soshnik in the lathe when hardening by means of the left and right mandrels is developed. The design has the following sizes: outer diameter of mandrels - 45 mm, threaded connection -M16, the size of "turnkey" hexagonal face nuts - 24, the total length of adaptation assembled - 258 mm, the right mandrel has length of 50 mm, the left mandrel supplied with the pressing face surface - with a diameter of 60 mm. Common effort of tightening of threaded connection - 200 N. At the same time the minimum safety factor on fatigue strength of design is equal to 16; equivalent normal tension in body of adaptation does not exceed 3.5 MPa; safety factor on fatigue strength of disk is equal to 2.637; conveyance of working edge of disk makes 1.034 mm. Analytical calculation in the automated workplace program complex APM Win Machine has confirmed that when processing disk strength and ruggedness of design of adaptation are assembled provided. Approbation of installation of adaptation on the lathe with imitation of processing has confirmed operability of technical solution.