Geometrical Errors of Surfaces Milled with Convex and Concave Profile Tools

Abstract

The geometrical interpretation of the transformation of cylindrical milling of products into profile milling by shaping cutters with a convex and concave cutting profile is considered. A mathematical model of geometric errors of profile surfaces processed with tools with the specified cutting profiles is developed. On the basis of the model and the results of its analysis, scientifically based recommendations for designing a technological operation for profile milling of products have been developed. When processing a product with a contoured cutter with a concave profile, it is recommended to calculate the geometric errors formed in the transverse plane of the shaping cutter, and when machining with a shaping cutter with a convex cutting profile - in the planes of both its ends. The calculated values of the above geometric errors should be compared with the values limited by the work drawing of the product. The implementation of these recommendations will reduce the labor costs for experimental research and control operations associated with ensuring a given geometric accuracy of products.

Processing of Used Wooden Slippers by Thermal Method

“…After, the release of the liquid product decreases sharply until the end of the measurement (5 seconds). According to Mettler et al [14,15] with a longer hold-up time of steam and gases in the pyrolysis chamber, the number of secondary reactions increases, as a result of which the production of gases, coal increases and the yield of liquid thermal decomposition products decreases [16,17] (refer with: Fig. 3).…”

Analysis of operation features of sizing screen with parametric excitation

“…Free screen sizing is amply discussed [9][10][11][12][13][14][15], while the behavior of difficult-to-sift particles on a sifting surface with parametric excitation remains yet poorly studied.…”

The Processing of the Profile Surface of the Work-Pieces, Characterized by Low Rigidity

“…Increased dynamic activity of the technological system adversely affects the quality of the processed surface and the performance of the process [8][9][10][11][12]. The acute problem of processing products of low rigidity is in mechanical engineering, in particular, aircraft industry, woodworking, processing of other materials [13][14][15][16][17][18][19]. The above mentioned fully applies to woodworking, in particular, to the milling of the profile surfaces of the peripheral segments resulting from the cutting of logs [20][21][22][23][24].…”