SU944895A1 - Method of working flat surfaces by combination tool - Google Patents

Description

one

The invention relates to the cold treatment of metals by the method of cutting and surface plastic deformation and can be used for the finishing treatment of the flat surfaces of parts.

The known method for the combined treatment of planes by cutting and surface plastic deformation, in which the cutting and deforming elements are installed in series 1.

In this method, the processing is carried out as follows.

First, cutting elements come into operation, and then deforming elements, and from that moment on, both cutting and deforming elements are in the treatment area. At the moment the deforming elements come into operation, the total forces (from cutting and deforming forces) on the AIDS system significantly increase, which leads to the pressing of the incisors and the formation of a step on the surface. With further movement of the tool, the deforming elements run onto. step, causing a new increase in the total effort acting on the AIDS system, and the formation of a new step of lesser height, and so on. Thus, the surface treated with the combined tool represents a number of decreasing steps.

The purpose of the invention is to improve the accuracy and quality of the machined surface when machining planes with a combination tool.

The goal is achieved by the fact that the deforming elements are shifted by an angle in the direction of rotation of the tool with respect to

10 to the cutting elements, the width of the surface being treated being chosen from the condition of alternate surface treatment with cutting and deforming elements, and the angle between the cutting and deforming element is determined by

15 formula

AT

AT

oC arcsin

arcsm-,

Dpiiji ds

20

Claims (2)

where B is the width of the treated surface; Dp is the diameter on which the tips of the cutting elements are located; Od is the diameter on which the geometric centers of the instrument farthest from the axis of rotation of the tool are located. ditch FIG. 1 shows the design of a combined tool for machining planes that implements this method; in fig. 2 is a view A of FIG. one; in fig. 3–5 are diagrams illustrating the sequence of processing a flat surface with a combined tool in this method. A combined tool, comprising a housing 1 with cutters 2 and a knurled head 3 with deforming balls 4, is installed in the pin of the milling machine (Fig. 1). The deforming bows 4 are placed in sections in the knurled head and offset relative to the cutting elements by an angle A (Fig. 2). The spindle with the tool is reported to rotate, with the cutters with deforming balls moving in circular trajectories with a center on the spindle axis. When the feed movement is turned on, cutting elements enter into the work and process the surface with chip removal. After moving the parts and in the direction of supply by the value - the deforming shchars enter the work and from this moment the cutting and deforming balls process the flat surface sequentially (Fig. 3-5). The cutting element 2 processes the surface with chip removal and leaves the treatment zone (Fig. 3). With the release of the element on the surface treated with incisors, the deforming balls 4 successively rush in, making plastic deformation of the treated surface (Fig. 4). When the last ball leaves the contact with the surface being rolled, cutter 2 enters the work (Fig. 5), etc. The use of the proposed method of machining planes with a combined tool has the following advantages as compared with the known methods: the machining accuracy increases (because the surface does not form steps); the quality of the treated surface is improved due to the constant force of deformation along the length. Claim 1. Method of processing flat surfaces with a combined tool containing sequentially located cutting and deforming elements, characterized in that, in order to increase the accuracy and quality of the processed surface, deforming elements are shifted by angle in the direction of rotation of the tool with respect to cutting elements, and the width The surface to be treated is selected from the condition of alternate surface treatment with cutting and deforming elements. 2. A method according to claim 1, characterized in that the angle between the deforming elements and the cutting elements is determined by the formula arc sin, where B is the width of the surface to be treated; Dp is the diameter on which the tips of the cutting elements are located; Bd is the diameter at which the geometric centers of the deforming balls farthest from the axis of rotation of the tool are located. Sources of information taken into account in the examination 1. P. Chistoserdov. Combined tools for finishing and hardening processing. Minsk. “Belarus, 1977, p. 98 101, fig. 45-48.