SU931449A1

SU931449A1 - Tab abrasive tool

Info

Publication number: SU931449A1
Application number: SU803004759A
Authority: SU
Inventors: Виктор Петрович Усов; Геннадий Алексеевич Кулаков
Original assignee: Куйбышевский политехнический институт им.В.В.Куйбышева; Сызранский Филиал Куйбышевского Политехнического Института Им.В.В.Куйбышева
Priority date: 1980-11-14
Filing date: 1980-11-14
Publication date: 1982-05-30

Description

ii

Изобретение относитс к изготовлению инструмента дл шлифовани и полировани , например дл обработки деталей фасонной формы.The invention relates to the manufacture of a tool for grinding and polishing, for example for machining shaped parts.

Известен абразивный лепестковый инструмент, у которого абразивные лепестки выполнены многогранной формы и: установлены на оправку со смещением относительно друг друга по окружности CllОднако известный инструмент не предусмотрен дл совмещени двух операций: полировани и шлифовани , а следовательно, ограничиваютс технологические возможности инструмента .The abrasive petal tool is known, in which the abrasive petals are made of a multifaceted shape and are mounted on a mandrel offset relative to each other around the circumference of the Cll. However, a known tool is not provided for combining two operations: polishing and grinding, and therefore the technological capabilities of the tool are limited.

Цель изобретени - расширение технологических возможностей лепесткового инструмента за счет совмещени двух технологических операций шлифовани и полировани за один проход , а следовательно, и повышение производительности обработки.The purpose of the invention is to expand the technological capabilities of the petal tool by combining two technological operations of grinding and polishing in a single pass, and consequently, an increase in processing productivity.

Поставленна цель достигаетс .тем, что абразивные лепестки многогранной формы выполнены переменной площади и установлены на оправке с образованием усеченной пирамиды, причем зернистость абразивных лепестков увеличиваетс в направлении от основани пирамиды к ее вершине.The goal is achieved. The fact that the abrasive petals of a multifaceted shape are made of variable area and mounted on a mandrel with the formation of a truncated pyramid, with the grit of the abrasive petals increasing in the direction from the base of the pyramid to its top.

Кроме того,угловое смещение граней лепестков и количество абразив10 ных лепестков, одинаковой зернистости выбирают из соотношени In addition, the angular displacement of the faces of the petals and the number of abrasive petals of the same grain size are chosen from the ratio

п lJi/Z p lJi / Z

где Ч угловое смещение граней where is the angular displacement of the faces

15 лепестков-,15 petals-,

h количество абразивных лепестков одинаковой зернистости;h the number of abrasive petals of the same grain;

1 - количество граней лепестМ ка.1 - the number of faces of the petal ka.

Claims

FIG. 1 shows the instrument, the overall appearance; in fig. 2 - processing scheme. The tool for grinding and polishing contains flanges 1, between which are attached the elastic abrasive elements 2, made of a multifaceted, for example square, shape. Abrasive petals have different grains, and sizes, with the maximum grain sizes corresponding to the maximum dimensions of the elements. The vertices of the 3 faces of the petals are shifted by an angle H; the assembled instrument represents a pyramid-shaped packet with a slope angle d. which is calculated by the formula d - drc4 f - Pitmin) PmCTTViri) afctc {variable radius vector of elements of a granular form; the total number of petals is, the total thickness of the petals in the collection. The graininess of the elements varies discretely, the number of petals with the same graininess and the angular displacement of the faces of the petals are related by the relation n-IJ / Z, the angular displacement of the faces of the petals; the number of abrasive lepeks of the same grit number of petal faces Due to the angular displacement, the tool has a kind of second, passing through the vertices of the minimum radius vector of the first element and the maximum radius vector of the last element. The angle of this generatrix is determined by the expression -HTYHTI) PTO (max; The tool works as follows. A tool made of abrasive petals 2 (of abrasive cloth) assembled in a package and fixed with flanges 1 is installed in the machine spindle and oriented at an angle dri to the surface to be machined. In this position, the force closes the tool with the part. The force closure is determined by the magnitude of the radial tension calculated by the formula Pi (mct rfitnninJ) The tool is reported to rotate and axially feed The part being worked out is counter-rotation. Due to the radial approach of the tool by the value of Г and the multifaceted shape of the petals 2, the latter are deformed by their vertices 3 in the opposite direction of the feed. Due to the difference in the sizes of elements and the installation of the tool by the angle c 1 2 increasing the size of elements that have a minimum graininess. Thus, the elements of minimum dimensions and maximum graininess, have greater rigidity, carry out the maximum metal removal and, while the latter elements is produced Referring m polishing due to maximum speed, minimum stiffness and graininess. The proposed tool will allow combining and replacing separate grinding and polishing operations, which will give an opportunity to increase the productivity of the process up to 20% while achieving the required quality of the surface being treated. Claim 1. Petal abrasive tool, made in the form of 5 abrasive petals of multifaceted shape fixed on a mandrel between flanges, displaced relative to each other in the circumferential direction, distinguished by the fact that | In order to expand technological capabilities by combining grinding and polishing operations, the petals are made variable area and mounted on a mandrel to form a truncated pyramid, with the grit of the abrasive petals increasing in the direction from the base of the pyramid to its the top.

2. The tool according to claim 1, characterized in that the number of abrasive petals of the same