SU657885A1

SU657885A1 - Tool for multipassage extrusion of hollow profiles

Info

Publication number: SU657885A1
Application number: SU782564141A
Authority: SU
Inventors: Александр Михайлович Рытиков; Леонид Михайлович Грабарник; Александр Александрович Нагайцев; Павел Кузьмич Кузнецов
Original assignee: Государственный Научно-Исследовательский И Проектный Институт Сплавов И Обработки Цветных Металлов
Priority date: 1978-01-03
Filing date: 1978-01-03
Publication date: 1979-04-25

Description

II

Изобретение относитс к обработке металлов давлением методом экструдировани , в частности к прессовому инструменту.The invention relates to the processing of metals by extrusion by pressure, in particular to a pressing tool.

Известен инструмент дл многоканального экструдировани сплошных профилей, содержащий контейнер, матрицу, имею1цую очко с профильными пазами, и вход щую в канал иглу, образующую совместно с пазами профильные каналы l.A known tool for multichannel extrusion of solid profiles, comprising a container, a matrix, a point with shaped grooves, and a needle entering the channel, which together with the grooves form the profile channels l.

Недостатком зтого инструмента вл етс то, что при прессовании профилей мелкого сечени на полках профилей образуютс заусеницы вследствие затекаии металла в зазоры между сопр гающимис поверхност ми иглы и матрицы.The disadvantage of this tool is that when pressing the profiles of small sections on the shelves of the profiles, barbs are formed due to the flow of metal into the gaps between the mating surfaces of the needle and the die.

Целью изобретени вл етс повышение качества готовых профилей.The aim of the invention is to improve the quality of the finished profiles.

Это достигаетс тем, что на рабочем торце матрицы между профильными пазами выполнены радиальные выступы, поверхность которых, обращенна к игле, имеет насечку, при этом высота выступов равнаThis is achieved by the fact that at the working end of the matrix between the profile grooves there are radial protrusions, the surface of which, facing the needle, has a notch, while the height of the protrusions is equal to

il 0,e4i /-|-l3VtR-r-),il 0, e4i / - | -l3VtR-r-),

где Е- модуль Юнга материала матрицы; Р- удельное давление прессовани ; (Г- зазор между иглой и матрицей; И- радиус полости контейнера; г- радиус иглы; Ь- ширина выступа.where E is the Young's modulus of the matrix material; P is the specific pressing pressure; (G is the gap between the needle and the die; And is the radius of the container cavity; r is the radius of the needle; L is the width of the protrusion.

На фиг.1 ноказан предлагаемьш инструмент, продольный разрез; на фиг.2 - то же,вид сверхуIn Fig.1, the tool is shown nominally, longitudinal section; figure 2 - the same, top view

Инструмент содержит иглу 1 и матрицу 2 с выступами 3, на прилегающей к игле поверхности которых выполнена насечка 4. На матрице 2 выполнены профильные пазы 5, которые вместе с иглой 1 образуют профильные каналы.The tool contains a needle 1 and a matrix 2 with protrusions 3, on the surface adjacent to the needle of which a notch 4 is made. On the matrix 2 there are made profile grooves 5, which together with the needle 1 form profile channels.

Прессование осуществл ют следующим образом .The pressing is carried out as follows.

Claims

The blank 6 is put into the container 7, pressed out and stitched with the needle 1. In the process of pressing out, stitching and subsequent extrusion, the technological gaps between the sliding surfaces of the needle 1 and the die 2 are selected due to the elastic deformation of the protruding 3, pressing the pressed metal on them, while This notch 4 slows down the movement of the metal into the gap. In order to avoid pinching of the needle 1 in the matrix 2, the optimum height of the protrusion 3 is calculated based on the strength characteristics of the matrix material and the effort spent during extrusion, and is 1l: 0.84W- | -tVcR-r). Thus, the proposed tool allows extruding at the same time several profiles with obtaining high-quality, surface-free burrs. The invention The tool for multi-channel extrusion of solid profiles, containing a matrix container having a point with profile grooves and a needle entering the point, forming, together with the grooves, the working profile channel, tl and h .1

AAA, in order to improve the quality of the finished profiles, radial protrusions are made at the working end of the matrix between the profile grooves, the surface of which faces the needle has a notch, and the protrusion height is 4 / 84Wf -tV (Rr), where B is the Young's modulus of the matrix material; p is the specific pressure of pressing; (the gap between the matrix and the needle; the radius of the cavity of the container; g - the radius of the needle; Tz - width of the protrusion Sources of information taken into account in the examination 1. Muller E. Hydraulic presses for products from non-ferrous metals. Mashgiz, M., 1962, p. 163.