SU905086A1

SU905086A1 - Cutting blade for spiral-cutting machine

Info

Publication number: SU905086A1
Application number: SU802983547A
Authority: SU
Inventors: Алексей Григорьевич Лахтанов; Николай Васильевич Бурносов; Анатолий Михайлович Дроздов; Лариса Михайловна Козел
Original assignee: Белорусский технологический институт им.С.М.Кирова
Priority date: 1980-09-10
Filing date: 1980-09-10
Publication date: 1982-02-15

Description

(54) РЕЖУЩИЙ НОЖ ДЛЯ СПИРАЛЬНЫХ РУБИТЕЛЬНЫХ МАШИН(54) CUTTING KNIFE FOR SPIRAL CUTTING MACHINES

II

Изобретение относитс к инструментам дл переработки круглых лесоматериалов на брус и технологическую щепу на фрезерно-брусуюш ,их .машинах со спиральными ножевыми дисками торцового фрезеровани и может быть использовано в лесной и деревообрабатывающей промышленности .The invention relates to tools for processing roundwood for timber and processing chips on milling-cant machines, their machines with spiral blade discs for face milling and can be used in the timber and woodworking industry.

Известен режущий нож дл спиральных рубительных машин, включающий пластину с верхней и боковыми плоскост ми, имеющую длинную и короткую режущие кромки , которые выполнены вогнутыми 1.A cutting knife for spiral chippers is known, including a plate with upper and side planes, having long and short cutting edges which are made concave 1.

Известен также режупдий нож дл спиральных pyбиteльныx машин, выполненный в виде пластины с левосторонними и правосторонними длинными и короткими режущими кромками 2.Also known is rezupdiy knife for spiral pybiteleh machines, made in the form of a plate with left-sided and right-sided long and short cutting edges 2.

Недостатком известных ножей вл етс то, что они креп тс на колонке, котора находитс в зоне схода щепы, расположенной-под длинной режущей кромкой на рассто нии от короткой режущей кромки, при- мерно равном длине щепы. В св зи с этим имеет место дробление щепы, сопровождающеес снижением ее качества и эффективности дальнейшего использовани .A disadvantage of the known knives is that they are fastened on a column which is in the area of the chip gathering located under the long cutting edge at a distance from the short cutting edge approximately equal to the length of the chip. In connection with this, crushing of chips occurs, which is accompanied by a decrease in its quality and efficiency of its further use.

Крепление ножей к колонке выполнено с помощью крепежных элементов, например болтов. Головка болта при этом должна лежать ниже плоскости резани длинной режущей кромки, что осуществл етс при «потайном , ее размещении относительно задней грани при длинной режущей кромке ножа . Это св зано со значительным ослабление .м ножа в месте его креплени . Дл 10 достижени необходимой прочности ножа при этом следует увеличивать его толщину или ширину, а следовательно, и материалое .мкость. Количество переточек ножа, ограничено соотнощени ми длины ножа и размеров колонки.The knives are fastened to the column using fasteners, such as bolts. In this case, the head of the bolt should lie below the cutting plane of the long cutting edge, which is carried out with the "secret, its location relative to the rear face with the long cutting edge of the knife. This is associated with a significant weakening of the knife at the point of its attachment. In order to achieve the required strength of the knife, it is necessary to increase its thickness or width and, consequently, the material. The number of knife spills is limited by the ratio of the length of the knife and the size of the column.

Цель изобретени - повышение качества щепы и долговечности ножа.The purpose of the invention is to improve the quality of the chips and the durability of the knife.

Указанна цель достигаетс тем, что пластины выполнены V-образной формы с углом 20-60° между одной из задних гра2Q ней и продолжением другой.This goal is achieved by the fact that the plates are V-shaped with an angle of 20-60 ° between one of the rear edges and the continuation of the other.

Claims

One part of the knife, the long cutting edge of which lies in the plane of the cutting — the cutting, the other, the long edge of which is bent away from the cutting plane toward the carrier disk, is used to attach the knife to the column, i.e. fastening. Due to the magnitude of the angle in the range of 2060 ° between the planes of the rear edges, it is possible to place fasteners, such as bolt heads, below the cutting plane without the use of a "flush joint." The column is located under the mounting part of the knife and does not prevent the descent of chips. At the same time, the number of knife regrindings is not limited by the size of the column and the knife, but only by the strength properties of the knife, which, given the previous dimensions of the knife, leads to an increase in its durability. FIG. 1 shows a knife, a general view; in fig. 2 - a variant of fastening the knife; in fig. 3 - scheme of the knife. The cutting knife 1 consists of a plate with long cutting edges 2, short cutting edges 3, front 4 and rear 5 faces with long cutting edges 2, front 6 and rear 7 faces with short cutting edges, as well as clamping surfaces 8, for example, fastening holes 9. Rear faces 5 are located in planes lying at an angle of 20-60 ° to each other. To install the knife 1, there is a column 10 having an oblique cut 11 and, for example, a bolt 12 mounted on the carrier disk 13. The cutting knife 1 mounted on the column 10 and fixed, for example by a bolt 12, when cutting the carrier disk 13, performs cutting 2 and 3, the chips being cut are retracted along the front face 4 and 6 B of the zone located between the knife 1 and the carrier disk 13 (under the long cutting edge 2 of the knife 1). Ko9 2 Lonka 10, located under the non-cutting part of the knife 1, lies away from the zone of gathering chips. The chips are evacuated from the cutting zone to the periphery of the carrier disk 13 and further to the chip receiver due to the centrifugal forces of inertia and the ventilation effect, i.e., they are unimpededly removed from the cutting zone, which contributes to its quality. The effectiveness of the proposed device is achieved by improving the quality and useful output of chips by ensuring that it is evacuated without impact from the cutting area on the front edges of the knife, the rear edges with long cutting edges are angled to each other, and the fastening elements are removed from the chip area. Increasing the durability of the knife is achieved by providing a larger allowable number of reflux compared with the known 50-100%. Claims for spiral chippers, made in the form of a plate with left and right long and short cutting edges, characterized in that, in order to improve the quality of chips and the durability of the knife, the plate is made V-shaped with an angle of 20-60 ° between one of the rear faces and the continuation of the other. Sources of information taken into account during the examination 1. USSR author's certificate No. 618285, cl. In 27 L 11/02, 1977.

2. USSR author's certificate number 454308, cl. In 27 L 11/02, 1973.

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