SU837630A1

SU837630A1 - Broaching assembly

Info

Publication number: SU837630A1
Application number: SU792827602A
Authority: SU
Inventors: Борис Иванович Старинов
Original assignee: Горьковский Автомобильный Завод(Производственное Объединение "Газ")
Priority date: 1979-10-10
Filing date: 1979-10-10
Publication date: 1981-06-15

Description

1one

Изобретение относитс к металлообработке и может быть использовано при обработке поверхностей прот гиванием .The invention relates to metal working and can be used in surface treatment by pulling.

Известен прот жной блок, включающий прот жки с наклонным расположением зубьев, закрепленные на взаимно перпендикул рных поверхност х инструментальной плиты со смещением друг относительно друга, так, что последние зубь первой прот жки перекрывают начальные зубь последующей прот жки 1 .A known block includes protrusions with an inclined arrangement of teeth, mounted on mutually perpendicular surfaces of the tool plate with displacement relative to each other, so that the last teeth of the first broach overlap the initial teeth of the subsequent broach 1.

При таком исполнении низки стойкость прот жки, и качество обрабатываемой поверхности из-за резкого изменени сил резани .With this design, the durability of the draw is low, and the quality of the surface to be machined due to a sharp change in the cutting forces.

. Цель изобретени - повышение стойкости и качества обрабатываемой поверхности .. The purpose of the invention is to increase the durability and quality of the treated surface.

Поставленна цель достигаетс тем что начальные зубь последующей прот жки выполнены с фасками под острым углом к поверхности режущих зубьев со стороны, противоположной зубь м первой прот жки.The goal is achieved by the fact that the initial teeth of the subsequent stretch are chamfered at an acute angle to the surface of the cutting teeth from the side opposite the teeth of the first stretch.

Такое выполнение повышает стойкость прот жек и качество обрабатываемой поверхности.This embodiment improves the durability of the tip and the quality of the treated surface.

На фиг.1 изображен блок, общий вид; на фиг.2 вид Л на фиг.1.1 shows a block, a general view; in FIG. 2, a view L in FIG.

Прот жной блок состоит из инструментальной плиты 1,.на которой на взаимно перпендикул рных плоскост х расположены со смещением друг относительно друга перва прот жка 2 и последующа за ней прот жка 3, выполненна с зубь ми 4. Начальные зубь 4 последующей прот жки 3 выполнены с фасками 5 под острым углом V к поверхности зубьев 4 и расположены со стороны, противоположной зубь м 6 первой прот жки 2. Зубь первой прот жки 2 перекрывают начальные зубь последующей прот жки.The drawing block consists of a tool plate 1, on which, on mutually perpendicular planes, the first draw 2 and the next follow 3, arranged with teeth 4 are displaced relative to each other. The initial teeth 4 of the subsequent draw 3 are made with chamfers 5 at an acute angle V to the surface of the teeth 4 and are located on the side opposite to the tooth m 6 of the first broach 2. The tooth of the first broach 2 overlaps the initial teeth of the subsequent broach.

Прот жной блок работает следующим образом.The draw block operates as follows.

При резании прот жка 2 отталкивает заготовку, а заготовка соответственно , стремитс навстречу прот жкеWhen cutting, broach 2 pushes the workpiece, and the workpiece, respectively, tends towards the bevel

2.При выходе из зацеплени с прот жкой 2 сила резани резко не падает. ЭТОМУ преп тствует фаска 5 прот жки2. When exiting engagement with pulling 2, the cutting force does not drop sharply. This is hampered by 5 bevels

3,толкающа з-аготовку от прот жки 2, как бы выравнива (уравновешива ) составл ющие силы резани . Заготовка не перемещаетс на величину зазоров3, pushing the armature from the broach 2, as if aligning (balancing) the component cutting forces. The workpiece does not move by the amount of gaps.

Claims

in the AIDS system, thanks to the balancing chamfer 5. The overlap (displacement) of the first tooth 4 of the spacing 3 relative to the last tooth 6 of the spacing 2 along the tooth pitch length at the time of the incision of the spacing 3 also eliminates the oscillation of the workpiece with sharp changes in the cutting force. Making the balancing chamfer 5 at an angle of 45 ° provides an additional length of the cutting edge, contributing to the occurrence of an additional cutting force that prevents the workpiece from shifting from drawing

2. In addition, chamfering at an acute angle H ensures the emergence of additional forces in case the width of the workpiece is larger than the width of the

3. If the angle H: 45, i.e., there is a probability that when the width of the workpiece is less than the width of span 3, the effect of chamfer 5 can be reduced to zero. Those. chamfer 5 either will not participate in cutting or will not provide the necessary additional lateral cutting force that squeezes the workpiece from broach 2; 3, and since the workpiece becomes stationary, the quality of the surfaces to be machined also increases (undercuts and tears in the workpiece are eliminated). Claims of the Invention An extension block comprising stretches with an inclined arrangement of teeth fixed on mutually perpendicular surfaces of the tool plate with displacement relative to each other so that the last teeth of the previous stretch cover the initial teeth of the subsequent stretch that, in order to increase the durability of the grooves and the quality of the surface being processed, the initial teeth of the subsequent stretch are chamfered at an acute angle to the surface of the cutting teeth on the side opposite to kill me the first time. Sources of information taken into account during the examination 1. Katsev PG and others. Handbook of prozhnik. M., 1963, p.141, tab.68.