DD274995A1 - INSERTS hobs - Google Patents

Abstract

The invention relates to a cutting plate Waelzfraeser for processing gehaerteter and ungehaerteter serrations, which is characterized by a minimum number of technologically manageable elements. According to the invention, this is achieved by arranging, on an undivided worm-like basic body, cutting-board pockets opposite to the chip grooves incorporated in the adjacent worm-gear for receiving the cutting plates.

Description

embodiment

The invention will be explained in more detail with reference to an embodiment: It show

Fig. 1: Die hob, simplified process for A ₂ = HX ₁

Fig.2: Cutting hob, simplified processing for \ ₂ = - λ,

The Schneidplattenwälzfräser shown in the simplified processing consists of an undivided screw-shaped base body 1, in the worm gear inserts 2 at angles A ₁₁ X _{2 of} the cutting corners 8 are incorporated such that the free surfaces 4 of the left cutting plates 5 faces the open spaces 4 of the right cutting plates 6 are. In order to ensure the accessibility of the cutting board pockets for processing and a sufficient chip space, located between the two facing open spaces 4 helical gear is broken, said breakthrough simultaneously represents the flute 7 of the following cutting edge.

Claims (2)

1. Cutting plates _r hob for machining of gears, in particular Stimradverzahnungen, characterized in that on an undivided worm-shaped base body (1) in cutting plates pockets are arranged such that arranged between the arranged on each second helix and with their open spaces (4) left (5) and right-hand cutting edges (6) has a flute (7) in the form of the intervening flight. 2. cutting hob according to claim 1, characterized in that the imaginary rake surfaces (3) and the cutting corners (8) by the angle 360 ° + X ₂
A ₁ : withX ₂ = + - ^ - X ₁ for right-angle cutters and
withX ₂ = -ö-λ, for left-rising cutters, are arranged offset.
For this 2 pages drawings Field of application of the invention The invention relates to a cutting hob for machining hardened and uncured serrations. Characteristic of the known state of the art To produce spur gears hitherto preferably hobs are used in full steel or blade rail design, with knife rails are clamped or soldered. In DE 2700525, DE 3039076, DE 3128563 and WP B 23 F / 2981790 and WP B 23 F / 3008492 Schneidplattenwälzfräser are presented in which, however, the cutting plate carrier is composed of several individual parts and thus has disadvantages in terms of accuracy and vibration sensitivity. Object of the invention The aim of the invention consists in an increase in the quality of the cutting hob and in reducing its manufacturing costs and thus to increase the efficiency in the production of spur gears. Explanation of the essence of the invention The object of the invention is to develop a cutting hob hob, which is characterized by a minimum number of technologically manageable elements. According to the invention this is achieved in that cutting plates are arranged on an undivided worm-shaped body in cutting plate pockets such that between the arranged on each second helical gear and with their open spaces opposing left and right cutting a flute in the form of openwork intervening helix is, so that the cutting board pockets are accessible to machining. This will make the cutting corners around the helix angle λι, Aj according to X ₁ = ^^ (1, A ₂ = -ι A _{1 for the} sequence of clamping groove cutting flute opposite cutting edge (2a) A ₂ = A ₁ for the sequence chip flute-opposed blade (2b) arranged on the tool lateral surface offset, for which the largest possible tooth head thickness of the case (2 a) is the preferential solution for right-rising and the case (2b) for left-rising cutter.