DD285568A5 - EXTRACTOR ON DIAMOND GRANULAR BASE - Google Patents

Abstract

The invention relates to a Umfangsfraeser based on diamond granules and is used in stone processing for the production of flat surfaces or contours. In accordance with the aim of developing a circumference milling machine that reduces the consumption of diamond with reduced energy consumption and production time, and the task of reducing the cutting forces, the circumference cutter is designed so that the diamond-containing cutting segments with their longitudinal axis are in a single or multiple pitch Helical line are arranged around the roller-shaped basic body {diamond tools; Umfangfraeser; Stone processing; Schnittkraefte}

Description

2855 * 8

Title of the invention

Scaling cutter based on diamond granules

Field of application of the invention

The invention relates to a milling tool for producing flat surfaces of brittle materials, such. B. tiles made of natural and artificial stone.

Characteristic of the known state of the art

Perimeter cutters based on diamond granules usually consist of a shaft with mounted segment carriers which are each equipped with several segments whose longitudinal axis lies in the circumferential direction.

In this case, the position of the segments relative to the respective adjacent offset, so that a helical arrangement is formed. This z. B. in hard rock at 0.5 mm reduction and 25 kW drive power Zeitspanflächen of 300 to 450 cm ^z / min achieved. Compared with earlier milling machines, whose segments were arranged parallel to the axis of rotation on the lateral surface of the wheel-shaped or roller-shaped base body, such tools have advantages with regard to cooling and running smoothness. As significant disadvantages remain a strong, but especially uneven wear of the cutting segments by scoring as a result of not sufficiently discharged by rinsing sanding dust, large cutting forces with the risk of destroying thin-walled workpieces and lack hinslichtlich the flatness and the degree of smoothness of the machined surfaces.

In DE OS 3011 337 a machine is described, which allows very smooth surfaces with low tool wear by an oscillating longitudinal feed with simultaneous cross feed with a conventional tool. The way is very expensive.

5568

In DD 259 814 the diamond segments are conventionally arranged. Special arrangement ratios provide advantages in terms of surface roughness and macro-waviness.

In DE OS 29 22 744 a peripheral cutter is presented, which achieves better surface qualities by modifying the segment arrangement compared to the usual mounted peripheral cutters. Due to the high proportion of tzeugkflachen in engagement but high cutting forces and a complicated system of cooling and SpUhIflUssigkeitsbohrungen or channels are required, so that the possible tool width remains limited.

Object of the invention

The object of the invention is to develop a peripheral milling cutter which substantially reduces diamond consumption while reducing energy consumption and saving production time.

Explanation of the essence of the invention

The invention has for its object to make the peripheral cutter so that the acting cutting forces are reduced. According to the invention, the object is achieved in that the diamond-containing cutting segments are arranged with its longitudinal axis in a single or multiple-course helical line about the cylindrical base body.

When arranged in a multi-start helix, the pitch of the individual gears may be equal or opposite. This arrangement according to the invention of the diamond-containing cutting segments has the consequence that only a small tool surface is engaged. This reduces overall cutting forces. The inventive arrangement of the diamond-containing cutting segments and the resulting quietness of the tool is a subsequent surface treatment in terms of flatness and smoothness of the workpiece is not required.

When working with eingangigen diamond rollers arise rough and non-slip surfaces, as used for backs of tiles u. Ä. Are required.

When oppositely fitted diamond rolls of the same pitch are produced surfaces with very low roughness. With regard to cooling and scavenging, the tool according to the invention functions like a screw conveyor. The liquid entering the cutting area is free of abrasive grease.

exemplary

The device according to the invention will be explained in more detail with reference to 1 embodiments.

1. A 220 mm diameter, 200 mm long, roller-shaped base was brazed hard with diamond tool segments in the form of a single-thread helix with 40 mm pitch, turning to the right.

On a milling machine with 4 kW drive power at a speed of 940 min and * a feed speed of 0.3 m / min, this tool thinned a 10 mm thick dolerite plate in one cut to 4 mm.

The plate had no pits. The surface finish corresponded to the quality roughly ground.

2. A 140 mm long, 220 mm diameter, roller-shaped base was brazed hard with diamond tool segments in the form of a two-flight, counter-rotating helix with 40 mm pitch on both sides.

With this tool, a curved surface was ground in a cut on a contour grinding machine with 14 kW drive power at a speed of 1480 min and a feed rate of 1 m / min and a feed depth of 10 mm

 The surface finish was fine-grained.

Claims (2)

285548 claim , Circumferential milling cutter on a diamond granule base with a helical segment arrangement, characterized in that the diamanthaitigen segments are arranged with its longitudinal axis in a single or multiple-speed helix without lines around the cylindrical base body. 2. Scoring according to claim 1, characterized in that in a multi-start helix, the increase of the individual gears is arranged in the same direction or in opposite directions.