DE1931891A1 - Sawing process with superimposed oscillation movement for sawing hard materials - Google Patents

Description

Re: patent application: sawing with superimposed oscillating movement for sawing hard materials Patent description: The invention relates to a sawing method for sawing machines, especially for circular sawing machines, with superimposed oscillating movement, which acts in the direction of the feed movement or in the working plane perpendicular to it, for the purpose of faster sawing of glass, ceramics, stone and other hard materials.

The .rkstoffabtrag when sawing} starting material consists of plastering and splinters together, the splintering being more important than that Cracks. The ratio of the two parts is largely determined by the out-of-roundness of the The saw blade. The rounder the S-blade, the more material is removed by scoring, and the more out-of-round the saw blade, the more the splintering predominates as a result of the impulse introduced into the material by the saw blade, and the greater is the material removal. From the seed blade manufacturers so far but always aim for a saw blade that is as round as possible. One remaining in terms of manufacture Out-of-roundness, which cannot be completely avoided, is gradually reduced when sawing because the parts of the abrasive trim that protrude farthest in the radial direction, in particular wear out heavily, with the saw blade becoming more and more dull.

This rounding and thus blunting process also occurs when the saw blade intentionally between the spinning flanges or.

Eccentrically clamped by means of a ring clamping element (e.g. Spieth pressure sleeve) becomes, because then the wear is particularly strong at the point with the greatest radial Extension of the cutting trim begins. To restore cutting ability the saw blade would have to be tightened again by hand to a certain eccentricity, which is very time-consuming and for which complicated measuring devices are required.

The sawing processes used up to now also do not produce any impulsive effects Stress on the berkstoffess because the aim is always the feed movement as uniform as possible. This applies to both tangential sawing as well as for radial sawing, regardless of whether the feed movement is hydraulic, is generated mechanically or by means of weight.

While avoiding the aforementioned disadvantages of previously known saw blades, Saw blade clamping devices or sawing processes, a sawing process is now proposed, in which the necessary impulses of any strength and time are introduced into the material without the saw blade knocking off due to uniform wear or one-sided wears out and has to be reclamped.

Fig. 1 shows al to dl and a2 to d2 in principle r) representation some possibilities of introducing such impulses through oscillating movements. The generation of the latter can be hydraulic, mechanical, electromagnetic or take place pneumatically. The oscillation movement Uosz can either be from tool 1 respectively.

Tool slide 2 are executed and in any direction in the working plane, which contains the feed direction u and the cutting direction v, act, the direction in the feed movement u (Fig. la) or the perpendicular to this (Fig. Ib> preference should be given, or from the: Erk piece 3 or workpiece slide 4 are executed and again in any direction act in the working level, with the oscillation movement in the direction of the Feed movement (picture 1c) or perpendicular to this (picture ld) should be selected.

The path amplitude of the oscillation should be in the order of magnitude of the Feed rate per revolution and the oscillation frequency approximately that of the rotational frequency of the saw blade.

Claims (1)

Claim: Sawing processes for sawing machines, especially for circular sawing machines, for separating hard materials, characterized in that with the aid of known hydraulic, mechanical, electromagnetic or pneumatic devices of the feed motion, gunp, an oscillating movement acting in the working plane, preferably in the feed direction or perpendicular to this, is superimposed, the frequency of which is approximately the rotational frequency of the saw blade and the amplitude of which corresponds approximately to the speed per revolution.