DE2747720A1 - PROCESS FOR ANGLE AND DIMENSIONAL SHORTENING OF LONGITUDINAL WORKPIECES WITH CUTTING GAP EXTENSION - Google Patents

Abstract

In order to ensure right-angled cutting accuracy during all cuts when shortening parallel workpieces with a varying number of cuts on the same saw, it is proposed that, at the workpiece (6) already provided with a cut and waiting for the other workpieces (7), the cutting gap be opened so wide by advancing this workpiece (6) in the feed direction (arrow) by a few millimetres, and by immediately afterwards pulling back the end part of this workpiece (6) again in the opposite direction to the feed direction, that contact between the two cut edges of this workpiece (6) cannot take place during the subsequent passes of the sawing tool. <IMAGE>

Description

Process for shortening lengthways and angles with precise

shaped workpieces with kerf widening.

The invention relates to a method for precise angle and dimensional accuracy Depositing of, in particular, longitudinal workpieces. For reasons of capacity and economy several workpieces are moved in the feed direction, at right angles to the cutting line, arranged side by side. The number of cuts between the individual workpieces is usually different.

The shortening (cutting to length) of longitudinally shaped cheek pieces into long ones Formats is done in abbreviation machines.

(preferably circular saws).

Such machines have a right angle to the cutting direction of the saw line, arranged an angle stop. Move parallel to this angle stop 2 or more motor-driven slides, each with its own measuring device for the exact determination of the required length cuts, programmable.

The workpieces are parallel to the angle stop in the longitudinal direction applied to the machine table while the slide is in the rearmost Starting position. After a start signal, the slides push the workpieces according to a cutting program previously entered for each slide in the for each Workpiece specific position.

This process is known and results in a different number of cuts of the individual workpieces no dimensional accuracy of the individual blanks c.

The number of cuts in the individual workpieces is usually different, so it is necessary to achieve right-angled cutting accuracy, To stop workpieces at the penultimate cut until the other workpieces also reached the penultimate cutting position. The tool then runs past the cutting edges of the stopped workpiece several times, with the result, that the blanks of this workpiece receive very different dimensional tolerances and, moreover, there is no longer any absolute angular accuracy.

The invention is based on the object of the cutting gap in the to enlarge the stopped workpiece so that the tool touches the cutting edges of this Cannot touch workpieces.

To achieve this, the slides are fitted with a clamping device equipped, which the workpiece to be sawn with Gegem @@@@@ over non-positive and form-fitting associate.

When the position of the penultimate cut is reached on a workpiece and this workpiece to carry out the other cuts in the other workpieces has to be stopped, another cut is made after the workpiece has been severed Advance by a few millimeters, this results in the already separated part of the workpiece away from the cutting line in the feed direction.

Then this slide pulls the remaining part of the workpiece back behind the cutting line in the opposite direction to Ji, so that also result in a distance of several millimeters from the cutting line.

The kerf is a few millimeters on both sides extended and the saw blade can cut the edges of the workpiece that has already been sawn no longer touch and thus the cutting and angular accuracy is not detrimental affect.

With this method it is possible to find the desired, absolute and optimal To achieve cutting accuracy without the necessary mechanical equipment become significantly more expensive.

To achieve this goal is only the installation of simple clamping devices necessary as well as a change in the switching processes within the cycle sequence.

An exemplary embodiment of this method is shown in FIG. (1).

The saw (1) with the one arranged at right angles to the cutting line (3) Angle stop (2). The slides move parallel to the angle stop (2) (4 + 5). The workpiece (6) is in the penultimate cutting position, the The cut has been made and the kerf is already open. The workpiece (7) is positioned for the next cut. There must be one more number here be performed by cuts.

As soon as the penultimate cut has also been made here, both slides move together into the last cutting position.

L e r s e i t e

Claims (1)

P a t e n t a n s p r ü c h e process for angle and dimensional accuracy Abbreviation of elongated workpieces with kerf extension p, characterized by: that when cutting several workpieces next to each other with different numbers of cuts, with the work rope waiting for the other workpieces, the kerf through Advance this workpiece by a few after the cut has been made in the feed direction Millimeters and then immediately retract this workpiece by a few Millimeter opposite to the forward direction is opened so far that touching the workpiece edge of this workpiece when it later passes through the sawing tool cannot be done.