Cutting by use of rotating axially moving tool – Processes – Bit detachable
Patent
1996-06-12
1998-02-10
Pitts, Andrea L.
Cutting by use of rotating axially moving tool
Processes
Bit detachable
408 13, 408 16, B23B 4900
Patent
active
057161690
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a process for adjusting the diameter of reamers and similar cutting tools, in which the reamer is clamped in a toolholder mounted on a coordinate slide, and is measured using a camera-equipped measurement means which can be traversed with a measurement slide with respect to the diameter brought into the focal plane between the cutting edge and the opposite guide line of the shaft as well as the tilt of the cutting edge, by the individual measuring points being acquired by the camera, the traverse paths of the measurement slide between the measurement points being determined, and the cutting blade being adjusted according to the measurement result.
The invention moreover relates to a device for executing this process.
BACKGROUND OF THE INVENTION
In metal cutting, to produce precision holes with close production tolerances, special cutting tools, especially so-called reamers, are used, with a cutting blade which is attached to the shaft to be interchangeable and adjustable. These cutting blades must be adjusted to a stipulated diameter after changing and before each new use. Usually the cutting blades are also tilted slightly radially to the inside against the feed direction to prevent material accumulation at the cutting inlet. The cutting blades are adjusted using set screws provided on the tool shaft or the like, and there is at least one locking screw for fixing the cutting blade in position.
Various mechanical measurement means are known which can be used to acquire the effective diameter of reamers and the aforementioned angle of tilt of the cutting blade with high precision using probes and dial gauges. However, mechanical measurement has the disadvantage that the sensitive cutting blade can be damaged by mechanical contact. On the other hand, handling of mechanical probes and dial gauges is extraordinarily difficult and time-consuming due to the three-dimensional closeness which usually prevails. Likewise, retrofitting onto other tool sizes is very time consuming.
Another known process for adjustment of cutting tools on which this invention is based uses a means with two coordinate slides on which on the one hand the tool and on the other a camera are mounted. By moving the slides, the plane of the diameter which is determined by the cutting edge of the tool is moved into the focal plane of the camera. At this point, in succession, the cutting edge on the one hand and the guide line which is opposite on the shaft are brought on a monitor which is joined to the camera into a stipulated reference position to the camera and the traverse path between the cutting edge and the guide line is ascertained via precise scales. This traverse path corresponds to the effective diameter of the cutting tool. The adjustment process can also be followed on the monitor until the desired size is reached. The disadvantage of this solution is that only one measurement point at a time can be acquired with the camera and the next measurement point requires that the coordinate or measurement slide be traversed each time, so that under certain circumstances it is necessary to move back and forth several times until both the desired diameter as well as the desired angle of tilt of the cutting edge is reached. Due to the necessity of repeatedly moving back and forth not only is time consumption for the adjustment process relatively high, but inaccuracies can also occur.
SUMMARY OF THE INVENTION
The object of the present invention is to develop the generic process and a generic measurement means equipped with a camera and a monitor for executing the process such that the measurement process can be implemented relatively easily with high precision.
This object is achieved according to the invention by a process of the aforementioned type which is characterized in that first the guide line of the reamer opposite the cutting edge is acquired with the camera and is fixed as the reference position (position II).The measurement slide which holds the camera is moved until the posit
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Gildemeister-Devlieg System-Werkzeuge GmbH
Pitts Andrea L.
Tsai Henry W. H.
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