DD250885A1 - DEVICE FOR MEASURING CUTTING GEOMETRIC GEOMETRICALLY CUTTING CLIPS - Google Patents

Abstract

Device for cutting wear measurement of geometrically determined cutting edges of cutting tools, in particular for use on automated machines. The invention aims to reduce the cost of the Geraetetechnik and high reliability. The reduction of the technical equipment expense is based on the use of an optical sensor, the main component of which is a photodiode or phototransistor matrix and an adjoining transducer with corresponding evaluation and display electronics.

Description

For this 1 page drawing

Field of application of the invention

The invention can be applied to the wear control of geometrically determined cutting edges of cutting tools, in particular when used on automated machine tools.

Characteristic of the known technical solutions

Known is the use of a CCD line scan camera with associated transmitter in the form of a microcomputer for the control of cutting wear or cutting edge. The basic principle of the CCD line test is based on the different reflection of the incident on the wear surface or free surface light.

A light throwing system and the CCD line scan camera are arranged to the tool so that the light reflected from the cutting edge (unworn) or wear surface is projected onto the CCD line.

Defined angle ratios are a prerequisite, and the optical axis of the light-throwing system CCD line must be perpendicular to the wear surface. Light that is reflected by the free or rake face, due to the changed angular conditions relative to the wear surface on the CCD line over. The number of illuminated dots of the CCD line is a measure of the wear.

Disadvantages of this method are the high level of equipment complexity and the high costs for CCD camera and evaluation electronics. In addition, slight deviations in the angle as well as contamination of the cutting edge result in changed reflection values and thus an inaccurate picture of the wear.

Object of the invention

The aim of the invention is to develop a cost-effective and reliable device for cutting wear measurement.

Explanation of the essence of the invention

The invention has for its object to reduce the equipment expense for the determination of cutting wear and reduce the measurement uncertainties by the design of the measuring arrangement.

The object is achieved in that arranged in front of a reflector light source at a fixed distance to an optical sensor, consisting of a magnifying optics and a behind it in the beam path Fotodioden- or Fototransistormatrix is arranged, wherein the Fotodioden- or Fototransistormatrix via a Transducer, an amplifier, an analog-to-digital converter is connected to a display unit.

The cutting edge to be tested is introduced in a defined manner between the system light source reflector and the optical sensor and, depending on the degree of wear, a more or less large shadow is produced on the matrix, which is converted into an electrical signal and displayed.

embodiment

Reference to an embodiment shown in the drawing, the invention will be explained in more detail.

Between a light source 2 arranged in front of a reflector 1 and at a fixed distance and in alignment optical sensor 4, consisting of a magnification optical system 5 and a phototiode or phototransistor matrix 6 lying behind it in the beam path, a cutting edge 3 is introduced in a precisely defined manner, wherein on the matrix 6 a corresponding shadow is generated.

This shadow is converted into a transducer 7 in a proportional electrical signal and passes through an amplifier 8, an analog-to-digital converter 9 and a display unit 10 for reading.

Now, if the worn cutting edge 3 defined exactly as introduced into the device, resulting in accordance with the degree of wear a reduced shadow and thus a change in the electrical signal whose value is read on the display unit 10, wherein the voltage difference is proportional to the degree of wear.

Claims (2)

1. A device for cutting wear measurement of geometrically determined sheaths cutting tools, characterized in that in front of a reflector (1) a light source (2) and at a fixed distance to an optical sensor (4) consisting of a magnifying optics (5) and one in the beam path behind the underlying Fotodioden- or Fototransistormatrix (6), wherein the Fotodioden- or Fototransistormatrix (6) via a transducer (7), an amplifier (8), an analog-to-digital converter (9) with a display unit (10 ) connected is. 2. Device according to item 1, characterized in that a cutting edge (3) in the space between the optical sensor (4) and the light source (2) defined is introduced.