Diamond cutter

 

(57) Abstract:

The invention relates to the treatment of materials by cutting, in particular for diamond tool manufacturing amplitude diffraction gratings and similar products. The cutter has a front surface, two side planar face and a rear surface, part of which is from the top of the cutter is made flat. To improve the quality of the production amplitude diffraction gratings by improving the cutting properties of the front surface is made concave cylindrical and flat part of the back surface paired with a cylindrical part made on the rear surface. Thus the value of the angle formed by the plane tangent to the front cylindrical surface at the apex of the cutter, and the flat part of the back surface is selected in the range of 60-85. 2 Il.

The invention relates to the treatment of materials by cutting, in particular for diamond tool manufacturing amplitude diffraction gratings and similar products.

The diffraction amplitude grating is a regular structure of transparent and opaque strip elements formed in a thin (0.0002 mm - 0,008 mm) metal layer deposited on cachestate amplitude gratings". Priority from 29.11.82 year). The cutter includes two lateral cylindrical surface and an additional planar face positioned at an angle 1-2oto the plane perpendicular to the longitudinal axis of the tool holder of the tool.

The lack of cutter is that the material layer when forming them grooves of the grating is not cut and plastically deformed and shifted in the adjacent cutter plots layer, this leads to the formation of piles and increased tension in these areas and, as a consequence, sometimes to the separation layer from the substrate.

The closest in technical essence to the proposed diamond cutter is diamond cutter (see the compilation of Diamond tools in engineering. Lenizdat, 1965, page 86, Fig. 8). The cutter has a flat side, the front and rear faces. The rear face is at an angle 35oto the plane perpendicular to the axis of the tool holder of the tool.

The lack of cutter is that when forming the grooves of the grating cutter with a sharp peak (55o) touches the glass substrate, i.e., the contact area is very small, specific same high pressure, resulting on the surface of the workpiece, i.e., on a transparent elements scratches are formed. In addition, the reduced optical performance of the grating.

The objective of the invention is improving the quality of the production amplitude diffraction gratings, due to the improved cutting properties of the diamond cutter.

This object is achieved in that in the diamond cutter, containing the front surface, two side planar face and a rear surface, part of which is from the top of the cutter is made flat, the front surface is made concave cylindrical, and the rear flat portion of the rear surface paired with a cylindrical part made on the rear surface, and the angle formed by the plane tangent to the front cylindrical surface at the apex of the cutter, and the flat part of the back surface that is selected in the range from 60 to 85o.

In Fig. 1 there is shown a cutter, front view,

in Fig. 2 - the same, lateral view.

Diamond cutter includes: a holder 1, enshrined in her diamond 2, the front concave cylindrical surface 3, two lateral flat faces 4 and 5, and enclosed between the rear surface, one piece 6 which, from the top 7 of the cutter, made flat, owing turning 8 in the cylindrical part of the back surface. Concave front cylindrical surface 3, in the top 7 pick, but the part 6 of the rear surface. This angle is selected within 60 - 85o.

The cutter works as follows.

The cutter is mounted relative to the workpiece (substrate with a metal layer) in Fig. not shown, so that it touches its cylindrical portion 8 of the rear surface. Then reduce the installation angle between the flat part 6 of the rear surface to zero, then the cutter is moved in the direction indicated by the arrow A. When the material layer of the workpiece is to be cut at its full thickness, leaving behind the transparent elements of the lattice of the desired width, and there are no piles on the edges of the strokes.

The angle of the cutter within 60-85oselected from conditions improve cutting and strength properties. The choice of angle < 60oreduces the mechanical properties of the top 7 of the cutter, resulting in an increase in the probability of splitting it, and when the angle of > 85oincreases the force on the branch cut of the layer from the substrate, it causes deformation of the layer before the cutter and increases the stress in the layer, which extends adjacent to the cutter plots layer that lead to the separation from the substrate in these areas.

So abovespecified running grooves of the grating full profile with transparent sections of the desired width.

Diamond cutter having a front surface, two side planar face and a rear surface, part of which is from the top of the cutter is made flat, characterized in that the front surface is made concave cylindrical and flat part of the back surface paired with a cylindrical part made on the rear surface, and the angle formed by the plane tangent to the front cylindrical surface at the apex of the cutter, and the flat part of the back surface that is selected in the range of 60 - 85o.

 

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