SU856821A1 - Diamond tool for ring drilling - Google Patents

Description

I

The invention relates to the processing of non-metallic materials such as glass, quartz, ceramics, etc.

A diamond ring drill is known for producing holes in nonmetallic materials, including a housing and cutting diamond-bearing elements SP.

A disadvantage of the known ring drill is that it does not have the ability to simultaneously drill and chamfer the resulting hole i

The closest to the present invention is a diamond tool for hole drilling, comprising a POLAND Cylindrical body with an end cutting part G

However, in a number of cases, for example, in the manufacture of cutting-edge glasses by the method of diamond drilling, it is necessary to remove the radius of the chamfer from the drill-through of the product (core),

and the well-known tool does not provide the specified operation.

The purpose of the invention is the expansion of technological capabilities.

This goal is achieved by the fact that the diamond tool for cutting the drilling, the twisting hollow cylindrical body with a diamond-bearing end cutting part, is equipped with a device for chamfering, In the case, additional cutting elements are spring-loaded relative to the body, and Straight longitudinal grooves in which additional pivot elements are placed.

FIG. 1 shows a diamond tool for circular drilling, a general view; in fig. 2, an additional device (its element for removing rounded bevels (fillets); on

Claims (2)

d. 3 - the same, for straight line chamfers; in fig. 4 is a section A-A in FIG. 3. A diamond tool for annular drilling consists of a hollow cylindrical casing 1, on the face of which cutting elements 2 are mounted, made, for example, in the diamond-bearing segments. In the internal cavity of the body, I cut (Cie elements 3 are fixed so that their cutting surfaces intersect in terms of the circumference of the inner diameter d of the drill. Cutting elements 3 when removing rounded chamfers are fixed, for example, at the end of the elastic plate 4 (Fig. 1 and 2) , the other end of the swarm is fixed on the drill body, and the part of the cutting element, together with the free end of the plate-20 5 of the tube 4, fits into the longitudinal groove of the tool body 1. The cutting elements 3 when removing the straight line chamfers (for example, at an angle of 45 to product surface) secured On sliders 5 (figs. 3 and 4) installed in the longitudinal grooves of the tool body 1 with the ability to move along the grooves, the sliders 5 with diamond-bearing cutting elements 3 fixed to them are spring-loaded. During operation, the tool is associated with rotational and translational motion relative to the axis drill bits. Cutting elements 2 cut an annular groove in the material being machined. As the tool penetrates, the surface of the material 6 approaches the cutting surfaces of the cutting elements 3. In contact with With the edge of the core-forming (shyuminatorny glass), the material of the workpiece is removed and the chamfer is formed. In the case of removing the rounded chamfer (Fig. 2), the cutting element 3 fixed on the elastic plate 4 first processes the peripheral part of the product 1, then, as the tool deepens, gradually deviates into the body, processing the part of the product located closer to its center. In this case, the spot of contact of the additional cutting element with the product moves along the cutting surface, which ensures its uniform wear. The circumferential forces acting on the cutting element are sensed by the tool body. For this purpose, the width of the grooves in the tool body, which includes non-diamond parts of the cutting elements 3, is chosen approximately equal to the width of the latter. In the case of straight chamfering (Figs. 3 and 4), the cutting elements 3 move with the sliders under the action of the material being processed along the grooves in the tool body, compressing the springs. After the drilling is completed and the tool is removed from the cutting zone, the additional cutting elements are returned to their original position by the action of elastic forces. The invention diamond drill tool for hole drilling, comprising a hollow cylindrical body with an end cutting part, characterized in that, in order to expand technological capabilities, it is equipped with a device for chamfering, made in the form of additional cutting elements spring-biased relative to the body the bodies are made longitudinal grooves in which additional cutting elements are placed. . Sources of information taken into account during the examination 1. USSR author's certificate No. 442938, cn. In 28 About 1/14, 1973. 2. USSR author's certificate number 651902, cl. B 23 B 51/04, 1977.